Search for new physics in events with same-sign dileptons and b jets in pp collisions at root s=8 TeV

A search for new physics is performed using events with isolated same-sign leptons and at least two bottom-quark jets in the final state. Results are based on a sample of proton-proton collisions collected at a center-of-mass energy of 8TeV with the CMS detector and corresponding to an integrated luminosity of 10.5 fb(-1). No excess above the standard model background is observed. Upper limits are set on the number of events from non-standard-model sources and are used to constrain a number of new physics models. Information on acceptance and efficiencies is also provided so that the results can be used to confront an even broader class of new physics models

Search for supersymmetry in final states with missing transverse energy and 0, 1, 2, or >= 3 b-quark jets in 7 TeV pp collisions using the variable alpha(T)

A search for supersymmetry in final states with jets and missing transverse energy is performed in pp collisions at a centre-of-mass energy of root s = 7 TeV. The data sample corresponds to an integrated luminosity of 4.98 fb(-1) collected by the CMS experiment at the LHC. In this search, a dimensionless kinematic variable, alpha(T), is used as the main discriminator between events with genuine and misreconstructed missing transverse energy. The search is performed in a signal region that is binned in the scalar sum of the transverse energy of jets and the number of jets identified as originating from a bottom quark. No excess of events over the standard model expectation is found. Exclusion limits are set in the parameter space of the constrained minimal supersymmetric extension of the standard model, and also in simplified models, with a special emphasis on compressed spectra and third-generation scenarios

Measurement of the production cross section for Z gamma -> nu(nu)over-bar gamma in pp collisions at root s=7 TeV and limits on ZZ gamma and Z gamma gamma triple gauge boson couplings

