76 research outputs found
Low infra red laser light irradiation on cultured neural cells: effects on mitochondria and cell viability after oxidative stress
- Author
- A Higuchi
- A Higuchi
- A Higuchi
- A Menter
- A Pugnaloni
- Alessandro Giuliani
- Alessandro Massella
- AV Corazza
- B Beauvoit
- B Culley
- C Deister
- CE Cooper
- CS Lee
- DG Attiah
- FA Al-Watban
- FH Van Duijnhoven
- G Loers
- J Keshmirian
- J Luo
- JT Eells
- KD Desmet
- L Bolognani
- LA Greene
- Laura CalzĂ
- Luca Lorenzini
- Luciana Giardino
- M Reers
- Michele Gallamini
- MT Wong-Riley
- P GĂĄl
- RJ White
- S Krengel
- S Salvioli
- ST Smiley
- T Mosmann
- TI Karu
- TI Karu
- TI Karu
- TI Karu
- TI Karu
- TI Karu
- TI Karu
- V Bocchini
- VN Dedov
- Y Wollman
- Y Wollman
- Publication venue
- BioMed Central
- Publication date
- 01/01/2009
- Field of study
<p>Abstract</p> <p>Background</p> <p>Considerable interest has been aroused in recent years by the well-known notion that biological systems are sensitive to visible light. With clinical applications of visible radiation in the far-red to near-infrared region of the spectrum in mind, we explored the effect of coherent red light irradiation with extremely low energy transfer on a neural cell line derived from rat pheochromocytoma. We focused on the effect of pulsed light laser irradiation vis-Ă -vis two distinct biological effects: neurite elongation under NGF stimulus on laminin-collagen substrate and cell viability during oxidative stress.</p> <p>Methods</p> <p>We used a 670 nm laser, with extremely low peak power output (3 mW/cm<sup>2</sup>) and at an extremely low dose (0.45 mJ/cm<sup>2</sup>). Neurite elongation was measured over three days in culture. The effect of coherent red light irradiation on cell reaction to oxidative stress was evaluated through live-recording of mitochondria membrane potential (MMP) using JC1 vital dye and laser-confocal microscopy, in the absence (photo bleaching) and in the presence (oxidative stress) of H<sub>2</sub>O<sub>2</sub>, and by means of the MTT cell viability assay.</p> <p>Results</p> <p>We found that laser irradiation stimulates NGF-induced neurite elongation on a laminin-collagen coated substrate and protects PC12 cells against oxidative stress.</p> <p>Conclusion</p> <p>These data suggest that red light radiation protects the viability of cell culture in case of oxidative stress, as indicated by MMP measurement and MTT assay. It also stimulates neurite outgrowth, and this effect could also have positive implications for axonal protection.</p
Test of lepton universality in bâsâ+ââ decays
- Author
- Aaij R
- Abdelmotteleb ASW
- Abellan Beteta C
- Abudinén F
- Ackernley T
- Adeva B
- Adinolfi M
- Adlarson P
- Afsharnia H
- Agapopoulou C
- Aidala CA
- Ajaltouni Z
- Akar S
- Akiba K
- Albicocco P
- Albrecht J
- Alessio F
- Alexander M
- Alfonso Albero A
- Aliouche Z
- Alvarez Cartelle P
- Amalric R
- Amato S
- Amey JL
- Amhis Y
- An L
- Anderlini L
- Andersson M
- Andreianov A
- Andreotti M
- Andreou D
- Ao D
- Archilli F
- Artamonov A
- Artuso M
- Aslanides E
- Atzeni M
- Audurier B
- Bachiller Perea I
- Bachmann S
- Bachmayer M
- Back JJ
- Bailly-Reyre A
- Baladron Rodriguez P
- Balagura V
- Baldini W
- Baptista de Souza Leite J
- Barbetti M
- Barlow RJ
- Barsuk S
- Barter W
- Bartolini M
- Baryshnikov F
- Basels JM
- Bassi G
- Batsukh B
- Battig A
- Bay A
- Beck A
- Becker M
- Bedeschi F
- Bediaga IB
- Beiter A
- Belin S
- Bellee V
- Belous K
- Belov I
- Belyaev I
- Ben-Haim E
- Benane G
- Bencivenni G
- Berezhnoy A
- Bernet Andres S
- Bernet R
- Berninghoff D
- Bernstein HC
- Bertella C
- Bertolin A
- Betancourt C
- Betti F
- Bezshyiko Ia
- Bhom J
- Bian L
- Bieker MS
- Biesuz NV
- Bifani S
- Billoir P
- Biolchini A
- Birch M
- Bishop FCR
- Bitadze A
- Bizzeti A
- Blago MP
- Blake T
- Blanc F
- Blank JE
- Blusk S
- Bobulska D
- Boelhauve JA
- Boente Garcia O
- Boettcher T
- Boldyrev A
- Bolognani CS
- Bolzonella R
- Bondar N
- Borgato F
- Borghi S
- Borsato M
- Borsuk JT
- Bouchiba SA
- Bowcock TJV
- Boyer A
- Bozzi C
- Bradley MJ
- Braun S
- Brea Rodriguez A
- Brodzicka J
- Brossa Gonzalo A
- Brown J
- Brundu D
- Buonaura A
- Buonincontri L
- Burke AT
- Burr C
- Bursche A
- Butkevich A
- Butter JS
- Buytaert J
- Byczynski W
- Cadeddu S
- Cai H
- Calabrese R
- Calefice L
- Cali S
- Calladine R
- Calvi M
- Calvo Gomez M
- Campana P
- Campora Perez DH
- Campoverde Quezada AF
- Capelli S
- Capriotti L
- Carbone A
- Cardinale R
- Cardini A
- Carniti P
- Carus L
- Casais Vidal A
- Caspary R
- Casse G
- Cattaneo M
- Cavallero G
- Cavallini V
- Celani S
- Cerasoli J
- Cervenkov D
- Chadwick AJ
- Chahrour I
- Chapman MG
- Charles M
- Charpentier Ph
- Chavez Barajas CA
- Chefdeville M
- Chen C
- Chen S
- Chernov A
- Chernyshenko S
- Chobanova V
- Cholak S
- Chrzaszcz M
- Chubykin A
- Chulikov V
- Ciambrone P
- Cicala MF
- Cid Vidal X
- Ciezarek G
- Cifra P
- Ciullo G
- Clarke PEL
- Clemencic M
- Cliff HV
- Closier J
- Cobbledick JL
- Coco V
- Cogan J
- Cogneras E
- Cojocariu L
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- Corredoira I
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- Craik DC
