Search for physics beyond the standard model in dilepton mass spectra in proton-proton collisions at root s=8 TeV

C. Albajar; V. Khachatryan; M. Missiroli; D. Moran; J. F. Trocóniz; The Collaboration Cms; CMS Collaboration; John Chou

doi:10.1007/JHEP04(2015)025

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P. Sloan Foundation Alexander von Humboldt Foundation Belgian Federal Science Policy Office Fonds 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 the Czech Republic Council of Science and Industrial Research, India HOMING PLUS programme of Foundation for Polish Science European Union Regional Development Fund Compagnia di San Paolo (Torino) Consorzio per la Fisica (Trieste) MIUR (Italy) Thalis programme Aristeia programme EU-ESF Greek NSRF National Priorities Research Program by Qatar National Research Fund Dimuon and dielectron mass spectra, obtained from data resulting from protonproton collisions at 8TeV and recorded by the CMS experiment, are used to search for both narrow resonances and broad deviations from standard model predictions. The data correspond to an integrated luminosity of 20.6 (19.7) fb(-1) for the dimuon (dielectron) channel. No evidence for non-standard-model physics is observed and 95% confidence level limits are set on parameters from a number of new physics models. The narrow resonance analyses exclude a Sequential Standard Model Z(SSM)' resonance lighter than 2.90TeV, a superstring-inspired Z(psi)' lighter than 2.57TeV, and Randall-Sundrum Kaluza-Klein gravitons with masses below 2.73, 2.35, and 1.27TeV for couplings of 0.10, 0.05, and 0.01, respectively. A notable feature is that the limits have been calculated in a model-independent way to enable straightforward reinterpretation in any model predicting a resonance structure. The observed events are also interpreted within the framework of two non-resonant analyses: one based on a large extra dimensions model and one based on a quark and lepton compositeness model with a left-left isoscalar contact interaction. Lower limits are established on M-S, the scale characterizing the onset of quantum gravity, which range from 4.9 to 3.3TeV, where the number of additional spatial dimensions varies from 3 to 7. Similarly, lower limits on Lambda, the energy scale parameter for the contact interaction, are found to be 12.0 (15.2) TeV for destructive (constructive) interference in the dimuon channel and 13.5 (18.3) TeV in the dielectron channel. Yerevan Phys Inst, Yerevan 375036, Armenia OeAW, Inst Hochenergiephys, Vienna, Austria Natl Ctr Particle & High Energy Phys, Minsk, Byelarus Univ Antwerp, B-2020 Antwerp, Belgium Vrije Univ Brussel, Brussels, Belgium Univ Libre Bruxelles, Brussels, Belgium Univ Ghent, B-9000 Ghent, Belgium Catholic Univ Louvain, Louvain La Neuve, Belgium Univ Mons, B-7000 Mons, Belgium Ctr Brasileiro Pesquisas Fis, Rio De Janeiro, Brazil Univ Estado Rio de Janeiro, BR-20550011 Rio De Janeiro, Brazil Univ Estadual Paulista, Sao Paulo, Brazil Univ Fed ABC, Sao Paulo, Brazil Inst Nucl Energy Res, Sofia, Bulgaria Univ Sofia, BU-1126 Sofia, Bulgaria Inst High Energy Phys, Beijing 100039, Peoples R China Peking Univ, State Key Lab Nucl Phys & Technol, Beijing 100871, Peoples R China Univ Los Andes, Bogota, Colombia Univ Split, Fac Elect Engn Mech Engn & Naval Architecture, Split, Croatia Univ Split, Fac Sci, Split, Croatia Rudjer Boskovic Inst, Zagreb, Croatia Univ Cyprus, CY-1678 Nicosia, Cyprus Charles Univ Prague, Prague, Czech Republic Acad Sci Res & Technol Arab Republ Egypt, Egyptian Network High Energy Phys, Cairo, Egypt NICPB, Tallinn, Estonia Univ Helsinki, Dept Phys, Helsinki, Finland Helsinki Inst Phys, Helsinki, Finland Lappeenranta Univ Technol, Lappeenranta, Finland CEA Saclay, DSM IRFU, F-91191 Gif Sur Yvette, France Ecole Polytech, CNRS, IN2P3, Lab Leprince Ringuet, F-91128 Palaiseau, France Univ Strasbourg, Univ Haute Alsace Mulhouse, CNRS, Inst Pluridisciplinaire Hubert Curien,IN2P3, Strasbourg, France CNRS, IN2P3, Ctr Calcul, Villeurbanne, France Univ Lyon 1, CNRS, IN2P3, Inst Phys Nucl Lyon, F-69622 Villeurbanne, France Tbilisi State Univ, Inst High Energy Phys & Informatizat, Tbilisi, Rep of Georgia Rhein Westfal TH Aachen, Inst Phys 1, Aachen, Germany Rhein Westfal TH Aachen, Inst Phys 3A, Aachen, Germany Rhein Westfal TH Aachen, Inst Phys 3B, Aachen, Germany DESY, Hamburg, Germany Univ Hamburg, Hamburg, Germany Univ Karlsruhe, Inst Expt Kernphys, Karlsruhe, Germany NCSR Demokritos, Inst Nucl & Particle Phys, Aghia Paraskevi, Greece Univ Athens, Athens, Greece Univ Ioannina, GR-45110 Ioannina, Greece Wigner Res Ctr Phys, Budapest, Hungary Inst Nucl Res ATOMKI, Debrecen, Hungary Debrecen Univ Med, H-4012 Debrecen, Hungary Natl Inst Sci Educ & Res, Bhubaneswar, Orissa, India Panjab Univ, Chandigarh 160014, India Univ Delhi, Delhi, India Saha Inst Nucl Phys, Kolkata, India Bhabha Atom Res Ctr, Bombay 400085, Maharashtra, India Tata Inst Fundamental Res, Bombay 400005, Maharashtra, India Inst Res Fundamental Sci IPM, Tehran, Iran Univ Coll Dublin, Dublin 2, Ireland Ist Nazl Fis Nucl, Sez Bari, I-70126 Bari, Italy Univ Bari, Bari, Italy Politecn Bari, Bari, Italy Ist Nazl Fis Nucl, Sez Bologna, I-40126 Bologna, Italy Univ Bologna, Bologna, Italy Ist Nazl Fis Nucl, Sez Catania, I-95129 Catania, Italy Univ Catania, Catania, Italy CSFNSM, Catania, Italy Ist Nazl Fis Nucl, Sez Firenze, I-50125 Florence, Italy Univ Florence, Florence, Italy Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy Ist Nazl Fis Nucl, Sez Genova, I-16146 Genoa, Italy Univ Genoa, Genoa, Italy Ist Nazl Fis Nucl, Sez Milano Bicocca, I-20133 Milan, Italy Univ Milano Bicocca, Milan, Italy Ist Nazl Fis Nucl, Sez Napoli, I-80125 Naples, Italy Univ Naples Federico II, Naples, Italy Univ Basilicata Potenza, Naples, Italy Univ G Marconi Roma, Naples, Italy Ist Nazl Fis Nucl, Sez Padova, Padua, Italy Univ Padua, Padua, Italy Univ Trento, Padua, Italy Ist Nazl Fis Nucl, Sez Pavia, I-27100 Pavia, Italy Univ Pavia, I-27100 Pavia, Italy Ist Nazl Fis Nucl, Sez Perugia, I-06100 Perugia, Italy Univ Perugia, I-06100 Perugia, Italy Ist Nazl Fis Nucl, Sez Pisa, Pisa, Italy Univ Pisa, Pisa, Italy Scuola Normale Super Pisa, Pisa, Italy Ist Nazl Fis Nucl, Sez Roma, Rome, Italy Univ Rome, Rome, Italy Ist Nazl Fis Nucl, Sez Torino, I-10125 Turin, Italy Univ Turin, Turin, Italy Univ Piemonte Orientale Novara, Turin, Italy Ist Nazl Fis Nucl, Sez Trieste, Trieste, Italy Univ Trieste, Trieste, Italy Kangwon Natl Univ, Chunchon, South Korea Kyungpook Natl Univ, Daegu, South Korea Chonbuk Natl Univ, Jeonju 561756, South Korea Chonnam Natl Univ, Inst Universe & Elementary Particles, Kwangju, South Korea Korea

Search for physics beyond the standard model in dilepton mass spectra in proton-proton collisions at root s=8 TeV

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