A measurement of the Z gamma -> nu(nu) over bar gamma cross section in pp collisions at root s = 7 TeV is presented, using data corresponding to an integrated luminosity of 5.0 fb(-1) collected with the CMS detector. This measurement is based on the observation of events with an imbalance of transverse energy in excess of 130 GeV and a single photon in the absolute pseudorapidity range vertical bar eta vertical bar nugamma production cross section is measured to be 21.1 +/- 4.2(stat.)+/- 4.3(syst.)+/- 0.5(lum.)fb, which agrees with the standard model prediction of 21.9 +/- 1.1 fb. The results are combined with the CMS measurement of Z gamma production in the l(+)l(-)gamma final state (where l is an electron or a muon) to yield the most stringent limits to date on triple gauge boson couplings. vertical bar h(3)(Z)vertical bar < 2.7 x 10(-3), vertical bar h(4)(Z)vertical bar < 1.3 x 10(-5) for ZZ gamma and vertical bar h(3)(gamma)vertical bar < 2.9 x 10(-3), vertical bar h(4)(gamma)vertical bar < 1.5 x 10(-5) for Z gamma gamma couplings.Austrian de la Recherche ScientifiqueFonds voor Wetenschappelijk OnderzoekConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)Fundação de Amparo à Pesquisa do Estado do Rio de Janeiro (FAPERJ)Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Bulgarian Ministry of Education and ScienceCERNChinese Academy of SciencesMinistry of Science and TechnologyNational Natural Science Foundation of ChinaColombian Funding Agency (COLCIENCIAS)Croatian Ministry of Science, Education and SportResearch Promotion Foundation, CyprusMinistry of Education and ResearchEuropean Regional Development Fund, EstoniaAcademy of FinlandFinnish Ministry of Education and CultureHelsinki Institute of PhysicsInstitut National de Physique Nucleaire et de Physique des Particules / CNRSCommissariat a l'Energie Atomique et aux Energies Alternatives / CEA, FranceBundesministerium fur Bildung und ForschungDeutsche ForschungsgemeinschaftHelmholtz-Gemeinschaft Deutscher Forschungszentren, GermanyGeneral Secretariat for Research and Technology, GreeceNational Scientific Research FoundationNational Office for Research and Technology, HungaryDepartment of Atomic EnergyDepartment of Science and Technology, IndiaInstitute for Studies in Theoretical Physics and Mathematics, IranScience Foundation, IrelandIstituto Nazionale di Fisica Nucleare, ItalyKorean Ministry of Education, Science and TechnologyWorld Class University program of NRF, Republic of KoreaLithuanian Academy of SciencesCINVESTAVCONACYTSEPUASLP-FAIMinistry of Business, Innovation and Employment, New ZealandPakistan Atomic Energy CommissionMinistry of Science and Higher EducationNational Science Centre, PolandFundacao para a Ciencia e a Tecnologia, PortugalJINR, DubnaMinistry of Education and Science of the Russian FederationFederal Agency of Atomic Energy of the Russian FederationRussian Academy of SciencesRussian Foundation for Basic ResearchMinistry of Education, Science and Technological Development of SerbiaSecretaria de Estado de Investigacion, Desarrollo e InnovacionPrograma Consolider-Ingenio, SpainETH BoardETH ZurichPSISNFUniZHCanton ZurichSERNational Science Council, TaipeiThailand Center of Excellence in PhysicsInstitute for the Promotion of Teaching Science and Technology of ThailandSpecial Task Force for Activating ResearchNational Science and Technology Development Agency of ThailandScientific and Technical Research Council of TurkeyTurkish Atomic Energy AuthorityScience and Technology Facilities Council, U.K.US Department of EnergyUS National Science FoundationMarie-Curie programmeEuropean Research CouncilEPLANET (European Union)Leventis FoundationA. P. Sloan FoundationAlexander von Humboldt FoundationBelgian Federal Science Policy OfficeFonds pour la Formation a la Recherche dans l'Industrie et dans l'Agriculture (FRIA-Belgium)Agentschap voor Innovatie door Wetenschap en Technologie (IWT-Belgium)Ministry of Education, Youth and Sports (MEYS) of Czech RepublicCouncil of Science and Industrial Research, IndiaCompagnia di San Paolo (Torino)HOMING PLUS programme of Foundation for Polish ScienceEU, Regional Development FundThalis and Aristeia programmesEU-ESFGreek NSRFYerevan Phys Inst, Yerevan 375036, ArmeniaOeAW, Inst Hochenergiephys, Vienna, AustriaNatl Ctr Particle & High Energy Phys, Minsk, ByelarusUniv Antwerp, B-2020 Antwerp, BelgiumVrije Univ Brussel, Brussels, BelgiumUniv Libre Brussels, Brussels, BelgiumUniv Ghent, B-9000 Ghent, BelgiumCatholic Univ Louvain, B-1348 Louvain, BelgiumUniv Mons, B-7000 Mons, BelgiumCtr Brasileiro Pesquisas Fis, Rio De Janeiro, BrazilUniv Estado Rio de Janeiro, BR-20550011 Rio De Janeiro, BrazilUniv Estadual Paulista, Sao Paulo, BrazilUniv Fed ABC, Sao Paulo, BrazilBulgarian Acad Sci, Inst Nucl Res & Nucl Energy, Sofia, BulgariaUniv Sofia, BU-1126 Sofia, BulgariaInst High Energy Phys, Beijing 100039, Peoples R ChinaPeking Univ, State Key Lab Nucl Phys & Technol, Beijing 100871, Peoples R ChinaUniv Los Andes, Bogota, ColombiaTech Univ Split, Split, CroatiaUniv Split, Split, CroatiaRudjer Boskovic Inst, Zagreb, CroatiaUniv Cyprus, Nicosia, CyprusCharles Univ Prague, Prague, Czech RepublicAcad Sci Res & Technol Arab Republ Egypt, Egyptian Network High Energy Phys, Cairo, EgyptNICPB, Tallinn, EstoniaUniv Helsinki, Dept Phys, Helsinki, FinlandHelsinki Inst Phys, Helsinki, FinlandLappeenranta Univ Technol, Lappeenranta, FinlandCEA