- Cruz Torres M
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- D'Ambrosio C
- d'Argent P
- Da Silva CL
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- Dall'Occo E
- Dalseno J
- Daniel J
- Danilina A
- Davies JE
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- de Boer J
- De Bruyn K
- De Capua S
- De Cian M
- De Freitas Carneiro Da Graca U
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- De Simone D
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- de Vries JA
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- Felkowski LF
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- Fitzgerald DS
- Fitzpatrick C
- Fiutowski T
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- Franco Lima V
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- Jaimes Elles SJ
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- Leverington B
- LHCb Collaboration
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- Wormser G
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- Wyllie K
- Xiang Z
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- Zeng M
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- Zhelezov A
- Zheng Y
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- Zhou X
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- Zou Q
- Zucchelli S
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- Zunica G
- Publication venue
- Publication date
- 18/12/2022
- Field of study
The first simultaneous test of muon-electron universality using
B+âK+â+ââ and B0âKâ0â+ââ decays is performed, in two ranges of the dilepton
invariant-mass squared, q2. The analysis uses beauty mesons produced in
proton-proton collisions collected with the LHCb detector between 2011 and
2018, corresponding to an integrated luminosity of 9 fbâ1. Each
of the four lepton universality measurements reported is either the first in
the given q2 interval or supersedes previous LHCb measurements. The
results are compatible with the predictions of the Standard Model.Comment: All figures and tables, along with any supplementary material and
additional information, are available at
https://cern.ch/lhcbproject/Publications/p/LHCb-PAPER-2022-046.html (LHCb
public pages
Precision measurement of CP violation in the penguin-mediated decay Bs0ââÏÏ
- Author
- Aaij R
- Abdelmotteleb ASW
- Abellan Beteta C
- Abudinén F
- Ackernley T
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- Wislicki W
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- Zunica G
- Publication venue
- Publication date
- 01/01/2023
- Field of study
A flavor-tagged time-dependent angular analysis of the decay
Bs0ââÏÏ is performed using pp collision data collected
by the LHCb experiment at % at sâ=13 TeV, the center-of-mass energy of
13 TeV, corresponding to an integrated luminosity of 6 fb^{-1}. The
CP-violating phase and direct CP-violation parameter are measured
to be ÏssËsâ=â0.042±0.075±0.009 rad and
âŁÎ»âŁ=1.004±0.030±0.009, respectively, assuming the same values
for all polarization states of the ÏÏ system. In these results, the
first uncertainties are statistical and the second systematic. These parameters
are also determined separately for each polarization state, showing no evidence
for polarization dependence. The results are combined with previous LHCb
measurements using pp collisions at center-of-mass energies of 7 and 8 TeV,
yielding ÏssËsâ=â0.074±0.069 rad and âŁlambdaâŁ=1.009±0.030. This is the most precise study of time-dependent CP violation
in a penguin-dominated B meson decay. The results are consistent with
CP symmetry and with the Standard Model predictions.Comment: All figures and tables, along with any supplementary material and
additional information, are available at
https://cern.ch/lhcbproject/Publications/p/LHCb-PAPER-2023-001.html (LHCb
public pages
First observation of a doubly charged tetraquark and its neutral partner
- Author
- Aaij R
- Abdelmotteleb ASW
- Abellan Beteta C
- Abudinén F
- Ackernley T
- Adeva B
- Adinolfi M
- Adlarson P
- Afsharnia H
- Agapopoulou C
- Aidala CA
- Aiola S
- Ajaltouni Z
- Akar S
- Akiba K
- Albrecht J
- Alessio F
- Alexander M
- Alfonso Albero A
- Aliouche Z
- Alvarez Cartelle P
- Amalric R
- Amato S
- Amey JL
- Amhis Y
- An L
- Anderlini L
- Andersson M
- Andreianov A
- Andreotti M
- Andreou D
- Ao D
- Archilli F
- Artamonov A
- Artuso M
- Aslanides E
- Atzeni M
- Audurier B
- Bachmann S
- Bachmayer M
- Back JJ
- Bailly-Reyre A
- Baladron Rodriguez P
- Balagura V
- Baldini W
- Baptista de Souza Leite J
- Barbetti M
- Barlow RJ
- Barsuk S
- Barter W
- Bartolini M
- Baryshnikov F
- Basels JM
- Bassi G
- Batsukh B
- Battig A
- Bay A
- Beck A
- Becker M
- Bedeschi F
- Bediaga IB
- Beiter A
- Belavin V
- Belin S
- Bellee V
- Belous K
- Belov I
- Belyaev I
- Ben-Haim E
- Benane G
- Bencivenni G
- Berezhnoy A
- Bernet Andres S
- Bernet R
- Berninghoff D
- Bernstein HC
- Bertella C
- Bertolin A
- Betancourt C
- Betti F
- Bezshyiko Ia
- Bhasin S
- Bhom J
- Bian L
- Bieker MS
- Biesuz NV
- Bifani S
- Billoir P
- Biolchini A
- Birch M
- Bishop FCR
- Bitadze A
- Bizzeti A
- Blago MP
- Blake T
- Blanc F
- Blank JE
- Blusk S
- Bobulska D
- Boelhauve JA
