Measurement of associated z plus charm production in proton-proton collisions at root s=8tev
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 | 2018-04-09 |
| 卷号 | 78期号:4页码:34 |
| ISSN号 | 1434-6044 |
| DOI | 10.1140/epjc/s10052-018-5752-x |
| 通讯作者 | Sirunyan, a. m.() |
| 英文摘要 | A study of the associated production of a z boson and a charm quark jet (z + c), and a comparison to production with a b quark jet (z + b), in pp collisions at a centre-of-mass energy of 8 tev are presented. the analysis uses a data sample corresponding to an integrated luminosity of 19.7 fb(-1), collected with the cms detector at the cern lhc. the z boson candidates are identified through their decays into pairs of electrons or muons. jets originating from heavy flavour quarks are identified using semileptonic decays of c or b flavoured hadrons and hadronic decays of charm hadrons. the measurements are performed in the kinematic region with two leptons with pt(l) > 20 gev, vertical bar eta(l)vertical bar < 2.1, 71 < m(ll) < 111 gev, and heavy flavour jets with p(t)(jet) > 25 gev and vertical bar eta(jet)vertical bar < 2.5. the z + c production cross section is measured to be sigma(pp -> z + c + x) b(z -> l(+)l(-)) = 8.8 +/- 0.5 (stat)+/- 0.6 (syst) pb. the ratio of the z+c and z+b production cross sections is measured to be sigma(pp -> z+c+x)/sigma (pp -> z+b+x) = 2.0 +/- 0.2 (stat)+/- 0.2 (syst). the z+c production cross section and the cross section ratio are also measured as a function of the transverse momentum of thez boson and of the heavy flavour jet. the measurements are compared with theoretical predictions. |
| WOS关键词 | HADRON COLLIDERS ; NNLO QCD ; Z DECAYS ; LHC ; ALGORITHMS |
| WOS研究方向 | Physics |
| WOS类目 | Physics, Particles & Fields |
| 语种 | 英语 |
| 出版者 | SPRINGER |
| WOS记录号 | WOS:000429589900001 |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2178148 |
| 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.Natl Ctr Particle & High Energy Phys, Minsk, Byelarus 6.Univ Antwerp, Antwerp, Belgium 7.Vrije Univ Brussel, Brussels, Belgium 8.Univ Libre Bruxelles, Brussels, Belgium 9.Univ Ghent, Ghent, Belgium 10.Catholic Univ Louvain, Louvain, Belgium |
| 推荐引用方式 GB/T 7714 | Sirunyan, A. M.,Tumasyan, A.,Adam, W.,et al. Measurement of associated z plus charm production in proton-proton collisions at root s=8tev[J]. European physical journal c,2018,78(4):34. |
| APA | Sirunyan, A. M..,Tumasyan, A..,Adam, W..,Ambrogi, F..,Asilar, E..,...&Gorski, M..(2018).Measurement of associated z plus charm production in proton-proton collisions at root s=8tev.European physical journal c,78(4),34. |
| MLA | Sirunyan, A. M.,et al."Measurement of associated z plus charm production in proton-proton collisions at root s=8tev".European physical journal c 78.4(2018):34. |
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