70 research outputs found
Beyond the Standard Model Searches at the LHC
This report presents recent results from studies of Beyond the Standard Model
physics at the LHC. A focus is placed on heavy gauge bosons, electroweak
symmetry breaking and left-right symmetry.Comment: Submitted to ICHEP06 proceeding
Electroweak and Heavy Flavor Physics at SLD
We review recent electroweak and B physics results obtained in polarized e+e-
interactions at the SLC by the SLD experiment. Unique and precise measurements
of the electroweak parameters Ae, Ab, Ac, Rb and Rc provide powerful
constraints on the Standard Model. The excellent 3-D vertexing capabilities of
SLD are further exploited to extract precise B+ and B0 lifetimes, as well as
measurements of the time evolution of B0-B0-bar mixing.Comment: 11 pages, 5 figures. Presented at the Workshop on Physics at the
First Muon Collider and at the Front End of a Muon Collider, 6-9 November
1997, Fermilab, Batavia, I
A Review of Bs Mixing: Past, Present and Future
We review the experimental status of Bs mixing. After a brief historical
overview, current studies of the time dependence of Bs oscillations are
described, with an emphasis on the different experimental techniques used by
the ALEPH, CDF, DELPHI, OPAL, and SLD Collaborations. To conclude, the outlook
for future experiments is presented.Comment: Paper submitted to proceedings of the 3rd International Conference on
B Physics and CP Violation, Taipei, Dec.3-7, 1999; 8 pages, 4 figure
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Observation of the Îł Îł â Ï Ï Process in Pb + Pb Collisions and Constraints on the Ï -Lepton Anomalous Magnetic Moment with the ATLAS Detector
in the Standard Model with Flavor Symmetry
The observed branching ratios for decays are much larger than
factorization predictions in the Standard Model (SM). Many proposals have been
made to reconcile the data and theoretical predictions. In this paper we study
these decays within the SM using flavor U(3) symmetry. If small annihilation
amplitudes are neglected, one needs 11 hadronic parameters to describe decays where can be one of the , , and nonet
mesons. We find that existing data are consistent with SM with flavor U(3)
symmetry. We also predict several measurable branching ratios and CP
asymmetries for , decays.
Near future experiments can provide important tests for the Standard Model with
flavor U(3) symmetry.Comment: 13 pages, 4 table
Combined results on b-hadron production rates and decay properties
Combined results on b-hadron lifetimes, b-hadron production rates, B^0_d - \bar{B^0_d} and B^0_S - \bar{B^0_s} oscillations, the decay width difference between the mass eigenstates of the B^0_s - \bar{B^0_s} system, the average number of c and \bar{c} quarks in b-hadron decays, and searches for CP violation in the B^0_d - \bar{B-0_d} system are presented. They have been obtained from published and preliminary measurements available in Summer 2000 from the ALEPH, CDF, DELPHI, L3, OPAL and SLD Collaborations. These results have been used to determine the parameters of the CKM unitarity triangle
Combined results on b-hadron production rates, lifetimes, oscillations and semileptonic decays
Combined results on b-hadron lifetimes, b-hadron production rates, B&0_d - Bbar^0_d and B^0_s - Bbar^0_s oscillations, the decay width difference between the mass eigenstates of the B^s0_s - Bbar^0_s system, and the values of the CK
Report from Working Group 3: Beyond the standard model physics at the HL-LHC and HE-LHC
This is the third out of five chapters of the final report [1] of the Workshop on Physics at HL-LHC, and perspectives on HE-LHC [2]. It is devoted to the study of the potential, in the search for Beyond the Standard Model (BSM) physics, of the High Luminosity (HL) phase of the LHC, defined as ab of data taken at a centre-of-mass energy of 14 TeV, and of a possible future upgrade, the High Energy (HE) LHC, defined as ab of data at a centre-of-mass energy of 27 TeV. We consider a large variety of new physics models, both in a simplified model fashion and in a more model-dependent one. A long list of contributions from the theory and experimental (ATLAS, CMS, LHCb) communities have been collected and merged together to give a complete, wide, and consistent view of future prospects for BSM physics at the considered colliders. On top of the usual standard candles, such as supersymmetric simplified models and resonances, considered for the evaluation of future collider potentials, this report contains results on dark matter and dark sectors, long lived particles, leptoquarks, sterile neutrinos, axion-like particles, heavy scalars, vector-like quarks, and more. Particular attention is placed, especially in the study of the HL-LHC prospects, to the detector upgrades, the assessment of the future systematic uncertainties, and new experimental techniques. The general conclusion is that the HL-LHC, on top of allowing to extend the present LHC mass and coupling reach by on most new physics scenarios, will also be able to constrain, and potentially discover, new physics that is presently unconstrained. Moreover, compared to the HL-LHC, the reach in most observables will, generally more than double at the HE-LHC, which may represent a good candidate future facility for a final test of TeV-scale new physics
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