Rapidity gap cross sections measured with the ATLAS detector in pp collisions at root s=7 TeV
ATLAS Collaboration
刊名EUROPEAN PHYSICAL JOURNAL C
2012
卷号72期号:3
关键词DEEP-INELASTIC SCATTERING DOUBLE-POMERON-EXCHANGE DUAL PARTON MODEL IN-BEAM TESTS DIFFRACTION DISSOCIATION ELASTIC-SCATTERING TRIPLE-REGGE HARD CALORIMETER HERA
学科分类Physics
DOI10.1140/epjc/s10052-012-1926-0
通讯作者Aad, G (reprint author), Univ Freiburg, Fak Math & Phys, Hugstetter Str 55, D-79106 Freiburg, Germany.
英文摘要Pseudorapidity gap distributions in proton-proton collisions at root s = 7 TeV are studied using a minimum bias data sample with an integrated luminosity of 7.1 mu b(-1). Cross sections are measured differentially in terms of Delta eta(F), the larger of the pseudorapidity regions extending to the limits of the ATLAS sensitivity, at eta = +/- 4.9, in which no final state particles are produced above a transverse momentum threshold p(T)(cut). The measurements span the region 0 < Delta eta(F) < 8 for 200 MeV < p(T)(cut) < 800 MeV. At small Delta eta(F), the data test the reliability of hadronisation models in describing rapidity and transverse momentum fluctuations in final state particle production. The measurements at larger gap sizes are dominated by contributions from the single diffractive dissociation process (pp -> Xp), enhanced by double dissociation (pp -> XY) where the invariant mass of the lighter of the two dissociation systems satisfies M-Y less than or similar to 7 GeV. The resulting cross section is ds sigma/d Delta eta(F) approximate to 1 mb for Delta eta(F) greater than or similar to 3. The large rapidity gap data are used to constrain the value of the Pomeron intercept appropriate to triple Regge models of soft diffraction. The cross section integrated over all gap sizes is compared with other LHC inelastic cross section measurements.
类目[WOS]Physics, Particles & Fields
收录类别SCI
语种英语
WOS记录号WOS:000302540000042
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被引频次:28[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/311005/213206
专题中国科学院高能物理研究所_实验物理中心_期刊论文
作者单位中国科学院高能物理研究所
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ATLAS Collaboration. Rapidity gap cross sections measured with the ATLAS detector in pp collisions at root s=7 TeV[J]. EUROPEAN PHYSICAL JOURNAL C,2012,72(3).
APA ATLAS Collaboration.(2012).Rapidity gap cross sections measured with the ATLAS detector in pp collisions at root s=7 TeV.EUROPEAN PHYSICAL JOURNAL C,72(3).
MLA ATLAS Collaboration."Rapidity gap cross sections measured with the ATLAS detector in pp collisions at root s=7 TeV".EUROPEAN PHYSICAL JOURNAL C 72.3(2012).
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