- Boente Garcia O
- Boettcher T
- Boldyrev A
- Bolognani CS
- Bolzonella R
- Bondar N
- Borgato F
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- Westhenry BDC
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- Wislicki W
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- Wormser G
- Wotton SA
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- Wyllie K
- Xiang Z
- Xiao D
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- Yeroshenko V
- Yeung H
- Yin H
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- Zaffaroni E
- Zavertyaev M
- Zdybal M
- Zenaiev O
- Zeng M
- Zhang C
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- Zhang S
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- Zhang Y
- Zharkova A
- Zhelezov A
- Zheng Y
- Zhou T
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- Zhu Z
- Zhukov V
- Zou Q
- Zucchelli S
- Zuliani D
- Zunica G
- Publication venue
- Publication date
- 01/01/2023
- Field of study
A combined amplitude analysis is performed for the decays B0âD0Ds+âÏâ and B+âDâDs+âÏ+, which are
related by isospin symmetry. The analysis is based on data collected by the
LHCb detector in proton-proton collisions at center-of-mass energies of 7, 8
and 13TeV. The full data sample corresponds to an integrated
luminosity of 9fbâ1. Two new resonant states with masses of
2.908±0.011±0.020GeV and widths of
0.136±0.023±0.011GeV are observed, which decay to Ds+âÏ+ and
Ds+âÏâ respectively. The former state indicates the first observation of
a doubly charged open-charm tetraquark state with minimal quark content
[csËudË], and the latter state is a neutral tetraquark composed of
[csËuËd] quarks. Both states are found to have spin-parity 0+,
and their resonant parameters are consistent with each other, which suggests
that they belong to an isospin triplet.Comment: All figures and tables, along with any supplementary material and
additional information, are available at
https://cern.ch/lhcbproject/Publications/p/LHCb-PAPER-2022-026.html (LHCb
public pages
Observation of a resonant structure near the Ds+âDsââ threshold in the B+âDs+âDsââK+ decay
- Author
- Aaij R
- Abdelmotteleb ASW
- Abellan Beteta C
- Abudinén F
- Ackernley T
- Adeva B
- Adinolfi M
- Afsharnia H
- Agapopoulou C
- Aidala CA
- Aiola S
- Ajaltouni Z
- Akar S
- Akiba K
- Albrecht J
- Alessio F
- Alexander M
- Alfonso Albero A
- Aliouche Z
- Alvarez Cartelle P
- Amalric R
- Amato S
- Amey JL
- Amhis Y
- An L
- Anderlini L
- Andersson M
- Andreianov A
- Andreotti M
- Andreou D
- Ao D
- Archilli F
- Artamonov A
- Artuso M
- Aslanides E
- Atzeni M
- Audurier B
- Bachmann S
- Bachmayer M
- Back JJ
- Bailly-Reyre A
- Baladron Rodriguez P
- Balagura V
- Baldini W
- Baptista de Souza Leite J
- Barbetti M
- Barlow RJ
- Barsuk S
- Barter W
- Bartolini M
- Baryshnikov F
- Basels JM
- Bassi G
- Batsukh B
- Battig A
- Bay A
- Beck A
- Becker M
- Bedeschi F
- Bediaga IB
- Beiter A
- Belavin V
- Belin S
- Bellee V
- Belous K
- Belov I
- Belyaev I
- Ben-Haim E
- Benane G
- Bencivenni G
- Berezhnoy A
- Bernet Andres S
- Bernet R
- Berninghoff D
- Bernstein HC
- Bertella C
- Bertolin A
- Betancourt C
- Betti F
- Bezshyiko Ia
- Bhasin S
- Bhom J
- Bian L
- Bieker MS
- Biesuz NV
- Bifani S
- Billoir P
- Biolchini A
- Birch M
- Bishop FCR
- Bitadze A
- Bizzeti A
- Blago MP
- Blake T
- Blanc F
- Blusk S
- Bobulska D
- Boelhauve JA
- Boente Garcia O
- Boettcher T
- Boldyrev A
- Bolognani CS
- Bolzonella R
- Bondar N
- Borgato F
- Borghi S
- Borsato M
- Borsuk JT
- Bouchiba SA
- Bowcock TJV
- Boyer A
- Bozzi C
- Bradley MJ
- Braun S
- Brea Rodriguez A
- Brodzicka J
- Brossa Gonzalo A
- Brown J
- Brundu D
- Buonaura A
- Buonincontri L
- Burke AT
- Burr C
- Bursche A
- Butkevich A
- Butter JS
- Buytaert J
- Byczynski W
- Cadeddu S
- Cai H
- Calabrese R
- Calefice L
- Cali S
- Calladine R
- Calvi M
- Calvo Gomez M
- Campana P
- Campora Perez DH
- Campoverde Quezada AF
- Capelli S
- Capriotti L
- Carbone A
- Carboni G
- Cardinale R
- Cardini A
- Carli I
- Carniti P
- Carus L
- Casais Vidal A
- Caspary R
- Casse G
- Cattaneo M
- Cavallero G
- Cavallini V
- Celani S
- Cerasoli J
- Cervenkov D
- Chadwick AJ
- Chapman MG
- Charles M
- Charpentier Ph
- Chavez Barajas CA
- Chefdeville M
- Chen C
- Chen S
- Chernov A
- Chernyshenko S
- Chobanova V
- Cholak S
- Chrzaszcz M
- Chubykin A
- Chulikov V
- Ciambrone P
- Cicala MF
- Cid Vidal X
- Ciezarek G
- Ciullo G
- Clarke PEL
- Clemencic M
- Cliff HV
- Closier J
- Cobbledick JL
- Coco V
- Coelho JAB
- Cogan J
- Cogneras E
- Cojocariu L
- Collins P
- Colombo T
- Congedo L
- Contu A
- Cooke N
- Corredoira I
- Corti G
- Couturier B
- Craik DC
- CrkovskĂĄ J
- Cruz Torres M
- Currie R
- D'Ambrosio C
- d'Argent P
- Da Silva CL
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- Zuliani D
- Zunica G
- Publication venue
- Publication date
- 26/10/2022
- Field of study
An amplitude analysis of the B+âDs+âDsââK+ decay is carried out to
study for the first time its intermediate resonant contributions, using
proton-proton collision data collected with the LHCb detector at centre-of-mass
energies of 7, 8 and 13 TeV. A near-threshold peaking structure, referred to as