Saclay, DSM IRFU, Gif Sur Yvette, FranceEcole Polytech, CNRS, IN2P3, Lab LeprinceRinguet, F-91128 Palaiseau, FranceUniv Haute Alsace Mulhouse, Univ Strasbourg, Inst Pluridisciplinaire Hubert Curien, CNRS,IN2P3, Strasbourg, FranceCNRS, IN2P3, Inst Natl Phys Nucl Phys Particules, Ctr Calcul, Villeurbanne, FranceUniv Lyon 1, CNRS, IN2P3, Inst Phys Nucl Lyon, F-69622 Villeurbanne, FranceTbilisi State Univ, Inst High Energy Phys & Informatizat, GE-380086 Tbilisi, Rep of GeorgiaRhein Westfal TH Aachen, Inst Phys 1, Aachen, GermanyRhein Westfal TH Aachen, Phys Inst A3, Aachen, GermanyRhein Westfal TH Aachen, Phys Inst B3, Aachen, GermanyDESY, Hamburg, GermanyUniv Hamburg, Hamburg, GermanyUniv Karlsruhe, Inst Expt Kernphys, Karlsruhe, GermanyNCSR Demokritos, INPP, Aghia Paraskevi, GreeceUniv Athens, Athens, GreeceUniv Ioannina, GR-45110 Ioannina, GreeceKFKI Res Inst Particle & Nucl Phys, Budapest, HungaryInst Nucl Res ATOMKI, Debrecen, HungaryDebrecen Univ Med, H-4012 Debrecen, HungaryNatl Inst Sci Educ & Res, Bhubaneswar, Orissa, IndiaPanjab Univ, Chandigarh 160014, IndiaUniv Delhi, Delhi 110007, IndiaSaha Inst Nucl Phys, Kolkata, IndiaBhabha Atom Res Ctr, Bombay 400085, Maharashtra, IndiaTata Inst Fundamental Res EHEP, Bombay, Maharashtra, IndiaTata Inst Fundamental Res HECR, Bombay, Maharashtra, IndiaInst Res Fundamental Sci IPM, Tehran, IranUniv Coll Dublin, Dublin 2, IrelandIst Nazl Fis Nucl, Sez Bari, I-70126 Bari, ItalyUniv Bari, Bari, ItalyPolitecn Bari, Bari, ItalyIst Nazl Fis Nucl, Sez Bologna, I-40126 Bologna, ItalyUniv Bologna, Bologna, ItalyIst Nazl Fis Nucl, Sez Catania, I-95129 Catania, ItalyUniv Catania, Catania, ItalyIst Nazl Fis Nucl, Sez Firenze, I-50125 Florence, ItalyUniv Florence, Florence, ItalyIst Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, ItalyIst Nazl Fis Nucl, Sez Genova, I-16146 Genoa, ItalyUniv Genoa, Genoa, ItalyIst Nazl Fis Nucl, Sez Milano Bicocca, I-20133 Milan, ItalyUniv Milano Bicocca, Milan, ItalyIst Nazl Fis Nucl, Sez Napoli, I-80125 Naples, ItalyUniv Naples Federico II, Naples, ItalyUniv Basilicata Potenza, Naples, ItalyUniv G Marconi Roma, Naples, ItalyIst Nazl Fis Nucl, Sez Padova, Padua, ItalyUniv Padua, Padua, ItalyUniv Trento Trento, Padua, ItalyIst Nazl Fis Nucl, Sez Pavia, I-27100 Pavia, ItalyUniv Pavia, I-27100 Pavia, ItalyIst Nazl Fis Nucl, Sez Perugia, I-06100 Perugia, ItalyUniv Perugia, I-06100 Perugia, ItalyIst Nazl Fis Nucl, Sez Pisa, Pisa, ItalyUniv Pisa, Pisa, ItalyScuola Normale Super Pisa, Pisa, ItalyIst Nazl Fis Nucl, Sez Roma, Rome, ItalyUniv Rome, Rome, ItalyIst Nazl Fis Nucl, Sez Torino, I-10125 Turin, ItalyUniv Turin, Turin, ItalyUniv Piemonte Orientale Novara, Turin, ItalyIst Nazl Fis Nucl, Sez Trieste, Trieste, ItalyUniv Trieste, Trieste, ItalyKangwon Natl Univ, Chunchon, South KoreaKyungpook Natl Univ, Taegu, South KoreaChonnam Natl Univ, Inst Universe & Elementary Particles, Kwangju, South KoreaKorea Univ, Seoul, South KoreaUniv Seoul, Seoul, South KoreaSungkyunkwan Univ, Suwon, South KoreaVilnius State Univ, Vilnius, LithuaniaIPN, Ctr Invest & Estudios Avanzados, Mexico City 07738, DF, MexicoUniv Iberoamer, Mexico City, DF, MexicoBenemerita Univ Autonoma Puebla, Puebla, MexicoUniv Autonoma San Luis Potosi, San Luis Potosi, MexicoUniv Auckland, Auckland 1, New ZealandUniv Canterbury, Christchurch 1, New ZealandQuaid I Azam Univ, Natl Ctr Phys, Islamabad, PakistanNatl Ctr Nucl Res, Otwock, PolandUniv Warsaw, Inst Expt Phys, Fac Phys, Warsaw, PolandLab Instrumentacao & Fis Expt Particulas, Lisbon, PortugalJoint Inst Nucl Res, Dubna, RussiaPetersburg Nucl Phys Inst, St Petersburg, RussiaRussian Acad Sci, Inst Nucl Res, Moscow 117312, RussiaInst Theoret & Expt Phys, Moscow 117259, RussiaPN Lebedev Phys Inst, Moscow 117924, RussiaMoscow MV Lomonosov State Univ, Skobeltsyn Inst Nucl Phys, Moscow, RussiaState Res Ctr Russian Federat, Inst High Energy Phys, Protvino, RussiaUniv Belgrade, Fac Phys, Belgrade 11001, SerbiaVinca Inst Nucl Sci, Belgrade, SerbiaCIEMAT, E-28040 Madrid, SpainUniv Autonoma Madrid, Madrid, SpainUniv Oviedo, Oviedo, SpainUniv Cantabria, CSIC, Inst Fis Cantabria IFCA, E-39005 Santander, SpainCERN, European Org Nucl Res, CH-1211 Geneva, SwitzerlandPaul Scherrer Inst, Villigen, SwitzerlandSwiss Fed Inst Technol, Inst Particle Phys, Zurich, SwitzerlandUniv Zurich, Zurich, SwitzerlandNatl Cent Univ, Chungli 32054, TaiwanNatl Taiwan Univ, Taipei 10764, TaiwanChulalongkorn Univ, Bangkok, ThailandCukurova Univ, Adana, TurkeyMiddle E Tech Univ, Dept Phys, TR-06531 Ankara, TurkeyBogazici Univ, Istanbul, TurkeyIstanbul Tech Univ, TR-80626 Istanbul, TurkeyNatl Sci Ctr, Kharkov Inst Phys & Technol, Kharkov, UkraineUniv Bristol, Bristol, Avon, EnglandRutherford Appleton Lab, Didcot OX11 0QX, Oxon, EnglandUniv London Imperial Coll Sci Technol & Med, London, EnglandBrunel Univ, Uxbridge UB8 3PH, Middx, EnglandBaylor Univ, Waco, TX 76798 USAUniv Alabama, Tuscaloosa, AL USABoston Univ, Boston, MA 02215 USABrown Univ, Providence, RI 02912 USAUniv Calif Davis, Davis, CA 95616 USAUniv Calif Los Angeles, Los Angeles, CA USAUniv Calif Riverside, Riverside, CA 92521 USAUniv Calif San Diego, La Jolla, CA 92093 USAUniv Calif Santa Barbara, Santa Barbara, CA 93106 USACALTECH, 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TurkeyTexas A&M Univ Qatar, Doha, QatarUniv Estadual Paulista, Sao Paulo, BrazilMinistry of Education and ResearchSF0690030s0

