First observation of forward z -> b(b)over-bar production in pp collisions at root s=8 tev
文献类型：期刊论文
| 作者 | Aaij, R.; Adeva, B.41; Adinolfi, M.50; Ajaltouni, Z.5; Akar, S.61; Albrecht, J.10; Alessio, F.42; Alexander, M.55; Albero, A. Alfonso40; Ali, S.45 |
| 刊名 | Physics letters b
 |
| 出版日期 | 2018-01-10 |
| 卷号 | 776页码:430-439 |
| ISSN号 | 0370-2693 |
| DOI | 10.1016/j.physletb.2017.11.066 |
| 通讯作者 | Sestini, l.() |
| 英文摘要 | The decay z -> b (b) over bar is reconstructed in pp collision data, corresponding to 2 fb(-1) of integrated luminosity, collected by the lhcb experiment at a centre-of-mass energy of root s = 8 tev. the product of the z production cross-section and the z -> b (b) over bar branching fraction is measured for candidates in the fiducial region defined by two particle-level b-quark jets with pseudorapidities in the range 2.2 < eta < 4.2, with transverse momenta p(t) > 20 gev and dijet invariant mass in the range 45 < m(jj) < 165 gev. from a signal yield of 5462 +/- 763 z -> b (b) over bar events, where the uncertainty is statistical, a production cross-section times branching fraction of 332 +/- 46 +/- 59 pb is obtained, where the first uncertainty is statistical and the second systematic. the measured significance of the signal yield is 6.0 standard deviations. this measurement represents the first observation of the z -> b (b) over bar production in the forward region of pp collisions. (c) 2017 the author(s). published by elsevier b.v. |
| WOS关键词 | COLOR ; QUARK ; DECAY |
| WOS研究方向 | Astronomy & Astrophysics ; Physics |
| WOS类目 | Astronomy & Astrophysics ; Physics, Nuclear ; Physics, Particles & Fields |
| 语种 | 英语 |
| WOS记录号 | WOS:000419641100058 |
| 出版者 | ELSEVIER SCIENCE BV |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2178240 |
| 专题 | 高能物理研究所 |
| 通讯作者 | Sestini, L. |
| 作者单位 | 1.CBPF, Rio De Janeiro, Brazil 2.Univ Fed Rio de Janeiro, Rio De Janeiro, Brazil 3.Tsinghua Univ, Ctr High Energy Phys, Beijing, Peoples R China 4.Univ Savoie Mont Blanc, CNRS, IN2P3, LAPP, Annecy Le Vieux, France 5.Univ Blaise Pascal, Clermont Univ, CNRS, IN2P3,LPC, Clermont Ferrand, France 6.Aix Marseille Univ, CNRS, IN2P3, CPPM, Marseille, France 7.Univ Paris 11, CNRS, IN2P3, LAL, Orsay, France 8.Univ Paris 06, Univ Paris Diderot, CNRS, IN2P3,LPHNE, Paris, France 9.Rhein Westfal TH Aachen, Phys Inst 1, Aachen, Germany 10.Tech Univ Dortmund, Fak Phys, Dortmund, Germany |
| 推荐引用方式 GB/T 7714 | Aaij, R.,Adeva, B.,Adinolfi, M.,et al. First observation of forward z -> b(b)over-bar production in pp collisions at root s=8 tev[J]. Physics letters b,2018,776:430-439. |
| APA | Aaij, R..,Adeva, B..,Adinolfi, M..,Ajaltouni, Z..,Akar, S..,...&Zucchelli, S..(2018).First observation of forward z -> b(b)over-bar production in pp collisions at root s=8 tev.Physics letters b,776,430-439. |
| MLA | Aaij, R.,et al."First observation of forward z -> b(b)over-bar production in pp collisions at root s=8 tev".Physics letters b 776(2018):430-439. |
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