Measurements of the pp -> zz production cross section and the z -> 4l branching fraction, and constraints on anomalous triple gauge couplings at root s=13tev
文献类型：期刊论文
| 作者 | Sirunyan, A. M.2; Tumasyan, A.2; Adam, W.3; Ambrogi, F.3; Asilar, E.3; Bergauer, T.3; Brandstetter, J.3; Brondolin, E.3; Dragicevic, M.3; Eroe, J.3 |
| 刊名 | European physical journal c
 |
| 出版日期 | 2018-02-24 |
| 卷号 | 78期号:2页码:29 |
| ISSN号 | 1434-6044 |
| DOI | 10.1140/epjc/s10052-018-5567-9 |
| 通讯作者 | Sirunyan, a. m.(cms-publication-committe-chair@cern.ch) |
| 英文摘要 | Four-lepton production in proton-proton collisions, pp -> (z/gamma*)(z/gamma*) -> 4l, where l = e or mu, is studied at a center-of-mass energy of 13 tev with the cms detector at the lhc. the data sample corresponds to an integrated luminosity of 35.9 fb(-1). the zz production cross section, sigma(pp -> zz) = 17.2 +/- 0.5 (stat) +/- 0.7 (syst) +/- 0.4 (theo) +/- 0.4 (lumi) pb, measured using events with two opposite-sign, same-flavor lepton pairs produced in the mass region 60 < m(l+l-) < 120 gev, is consistent with standard model predictions. differential cross sections are measured and are well described by the theoretical predictions. the z boson branching fraction to four leptons is measured to be b(z -> 4l) = 4.83(-0.22)(+0.23) (stat)(-0.29)(+0.32) (syst) +/- 0.08 (theo) +/- 0.12(lumi) x 10(-6) for events with a four-lepton invariant mass in the range 80 < m(4l) < 100 gev and a dilepton mass m(ll) > 4gev for all opposite-sign, same-flavor lepton pairs. the results agree with standard model predictions. the invariant mass distribution of the four-lepton system is used to set limits on anomalous zzz and zz. couplings at 95% confidence level: -0.0012 < f(4)(z) < 0.0010, -0.0010 < f(5)(z) < 0.0013, -0.0012 < f(4)(gamma) < 0.0013, -0.0012 < f(5)(gamma) < 0.0013. |
| WOS关键词 | FINAL-STATES ; NNLO QCD ; COLLISIONS ; COLLIDERS ; LHC ; TEV |
| WOS研究方向 | Physics |
| WOS类目 | Physics, Particles & Fields |
| 语种 | 英语 |
| WOS记录号 | WOS:000426484600003 |
| 出版者 | SPRINGER |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2178042 |
| 专题 | 高能物理研究所 |
| 通讯作者 | Sirunyan, A. M. |
| 作者单位 | 1.CERN, CH-1211 Geneva 23, Switzerland 2.Yerevan Phys Inst, Yerevan, Armenia 3.Inst Hochenergiephys, Vienna, Austria 4.Inst Nucl Problems, Minsk, Byelarus 5.Vrije Univ Brussel, Brussels, Belgium 6.Univ Libre Bruxelles, Brussels, Belgium 7.Univ Ghent, Ghent, Belgium 8.Catholic Univ Louvain, Louvain, Belgium 9.Univ Mons, Mons, Belgium 10.Ctr Brasileiro Pesquisas Fis, Rio De Janeiro, Brazil |
| 推荐引用方式 GB/T 7714 | Sirunyan, A. M.,Tumasyan, A.,Adam, W.,et al. Measurements of the pp -> zz production cross section and the z -> 4l branching fraction, and constraints on anomalous triple gauge couplings at root s=13tev[J]. European physical journal c,2018,78(2):29. |
| APA | Sirunyan, A. M..,Tumasyan, A..,Adam, W..,Ambrogi, F..,Asilar, E..,...&Ahmad, A..(2018).Measurements of the pp -> zz production cross section and the z -> 4l branching fraction, and constraints on anomalous triple gauge couplings at root s=13tev.European physical journal c,78(2),29. |
| MLA | Sirunyan, A. M.,et al."Measurements of the pp -> zz production cross section and the z -> 4l branching fraction, and constraints on anomalous triple gauge couplings at root s=13tev".European physical journal c 78.2(2018):29. |
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