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Improved measurement of the b(b)over-bar production cross section in 920 GeV fixed-target proton-nucleus collisions
HERA-B Collaboration
2006
发表期刊PHYSICAL REVIEW D
卷号73期号:5页码:52005
通讯作者Abt, I (reprint author), Werner Heisenberg Inst Phys, Max Planck Inst Phys, D-80805 Munich, Germany.
文章类型Article
摘要A new measurement of the b (b) over bar production cross section in 920 GeV proton-nucleus collisions is presented by the HERA-B Collaboration. The b (b) over bar production is tagged via inclusive bottom quark decays into J/psi mesons by exploiting the longitudinal separation of J/psi -> l(+)l(-) decay vertices from the primary proton-nucleus interaction point. Both e(+)e(-) and mu(+)mu(-) channels are reconstructed for a total of 83 +/- 12 inclusive b -> J/psi X events found. The combined analysis yields a b (b) over bar to prompt J/psi cross section ratio of Delta sigma(b (b) over bar)/Delta sigma(J/psi)=0.032 +/- 0.005(stat)+/- 0.004(sys) measured in the x(F) acceptance (-0.35 < x(F)< 0.15), extrapolated to nb/sigma(b (b) over bar)=14.9 +/- 2.2(stat)+/- 2.4(sys) nucleon in the total phase space.
学科领域Astronomy & Astrophysics; Physics
DOI10.1103/PhysRevD.73.052005
收录类别SCI
WOS类目Astronomy & Astrophysics ; Physics, Particles & Fields
WOS记录号WOS:000236465800015
引用统计
被引频次:15[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/227913
专题实验物理中心
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HERA-B Collaboration. Improved measurement of the b(b)over-bar production cross section in 920 GeV fixed-target proton-nucleus collisions[J]. PHYSICAL REVIEW D,2006,73(5):52005.
APA HERA-B Collaboration.(2006).Improved measurement of the b(b)over-bar production cross section in 920 GeV fixed-target proton-nucleus collisions.PHYSICAL REVIEW D,73(5),52005.
MLA HERA-B Collaboration."Improved measurement of the b(b)over-bar production cross section in 920 GeV fixed-target proton-nucleus collisions".PHYSICAL REVIEW D 73.5(2006):52005.
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