QQ客服 官方微博 反馈留言

	Measurement of b hadron lifetimes in pp collisions at root s=8tev
	Sirunyan, A. M.1; Collaboration, C. M. S.; Tumasyan, A.1; Adam, W.2; Ambrogi, F.2; Asilar, E.2; Bergauer, T.2; Brandstetter, J.2; Brondolin, E.2; Dragicevic, M.2
刊名	European physical journal c
	2018-06-07
卷号	78期号:6页码:28
ISSN号	1434-6044
DOI	10.1140/epjc/s10052-018-5929-3
通讯作者	Sirunyan, a. m.()
英文摘要	Measurements are presented of the lifetimes of the b-0, b-s(0), lambda(0)(b), and b-c(+) hadrons using the decay channels b-0 -> j/psi k*(892)(0), b-0 -> j/psi k-s(0), b-s(0) -> j/psi pi(+)pi(-), b-s(0) -> j/psi phi(1020), lambda(0)(b) -> j/psi lambda(0), and b-c(+) -> j/psi pi(+). the data sample, corresponding to an integrated luminosity of 19.7 fb(-1), was collected by the cms detector at the lhc in proton-proton collisions at root s = 8tev. the b-0 life-time is measured to be 453.0 +/- 1.6 (stat) +/- 1.8 (syst) mu m in j/psi k*(892)(0) and 457.8 +/- 2.7 (stat) +/- 2.8 (syst) mu m in j/psi k-s(0), which results in a combined measurement of c tau(0) = 454.1 +/- 1.4 (stat) +/- 1.7 (syst) mu m. the effective lifetime of the b-s(0) meson is measured in two decay modes, with contributions from different amounts of the heavy and light eigenstates. this results in two different measured lifetimes: c tau(0)(bs) -> j/psi pi(+)pi(-) = 502.7 +/- 10.2 (stat) +/- 3.4 (syst) mu m and c tau(0)(bs) -> j/psi phi(1020) = 443.9 +/- 2.0 (stat) +/- 1.5 (syst) mu m. the lambda(0)(b) lifetime is found to be 442.9 +/- 8.2 (stat) +/- 2.8 (syst) mu m. the precision from each of these channels is as good as or better than previous measurements. the b-c(+) lifetime, measured with respect to the b+ to reduce the systematic uncertainty, is 162.3 +/- 7.8 (stat) +/- 4.2 (syst) +/- 0.1 (tau(b+)) mu m. all results are in agreement with current world-average values.
WOS关键词	C MESON LIFETIME ; GENERATOR ; BCVEGPY ; DECAY
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:000434419800001
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2177570
专题	高能物理研究所
通讯作者	Sirunyan, A. M.
作者单位	1.Yerevan Phys Inst, Yerevan, Armenia 2.Inst Hochenergiephys, Vienna, Austria 3.Inst Nucl Problems, Minsk, BELARUS 4.Univ Antwerp, Antwerp, Belgium 5.Vrije Univ Brussel, Brussels, Belgium 6.Univ Libre Bruxelles, Brussels, Belgium 7.Univ Ghent, Ghent, Belgium 8.Catholic Univ Louvain, Louvain La Neuve, 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.,Collaboration, C. M. S.,Tumasyan, A.,et al. Measurement of b hadron lifetimes in pp collisions at root s=8tev[J]. European physical journal c,2018,78(6):28.
APA	Sirunyan, A. M..,Collaboration, C. M. S..,Tumasyan, A..,Adam, W..,Ambrogi, F..,...&Yusli, M. N..(2018).Measurement of b hadron lifetimes in pp collisions at root s=8tev.European physical journal c,78(6),28.
MLA	Sirunyan, A. M.,et al."Measurement of b hadron lifetimes in pp collisions at root s=8tev".European physical journal c 78.6(2018):28.

个性服务

查看访问统计

相关权益政策

暂无数据

收藏/分享

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。