X(3960), is observed in the Ds+âDsââ invariant-mass spectrum with
significance greater than 12 standard deviations. The mass, width and the
quantum numbers of the structure are measured to be 3956±5±10 MeV,
43±13±8 MeV and JPC=0++, respectively, where the first
uncertainties are statistical and the second systematic. The properties of the
new structure are consistent with recent theoretical predictions for a state
composed of ccËssË quarks. Evidence for an additional structure is
found around 4140 MeV in the Ds+âDsââ invariant mass, which might be
caused either by a new resonance with the 0++ assignment or by a J/ÏÏâDs+âDsââ coupled-channel effect.Comment: All figures and tables, along with any supplementary material and
additional information, are available at
https://cern.ch/lhcbproject/Publications/p/LHCb-PAPER-2022-018.html (LHCb
public pages
Measurement of the Îb0ââÎ(1520)ÎŒ+ÎŒâ differential branching fraction
- Author
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- Abdelmotteleb ASW
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- Abudinén F
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- Aidala CA
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- Dall'Occo E
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- Danilina A
- Davies JE
- Davis A
- De Aguiar Francisco O
- de Boer J
- De Bruyn K
- De Capua S
- De Cian M
- De Freitas Carneiro Da Graca U
- De Lucia E
- De Miranda JM
- De Paula L
- De Serio M
- De Simone D
- De Simone P
- De Vellis F
- de Vries JA
- Dean CT
- Debernardis F
- Decamp D
- Dedu V
- Del Buono L
- Delaney B
- Dembinski H-P
- Denysenko V
- Deschamps O
- Dettori F
- Dey B
- Di Nezza P
- Diachkov I
- Didenko S
- Dieste Maronas L
- Ding S
- Dobishuk V
- Dolmatov A
- Dong C
- Donohoe AM
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- Dos Reis AC
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- Ejopu E
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- Escher S
- Eschle J
- Esen S
- Evans T
- Fabiano F
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- Fan Y
- Fang B
- Fantini L
- Faria M
- Farry S
- Fazzini D
- Felkowski L
- Feo M
- Fernandez Gomez M
- Fernez AD
- Ferrari F
- Ferreira Lopes L
- Ferreira Rodrigues F
- Ferreres Sole S
- Ferrillo M
- Ferro-Luzzi M
- Filippov S
- Fini RA
- Fiorini M
- Firlej M
- Fischer KM
- Fitzgerald DS
- Fitzpatrick C
- Fiutowski T
- Fleuret F
- Fontana M
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- Publication venue
- Publication date
- 01/01/2023
- Field of study
The branching fraction of the rare decay Îb0ââÎ(1520)ÎŒ+ÎŒâ is measured for the first time, in the squared dimuon mass
intervals, q2, excluding the J/Ï and Ï(2S) regions. The data
sample analyzed was collected by the LHCb experiment at center-of-mass energies
of 7, 8, and 13 TeV, corresponding to a total integrated luminosity of $9\
\mathrm{fb}^{-1}.Theresultinthehighestq^{2}interval,q^{2} >15.0\
\mathrm{GeV}^2/c^4$, where theoretical predictions have the smallest model
dependence, agrees with the predictions.Comment: All figures and tables, along with any supplementary material and
additional information, are available at
https://cern.ch/lhcbproject/Publications/p/LHCb-PAPER-2022-050.html (LHCb
public pages
Measurement of the ratios of branching fractions R(D*) and R(D0)
- Author
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- Hill D
- Hilton M
- Hollitt SE
- Horswill J
- Hou R
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- Huang X
- Hulsbergen W
- Hunter RJ
- Hushchyn M
- Hutchcroft D
- Ibis P
- Idzik M
- Ilin D
- Ilten P
- Inglessi A
- Iniukhin A
- Ishteev A
- Ivshin K
- Jacobsson R
- Jage H
- Jaimes Elles SJ
- Jakobsen S
- Jans E
- Jashal BK
- Jawahery A
- Jevtic V
- Jiang E
- Jiang X
- Jiang Y
- John M
- Johnson D
- Jones CR
- Jones TP
- Jost B
- Jurik N
- Juszczak I
- Kandybei S
- Kang Y
- Karacson M
- Karpenkov D
- Karpov M
- Kautz JW
- Keizer F
- Keller DM
- Kenzie M
- Ketel T
- Khanji B
- Kharisova A
- Kholodenko S
- Khreich G
- Kirn T
- Kirsebom VS
- Kitouni O
- Klaver S
- Kleijne N
- Klimaszewski K
- Kmiec MR
- Koliiev S
- Kolk L
- Kondybayeva A
- Konoplyannikov A
- Kopciewicz P
- Kopecna R
- Koppenburg P
- Korolev M
- Kostiuk I
- Kot O
- Kotriakhova S
- Kozachuk A
- Kravchenko P
- Kravchuk L
- Krawczyk RD
- Kreps M
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- Krokovny P
- Krupa W
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- Kubat J
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- Kulikova EK
- Kupsc A
- Lacarrere D
- Lafferty G
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- Li A
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- Zharkova A
- Zhelezov A
- Zheng Y
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- Zhu X
- Zhu Z
- Zhukov V
- Zou Q
- Zucchelli S
- Zuliani D
- Zunica G
- Publication venue
- American Physical Society
- Publication date
- 01/01/2023
- Field of study
The ratios of branching fractions
R
(
D
â
)
âĄ
B
(
ÂŻ
B
â
D
â
Ï
â
ÂŻ
Μ
Ï
)
/
B
(
ÂŻ
B
â
D
â
Ό
â
ÂŻ
Μ
Ό
)
and
R
(
D
0
)
âĄ
B
(
B
â
â
D
0
Ï
â
ÂŻ
Μ
Ï
)
/
B
(
B
â
â
D
0
Ό
â
ÂŻ
Μ
Ό
)
are measured, assuming isospin symmetry, using a sample of proton-proton collision data corresponding to
