Rapidity gap cross sections measured with the ATLAS detector in pp collisions at root s=7 TeV

	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
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.
学科主题	Physics
类目[WOS]	Physics, Particles & Fields
收录类别	SCI
语种	英语
WOS记录号	WOS:000302540000042
公开日期	2016-02-26
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/213206]
专题	高能物理研究所_实验物理中心
作者单位	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	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).