Search for physics beyond the standard model in dilepton mass spectra in proton-proton collisions at root s=8 tev
文献类型：期刊论文
| 作者 | Khachatryan, V.1; Sirunyan, A. M.1; Tumasyan, A.1; Adam, W.2; Bergauer, T.2; Dragicevic, M.2; Eroe, J.2; Fabjan, C.2,190; Friedl, M.2; Fruehwirth, R.2,190 |
| 刊名 | Journal of high energy physics
 |
| 出版日期 | 2015-04-07 |
| 期号 | 4页码:49 |
| ISSN号 | 1029-8479 |
| 关键词 | Hadron-hadron scattering Beyond standard model Particle and resonance production |
| DOI | 10.1007/jhep04(2015)025 |
| 英文摘要 | 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. |
| 语种 | 英语 |
| 出版者 | SPRINGER |
| WOS记录号 | WOS:000356852800001 |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/1639625 |
| 专题 | 高能物理研究所 |
| 通讯作者 | Khachatryan, V. |
| 作者单位 | 1.Yerevan Phys Inst, Yerevan 375036, Armenia 2.OeAW, Inst Hochenergiephys, Vienna, Austria 3.Natl Ctr Particle & High Energy Phys, Minsk, Byelarus 4.Univ Antwerp, B-2020 Antwerp, Belgium 5.Vrije Univ Brussel, Brussels, Belgium 6.Univ Libre Bruxelles, Brussels, Belgium 7.Univ Ghent, B-9000 Ghent, Belgium 8.Catholic Univ Louvain, Louvain La Neuve, Belgium 9.Univ Mons, B-7000 Mons, Belgium 10.Ctr Brasileiro Pesquisas Fis, Rio De Janeiro, Brazil |
| 推荐引用方式 GB/T 7714 | Khachatryan, V.,Sirunyan, A. M.,Tumasyan, A.,et al. Search for physics beyond the standard model in dilepton mass spectra in proton-proton collisions at root s=8 tev[J]. Journal of high energy physics,2015(4):49. |
| APA | Khachatryan, V..,Sirunyan, A. M..,Tumasyan, A..,Adam, W..,Bergauer, T..,...&Moisenz, P..(2015).Search for physics beyond the standard model in dilepton mass spectra in proton-proton collisions at root s=8 tev.Journal of high energy physics(4),49. |
| MLA | Khachatryan, V.,et al."Search for physics beyond the standard model in dilepton mass spectra in proton-proton collisions at root s=8 tev".Journal of high energy physics .4(2015):49. |
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