3.0
â
â
fb
â
1
of integrated luminosity recorded by the LHCb experiment during 2011 and 2012. The tau lepton is identified in the decay mode
Ï
â
â
Ό
â
Μ
Ï
ÂŻ
Μ
Ό
. The measured values are
R
(
D
â
)
=
0.281
±
0.018
±
0.024
and
R
(
D
0
)
=
0.441
±
0.060
±
0.066
, where the first uncertainty is statistical and the second is systematic. The correlation between these measurements is
Ï
=
â
0.43
. The results are consistent with the current average of these quantities and are at a combined 1.9 standard deviations from the predictions based on lepton flavor universality in the standard model
Search for rare decays of D0 mesons into two muons
- Author
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- Idzik M
- Ilin D
- Ilten P
- Inglessi A
- Iniukhin A
- Ishteev A
- Ivshin K
- Jacobsson R
- Jage H
- Jaimes Elles SJ
- Jakobsen S
- Jans E
- Jashal BK
- Jawahery A
- Jevtic V
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- Jiang Y
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- Juszczak I
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- Karpenkov D
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- Kautz JW
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- Kucewicz W
- Kucharczyk M
- Kudryavtsev V
- Kupsc A
- Lacarrere D
- Lafferty G
- Lai A
- Lampis A
- Lancierini D
- Landesa Gomez C
- Lane JJ
- Lane R
- Lanfranchi G
- Langenbruch C
- Langer J
- Lantwin O
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- Le Gac R
- Lee SH
- Leflat A
- LefĂšvre R
- Legotin S
- Lenisa P
- Leroy O
- Lesiak T
- Leverington B
- LHCb Collaboration
- Li A
- Li H
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- Li Z
- Liang X
- Lin C
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- Mackay I
- Macko V
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- Madhan Mohan LR
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- Websdale D
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- Westhenry BDC
- White DJ
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- Wiederhold AR
- Wiedner D
- Wilkinson G
- Wilkinson MK
- Williams I
- Williams M
- Williams MRJ
- Williams R
- Wilson FF
- Wislicki W
- Witek M
- Witola L
- Wong CP
- Wormser G
- Wotton SA
- Wu H
- Wu J
- Wyllie K
- Xiang Z
- Xiao D
- Xie Y
- Xu A
- Xu J
- Xu L
- Xu L
- Xu M
- Xu Q
- Xu Z
- Xu Z
- Yang D
- Yang S
- Yang X
- Yang Y
- Yang Z
- Yang Z
- Yeomans LE
- Yeroshenko V
- Yeung H
- Yin H
- Yu J
- Yuan X
- Zaffaroni E
- Zavertyaev M
- Zdybal M
- Zenaiev O
- Zeng M
- Zhang C
- Zhang D
- Zhang L
- Zhang S
- Zhang S
- Zhang Y
- Zhang Y
- Zharkova A
- Zhelezov A
- Zheng Y
- Zhou T
- Zhou X
- Zhou Y
- Zhovkovska V
- Zhu X
- Zhu X
- Zhu Z
- Zhukov V
- Zou Q
- Zucchelli S
- Zuliani D
- Zunica G
- Publication venue
- American Physical Society
- Publication date
- 21/12/2022
- Field of study
A search for the very rare
D
0
â
Ό
+
Ό
â
decay is performed using data collected by the LHCb experiment in proton-proton collisions at
â
s
=
7
, 8, and 13 TeV, corresponding to an integrated luminosity of
9
â
â
fb
â
1
. The search is optimized for
D
0
mesons from
D
*
+
â
D
0
Ï
+
decays but is also sensitive to
D
0
mesons from other sources. No evidence for an excess of events over the expected background is observed. An upper limit on the branching fraction of this decay is set at
B
(
D
0
â
Ό
+
Ό
â
)
<
3.1
Ă
10
â
9
at a 90% C.L. This represents the worldâs most stringent limit, constraining models of physics beyond the standard model
Precision measurement of CP violation in the penguin-mediated decay Bs0âÏÏ
- Author
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- Abdelmotteleb ASW
- Abellan Beteta C
- Abudinén F
- Ackernley T
- Adeva B
- Adinolfi M
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- Belyaev I
- Ben-Haim E
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- Berezhnoy A
- Bernet Andres S
- Bernet R
- Berninghoff D
- Bernstein HC
- Bertella C
- Bertolin A
- Betancourt C
- Betti F
- Bezshyiko Ia
- Bhom J
- Bian L
- Bieker MS
- Biesuz NV
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- Biolchini A
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- Bishop FCR
- Bitadze A
- Bizzeti A
- Blago MP
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- Blank JE
- Blusk S
- Bobulska D
- Bocharnikov VB
- Boelhauve JA
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- Boldyrev A
- Bolognani CS
- Bolzonella R
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- Borsuk JT
- Bouchiba SA
- Bowcock TJV
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- Brea Rodriguez A
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- Brodzicka J
- Brossa Gonzalo A
- Brown J
- Brundu D
- Buonaura A
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- Byczynski W
- Cadeddu S
- Cai H
- Calabrese R
- Calefice L
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- Calvo Gomez M
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- Campoverde Quezada AF
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- Cerasoli J
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- Chefdeville M
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- Chernov A
- Chernyshenko S
- Chobanova V
- Cholak S
- Chrzaszcz M
- Chubykin A
- Chulikov V
- Ciambrone P
- Cicala MF
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- Cliff HV
- Closier J
- Cobbledick JL
- Coco V
- Cogan J
- Cogneras E
- Cojocariu L
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- Colombo T
- Congedo L
- Contu A
- Cooke N
- Corredoira I
- Corti G
- Couturier B
- Craik DC
- Cruz Torres M
- Currie R
- D'Ambrosio C
- d'Argent P
- Da Silva CL
- Dadabaev S
- Dai L
- Dai X
- Dall'Occo E
- Dalseno J
- Daniel J
- Danilina A
- Davies JE
- Davis A
- De Aguiar Francisco O
- de Boer J
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- De Capua S
- De Cian M
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- De Lucia E
- De Miranda JM
- De Paula L
- De Serio M
- De Simone D
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- de Vries JA
- Dean CT
- Debernardis F
- Decamp D
- Dedu V
- Del Buono L
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- Dembinski H-P
- Denysenko V
- Deschamps O
- Dettori F
- Dey B
- Di Nezza P
- Diachkov I
- Didenko S
- Dieste Maronas L
- Ding S
- Dobishuk V
- Dolmatov A
- Dong C
- Donohoe AM
- Dordei F
- Dos Reis AC
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- Downes AG
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- Durham JM
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- Dziurda A
- Dzyuba A
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- Egorychev A
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- Fischer KM
- Fitzgerald DS
- Fitzpatrick C
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- Gandelman M
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- Garcia Martin LM
- Garcia Moreno P
- Garcia Plana B
- Garcia Rosales FA
- GarcĂa Pardiñas J
- Garrido L
- Gaspar C
- Geertsema RE
- Gerick D
- Gerken LL
- Gersabeck E
- Gersabeck M
- Gershon T
- Giambastiani L
- Gibson V
- Giemza HK
- Gilman AL
- Giovannetti M
- GioventĂč A
- Gironella Gironell P
- Giugliano C
- Giza MA
- Gizdov K
- Gkougkousis EL
- Gligorov VV
- Golobardes E
- Golubkov D
- Golutvin A
- Gomes A
- Gomez Fernandez S
- Goncalves Abrantes F
- Goncerz M
- Gong G
- Gorelov IV
- Gotti C
- Grabowski JP
- Grammatico T
- Granado Cardoso LA
- Graugés E
- Graverini E
- Graziani G
- Grecu AT
- Greeven LM
- Grieser NA
- Grillo L
- Gromov S
- Gu C
- Guarise M
- Guittiere M
- Guliaeva V
- Guseinov AK
- Gushchin E
- Guz Y
- Gys T
- Göbel C
- GĂŒnther PA
- Hadavizadeh T
- Hadjivasiliou C
- Haefeli G
- Haen C
- Haimberger J
- Haines SC
- Halewood-Leagas T
- Halvorsen MM
- Hamilton PM
- Hammerich J
- Han Q
- Han X
- Hansmann-Menzemer S
- Hao L
- Harnew N
- Harrison T
- Hasse C
- Hatch M
- He J
- Heijhoff K
- Hemmer FH
- Henderson C
- Henderson RDL
- Hennequin AM
- Hennessy K
- Henry L
- Herd JH
- Heuel J
- Hicheur A
- Hill D
- Hilton M
- Hollitt SE
- Horswill J
- Hou R
- Hou Y
- Hu J
- Hu J
- Hu W
- Hu X
- Huang W
- Huang X
- Hulsbergen W
- Hunter RJ
- Hushchyn M
- Hutchcroft D
- Ibis P
- Idzik M
- Ilin D
- Ilten P
- Inglessi A
- Iniukhin A
- Ishteev A
- Ivshin K
- Jacobsson R
- Jage H
- Jaimes Elles SJ
- Jakobsen S
- Jans E
- Jashal BK
- Jawahery A
- Jevtic V
- Jiang E
- Jiang X
- Jiang Y
- John M
- Johnson D
- Jones CR
- Jones TP
- Joshi SJ
- Jost B
- Jurik N
- Juszczak I
- Kandybei S
- Kang Y
- Karacson M
- Karpenkov D
- Karpov M
- Kautz JW
- Keizer F
- Keller DM
- Kenzie M
- Ketel T
- Khanji B
- Kharisova A
- Kholodenko S
- Khreich G
- Kirn T
- Kirsebom VS
- Kitouni O
- Klaver S
- Kleijne N
- Klimaszewski K
- Kmiec MR
- Koliiev S
- Kolk L
- Kondybayeva A
- Konoplyannikov A
- Kopciewicz P
- Kopecna R
- Koppenburg P
- Korolev M
- Kostiuk I
- Kot O
- Kotriakhova S
- Kozachuk A
- Kravchenko P
- Kravchuk L
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- Kretzschmar S
- Krokovny P
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- Krzemien W
- Kubat J
- Kubis S
- Kucewicz W
- Kucharczyk M
- Kudryavtsev V
- Kulikova EK
- Kupsc A
- Lacarrere D
- Lafferty G
- Lai A
- Lampis A
- Lancierini D
- Landesa Gomez C
- Lane JJ
- Lane R
- Langenbruch C
- Langer J
- Lantwin O
- Latham T
- Lazzari F
- Lazzeroni C
- Le Gac R
- Lee SH
- Leflat A
- LefĂšvre R
- Legotin S
- Leroy O
- Lesiak T
- Leverington B
- LHCb Collaboration
- Li A
- Li H
- Li K
- Li P
- Li P-R
- Li S
- Li T
- Li T
- Li Y
- Li Z
- Liang X
- Lin C
- Lin T
- Lindner R
- Lisovskyi V
- Litvinov R
- Liu G
- Liu H
- Liu K
- Liu Q
- Liu S
- Lobo Salvia A
- Loi A
- Lollini R
- Lomba Castro J
- Longstaff I
- Lopes JH
- Lopez Huertas A
- Lovell GH
- Lu Y
- Lucarelli C
- Lucchesi D
- Luchuk S
- Lucio Martinez M
- Lukashenko V
- Luo Y
- Lupato A
- Luppi E
- Lynch K
- Lyu X-R
- López Soliño S
- Ma R
- Maccolini S
- Machefert F
- Maciuc F
- Mackay I
- Macko V
- Madhan Mohan LR
- Maevskiy A
- Maisuzenko D
- Majewski MW
- Malczewski JJ
- Malde S
- Malecki B
- Malinin A
- Maltsev T
- Manca G
- Mancinelli G
- Mancuso C
- Manera Escalero R
- Manuzzi D
- Manzari CA
- Marangotto D
- Maratas JM
- Marchand JF
- Marconi U
- Mariani S
- Marin Benito C
- Marks J
- Marshall AM
- Marshall PJ
- Martelli G
- Martellotti G
- Martinazzoli L
- Martinelli M
- Martinez Santos D
- Martinez Vidal F
- Massafferri A
- Materok M