Search for new physics in events with same-sign dileptons and b jets in pp collisions at root s=8 TeV

A search for new physics is performed using events with isolated same-sign leptons and at least two bottom-quark jets in the final state. Results are based on a sample of proton-proton collisions collected at a center-of-mass energy of 8TeV with the CMS detector and corresponding to an integrated luminosity of 10.5 fb(-1). No excess above the standard model background is observed. Upper limits are set on the number of events from non-standard-model sources and are used to constrain a number of new physics models. Information on acceptance and efficiencies is also provided so that the results can be used to confront an even broader class of new physics models

Measurement of the production cross section for Z gamma -> nu(nu)over-bar gamma in pp collisions at root s=7 TeV and limits on ZZ gamma and Z gamma gamma triple gauge boson couplings

Submitted to JHEP ; see paper for full list of authorsA measurement of the Z gamma to nu nu-bar gamma cross section in pp collisions at sqrt(s) = 7 TeV is presented, using data corresponding to an integrated luminosity of 5.0 inverse femtobarns collected with the CMS detector. This measurement is based on the observation of events with an imbalance of transverse energy in excess of 130 GeV and a single photon in the absolute pseudorapidity range abs(eta) < 1.4 with transverse energy above 145 GeV. The Z gamma to nu nu-bar gamma production cross section is measured to be 21.1 +/- 4.2 (stat.) +/- 4.3 (syst.) +/- 0.5 (lum.) fb, which agrees with the standard model prediction of 21.9 +/- 1.1 fb. The results are combined with the CMS measurement of Z gamma production in the l+ l- gamma final state (where l is an electron or a muon) to yield the most stringent limits to date on triple gauge boson couplings: abs(h[3,Z]) < 2.7E-3, abs(h[4,Z]) < 1.3E-5 for Z Z gamma and abs(h[3,gamma]) < 2.9E-3, abs(h[4,gamma]) < 1.5E-5 for Z gamma gamma couplings

Search for leptonic decays of W ' bosons in pp collisions at root s=7TeV

A search for a new heavy gauge boson W′ decaying to an electron or muon, plus a low mass neutrino, is presented. This study uses data corresponding to an integrated luminosity of 5.0 fb -1, collected using the CMS detector in pp collisions at a centre-of-mass energy of 7 TeV at the LHC. Events containing a single electron or muon and missing transverse momentum are analyzed. No significant excess of events above the standard model expectation is found in the transverse mass distribution of the lepton-neutrino system, and upper limits for cross sections above different transverse mass thresholds are presented. W′ Mass exclusion limits at 95% CL for a range of W′ models are determined, including a limit of 2.5 TeV for right-handed W bosons with standard-model-like couplings and limits W′ 2.43-2.63 TeV for left-handed W′ bosons, taking into account their interference with the standard model W boson. Exclusion limits have also been set on Kaluza-Klein WKK states in the framework of split universal extra dimensions.0info:eu-repo/semantics/publishedCMS Collaboratio