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| 題名: | Search for physics beyond the standard model in dilepton mass spectra in proton-proton collisions at √s=8TeV |
| 作者: | 余欣珊;Suarez Gonzalez, J.;Bansal, S.;Cornelis, T.;De Wolf, E. A.;Van Spilbeeck, A.;Daci, N.;Fonseca De Souza, S.;Stoykova, S.;Brigljevic, V.;Kinnunen, R.;Tuuva, T.;Gras, P.;Carrillo Montoya, C. A.;Chierici, R.;Fan, J.;Ille, B.;Perieanu, A.;Eckerlin, G.;Eckstein, D.;Perrey, H.;Schettler, H.;Dierlamm, A.;Kuznetsova, E.;Nürnberg, A.;Markou, A.;Malhotra, S.;Dutta, D.;Behnamian, H.;Radogna, R.;Cavallo, F. R.;Giacomelli, P.;Tosi, N.;Chiorboli, M.;Potenza, R.;Civinini, C.;Tropiano, A.;Pedrini, D.;Dosselli, U.;Meneguzzo, A. T.;Tonelli, G.;Vernieri, C.;Pinna Angioni, G. L.;Hong, B.;Park, S. K.;Pedraza, I.;Kalinowski, A.;Popov, V.;Krychkine, V.;Petrov, V.;Rekovic, V.;Calvo, E.;Chamizo Llatas, M.;Garcia-Abia, P.;de Trocóniz, J. F.;Cuevas, J.;Calderon, A.;Rodríguez-Marrero, A. Y.;Bocci, A.;Bondu, O.;Dupont-Sagorin, N.;Mannelli, M.;Perez, E.;Petrilli, A.;Petrucciani, G.;Plagge, M.;Chen, P. H.;Levchuk, L.;Futyan, D.;Farrell, C.;Simon, S.;Tadel, M.;Tu, Y.;Campagnari, C.;Gouskos, L.;Bunn, J.;Newman, H. B.;Thom, J.;Gottschalk, E.;Joshi, U.;Merkel, P.;Mrenna, S.;Bortignon, P.;Fisher, M.;Low, J. F.;Matchev, K.;Rodriguez, J. L.;Khalatyan, S.;Onel, Y.;Zhukova, V.;Claes, D. R.;Won, S.;Hart, A.;Smith, G.;Demina, R.;Ferbel, T.;Ferencek, D.;Patel, R.;Thomassen, P.;Lazaridis, C.;Levine, A. |
| 貢獻者: | 理學院物理學系 |
| 關鍵詞: | beyond standard model;Classical and Quantum Gravitation;Elementary Particles;hadron-hadron scattering;particle and resonance production;Physics;Physics and Astronomy;Quantum Field Theories;Quantum Field Theory;Quantum Physics;Regular Article - Experimental Physics;Relativity Theory;String Theory |
| 日期: | 2015-04-01 |
| 上傳時間: | 2026-04-23 13:47:46 (UTC+8) |
| 出版者: | Springer Verlag;Berlin/Heidelberg: Springer Berlin Heidelberg |
| 摘要: | 摘要： A bstract Dimuon and dielectron mass spectra, obtained from data resulting from proton-proton collisions at 8 TeV 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 2.90 TeV, a superstring-inspired Z ψ ′ lighter than 2.57 TeV, and Randall-Sundrum Kaluza-Klein gravitons with masses below 2.73, 2.35, and 1.27 TeV 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 3.3 TeV, where the number of additional spatial dimensions varies from 3 to 7. Similarly, lower limits on Λ, 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.
其他題名： J. High Energ. Phys
出版者： Berlin/Heidelberg: Springer Berlin Heidelberg
出版日期： 2015-04-07
出處： The journal of high energy physics, 2015-04, Vol.2015 (4)
資源來源： Publicly available content database
版權： The Author(s) 2015
識別號： ISSN: 1029-8479
識別號： EISSN: 1029-8479
識別號： DOI: 10.1007/JHEP04(2015)025 |
| 顯示於類別: | [物理學系] 期刊論文
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