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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 | Name: ATLAS_2012_I1084540
Year: 2012
Summary:
'Rapidity gap cross sections measured with the ATLAS detector in pp collisions at sqrt(s) = 7 TeV.'
Experiment: ATLAS
Collider: LHC 7TeV
SpiresID: 1084540
Status: VALIDATED
Authors:
- Oldrich Kepka <kepkao@fzu.cz>
- Tim Martin <tim.martin@cern.ch>
- Paul Newman <Paul.Newman@cern.ch>
- Pavel Ruzicka <ruzicka@fzu.cz>
References:
- arXiv:1201.2808 [hep-ex]
RunInfo:
'Minimum bias inelastic pp collision at 7 TeV including diffractive component and overall cross section.'
NumEvents: 300000
Beams: [p+, p+]
Energies: [7000]
PtCuts: [0.2, 0.4, 0.6, 0.8]
Description:
'Pseudorapidity gap distributions in proton-proton collisions at sqrt(s) = 7
TeV are studied using a minimum bias data sample with an integrated luminosity of 7.1
inverse microbarns. 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 < 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 <~ 7 GeV.
The resulting cross section is d sigma / d Delta eta F ~ 1 mb for Delta eta F >~ 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. '
NeedCrossSection: yes
BibTeX: '@article{Collaboration:2012pw,
author = "Collaboration, ATLAS",
title = "{Rapidity gap cross sections measured with the ATLAS
detector in pp collisions at sqrt(s) = 7 TeV}",
year = "2012",
eprint = "1201.2808",
archivePrefix = "arXiv",
primaryClass = "hep-ex",
reportNumber = "CERN-PH-EP-2011-220",
SLACcitation = "%%CITATION = ARXIV:1201.2808;%%",
}'
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