- Matev R
- Mathad A
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- Watson NK
- Websdale D
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- Westhenry BDC
- White DJ
- Whitehead M
- Wiederhold AR
- Wiedner D
- Wilkinson G
- Wilkinson MK
- Williams I
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- Williams MRJ
- Williams R
- Wilson FF
- Wislicki W
- Witek M
- Witola L
- Wong CP
- Wormser G
- Wotton SA
- Wu H
- Wu J
- Wu Y
- Wyllie K
- Xiang Z
- Xie Y
- Xu A
- Xu J
- Xu L
- Xu L
- Xu M
- Xu Q
- Xu Z
- Xu Z
- Xu Z
- Yang D
- Yang S
- Yang X
- Yang Y
- Yang Z
- Yang Z
- Yeroshenko V
- Yeung H
- Yin H
- Yu J
- Yuan X
- Zaffaroni E
- Zavertyaev M
- Zdybal M
- Zeng M
- Zhang C
- Zhang D
- Zhang JZ
- Zhang L
- Zhang S
- Zhang S
- Zhang Y
- Zhang Y
- Zhao Y
- Zharkova A
- Zhelezov A
- Zheng Y
- Zhou T
- Zhou X
- Zhou Y
- Zhovkovska V
- Zhu X
- Zhu X
- Zhu Z
- Zhukov V
- Zhuo J
- Zou Q
- Zucchelli S
- Zuliani D
- Zunica G
- Publication venue
- American Physical Society
- Publication date
- 01/10/2023
- Field of study
A flavor-tagged time-dependent angular analysis of the decay
B
0
s
â
Ï
Ï
is performed using
p
p
collision data collected by the LHCb experiment at the center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of
6
â
â
fb
â
1
. The
C
P
-violating phase and direct
C
P
-violation parameter are measured to be
Ï
s
ÂŻ
s
s
s
=
â
0.042
±
0.075
±
0.009
â
â
rad
and
|
λ
|
=
1.004
±
0.030
±
0.009
, respectively, assuming the same values for all polarization states of the
Ï
Ï
system. In these results, the first uncertainties are statistical and the second systematic. These parameters are also determined separately for each polarization state, showing no evidence for polarization dependence. The results are combined with previous LHCb measurements using
p
p
collisions at center-of-mass energies of 7 and 8 TeV, yielding
Ï
s
ÂŻ
s
s
s
=
â
0.074
±
0.069
â
â
rad
and
|
λ
|
=
1.009
±
0.030
. This is the most precise study of time-dependent
C
P
violation in a penguin-dominated
B
meson decay. The results are consistent with
C
P
symmetry and with the standard model predictions
Test of lepton universality in bâsâ+ââ decays
- Author
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- Abdelmotteleb ASW
- Abellan Beteta C
- Abudinén F
- Ackernley T
- Adeva B
- Adinolfi M
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- Craik DC
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- Da Silva CL
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- Geertsema RE
- Gerick D
- Gerken LL
- Gersabeck E
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- Gibson V
- Giemza HK
- Gilman AL
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- GioventĂč A
- Gironella Gironell P
- Giugliano C
- Giza MA
- Gizdov K
- Gkougkousis EL
- Gligorov VV
- Golobardes E
- Golubkov D
- Golutvin A
- Gomes A
- Gomez Fernandez S
- Goncalves Abrantes F
- Goncerz M
- Gong G
- Gorelov IV
- Gotti C
- Grabowski JP
- Grammatico T
- Granado Cardoso LA
- Graugés E
- Graverini E
- Graziani G
- Grecu AT
- Greeven LM
- Grieser NA
- Grillo L
- Gromov S
- Gruberg Cazon BR
- Gu C
- Guarise M
- Guittiere M
- Gushchin E
- Guth A
- Guz Y
- Gys T
- Göbel C
- GĂŒnther PA
- Hadavizadeh T
- Hadjivasiliou C
- Haefeli G
- Haen C
- Haimberger J
- Haines SC
- Halewood-Leagas T
- Halvorsen MM
- Hamilton PM
- Hammerich J
- Han Q
- Han X
- Hansmann-Menzemer S
- Hao L
- Harnew N
- Harrison T
- Hasse C
- Hatch M
- He J
- Heijhoff K
- Hemmer FH
- Henderson C
- Henderson RDL
- Hennequin AM
- Hennessy K
- Henry L
- Herd J
- Heuel J
- Hicheur A
- Hill D
- Hilton M
- Hollitt SE
- Horswill J
- Hou R
- Hou Y
- Hu J
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- Hu W
- Hu X
- Huang W
- Huang X
- Hulsbergen W
- Hunter RJ
- Hushchyn M
- Hutchcroft D
- Ibis P
- Idzik M
- Ilin D
- Ilten P
- Inglessi A
- Iniukhin A
- Ishteev A
- Ivshin K
- Jacobsson R
- Jage H
- Jaimes Elles SJ
- Jakobsen S
- Jans E
- Jashal BK
- Jawahery A
- Jevtic V
- Jiang E
- Jiang X
- Jiang Y
- John M
- Johnson D
- Jones CR
- Jones TP
- Joshi S
- Jost B
- Jurik N
- Juszczak I
- Kandybei S
- Kang Y
- Karacson M
- Karpenkov D
- Karpov M
- Kautz JW
- Keizer F
- Keller DM
- Kenzie M
- Ketel T
- Khanji B
- Kharisova A
- Kholodenko S
- Khreich G
- Kirn T
- Kirsebom VS
- Kitouni O
- Klaver S
- Kleijne N
- Klimaszewski K
- Kmiec MR
- Koliiev S
- Kolk L
- Kondybayeva A
- Konoplyannikov A
- Kopciewicz P
- Kopecna R
- Koppenburg P
- Korolev M
- Kostiuk I
- Kot O
- Kotriakhova S
- Kozachuk A
- Kravchenko P
- Kravchuk L
- Krawczyk RD
- Kreps M
- Kretzschmar S
- Krokovny P
- Krupa W
- Krzemien W
- Kubat J
- Kubis S
- Kucewicz W
- Kucharczyk M
- Kudryavtsev V
- Kulikova EK
- Kupsc A
- Lacarrere D
- Lafferty G
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- Lampis A
- Lancierini D
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- Lee SH
- Leflat A
- LefĂšvre R
- Legotin S
- Lemettais C
- Lenisa P
- Leroy O
- Lesiak T
- Leverington B
- LHCb Collaboration
- Li A
- Li H
- Li K
- Li P
- Li P-R
- Li S
- Li T
- Li T
- Li Y
- Li Z
- Liang X
- Lin C
- Lin T
- Lindner R
- Lisovskyi V
- Litvinov R
- Liu G
- Liu H
- Liu K
- Liu Q
- Liu S
- Lobo Salvia A
- Loi A
- Lollini R
- Lomba Castro J
- Longstaff I
- Lopes JH
- Lopez Huertas A
- Lovell GH
- Lu Y
- Lucarelli C
- Lucchesi D
- Luchuk S
- Lucio Martinez M
- Lukashenko V
- Luo Y
- Lupato A
- Luppi E
- Lusiani A
- Lynch K
- Lyu X-R
- López Soliño S
- Ma R
- Maccolini S
- Machefert F
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- Mackay I
- Macko V
- Madhan Mohan LR
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- Materok M
- Matev R
- Mathad A
- Matiunin V
- Matteuzzi C
- Mattioli KR
- Mauri A
- Maurice E
- Mauricio J
- Mazurek M
- McCann M
- Mcconnell L
- McGrath TH
- McHugh NT
- McNab A
- McNulty R
- Meadows B
- Meier G
- Melnychuk D
- Meloni S
- Merk M
- Merli A
- Meyer Garcia L
- Miao D
- Mikhasenko M
- Milanes DA
- Millard E
- Milovanovic M
- Minard M-N
- Minotti A
- Miralles T
- Mitchell SE
- Mitreska B
- Mitzel DS
- Modak A
- Mohammed RA
- Moise RD
- Mokhnenko S
- MombÀcher T
- Monk M
- Monroy IA
- Monteil S
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- Morello MJ
- Morgenthaler MP
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- Murray D
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- MĂŒller K
- Naik P
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- Nanut T
- Nasteva I
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- Neubert S
- Neufeld N
- Neustroev P
- Newcombe R
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- Nicotra D
- Niel EM
- Nieswand S
- Nikitin N
- Nolte NS
- Normand C
- Novoa Fernandez J
- Nowak G
- Nunez C
- O'Neil RH
- Oblakowska-Mucha A
- Obraztsov V
- Oeser T
- Okamura S
- Oldeman R
- Oliva F
- Onderwater CJG
- Otalora Goicochea JM
- Ovsiannikova T
- Owen P
- Oyanguren A
- Ozcelik O
- Padeken KO
- Pagare B
- Pais PR
- Pajero T
- Palano A
- Palutan M
- Panshin G
- Paolucci L
- Papanestis A
- Pappagallo M
- Pappalardo LL
- Pappenheimer C
- Parker W
- Parkes C
- Passalacqua B
- Passaleva G
- Pastore A
- Patel M
- Patrignani C
- Pawley CJ
- Pellegrino A
- Pepe Altarelli M
- Perazzini S
- Pereima D
- Pereiro Castro A
- Perret P
- Petridis K
- Petrolini A
- Petrucci S
- Petruzzo M
- Pham H
- Philippov A
- Piandani R
- Pica L
- Piccini M
- Pietrzyk B
- Pietrzyk G
- Pili M
- Pinci D
- Pisani F
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- Placinta V
- Plews J
- Plo Casasus M
- Polci F
- Poli Lener M
- Poluektov A
- Polukhina N
- Polyakov I
- Polycarpo E
- Ponce S
- Popov D
- Poslavskii S
- Prasanth K
- Promberger L
- Prouve C
- Pugatch V
- Puill V
- Punzi G
- Qi HR
- Qian W
- Qin N
- Qu S
- Quagliani R
- Raab NV
- Rachwal B
- Rademacker JH
- Rajagopalan R
- Rama M
- Ramos Pernas M
- Rangel MS
- Ratnikov F
- Raven G
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- Redi F
- Reich J
- Reiss F
- Remon Alepuz C
- Ren Z
- Resmi PK
- Ribatti R
- Ricci AM
- Ricciardi S
- Richardson K
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- Rinnert K
- Robbe P
- Robertson G
- Rodrigues E
- Rodriguez Fernandez E
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- Rolf DL
- Rollings A
- Roloff P
- Romanovskiy V
- Romero Lamas M
- Romero Vidal A
- Roth JD
- Rotondo M
- Rudolph MS
- Ruf T
- Ruiz Fernandez RA
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- Ryzhikov A
- Ryzka J
- Saborido Silva JJ
- Sagidova N
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- Saitta B
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- Shchemerov I
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- Westhenry BDC
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- Wiederhold AR
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- Wilkinson G
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- Williams R
- Wilson FF
- Wislicki W
- Witek M
- Witola L
- Wong CP
- Wormser G
- Wotton SA
- Wu H
- Wu J
- Wyllie K
- Xiang Z
- Xie Y
- Xu A
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- Xu M
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- Xu Z
- Yang D
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- Yang Y
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- Yeomans LE
- Yeroshenko V
- Yeung H
- Yin H
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- Zaffaroni E
- Zavertyaev M
- Zdybal M
- Zeng M
- Zhang C
- Zhang D
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- Zhang S
- Zhang Y
- Zhang Y
- Zhao Y
- Zharkova A
- Zhelezov A
- Zheng Y
- Zhou T
- Zhou X
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- Zhovkovska V
- Zhu X
- Zhu X
- Zhu Z
- Zhukov V
- Zou Q
- Zucchelli S
- Zuliani D
- Zunica G
- Publication venue
- American Physical Society
- Publication date
- 20/12/2022
- Field of study
The first simultaneous test of muon-electron universality using
B
+
â
K
+
â
+
â
â
and
B
0
â
K
*
0
â
+
â
â
decays is performed, in two ranges of the dilepton invariant-mass squared,
q
2
. The analysis uses beauty mesons produced in proton-proton collisions collected with the LHCb detector between 2011 and 2018, corresponding to an integrated luminosity of
9
â
â
fb
â
1
. Each of the four lepton universality measurements reported is either the first in the given
q
2
interval or supersedes previous LHCb measurements. The results are compatible with the predictions of the Standard Model
- âŠ