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

Pseudorapidity gap distributions in proton-proton collisions at √s = 7 TeV are studied using a minimum bias data sample with an integrated luminosity of 7.1 μb−1. Cross sections are measured differentially in terms of ΔηF, the larger of the pseudorapidity regions extending to the limits of the ATLAS...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autor principal: Aad, G.
Formato: JOUR
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_14346044_v72_n3_p_Aad
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_14346044_v72_n3_p_Aad
record_format dspace
spelling todo:paper_14346044_v72_n3_p_Aad2023-10-03T16:14:48Z Rapidity gap cross sections measured with the ATLAS detector in pp collisions at √s =7 TeV Aad, G. Pseudorapidity gap distributions in proton-proton collisions at √s = 7 TeV are studied using a minimum bias data sample with an integrated luminosity of 7.1 μb−1. Cross sections are measured differentially in terms of ΔηF, the larger of the pseudorapidity regions extending to the limits of the ATLAS sensitivity, at η = ±4.9, in which no final state particles are produced above a transverse momentum threshold pcut<inf>T</inf>. The measurements span the region 0 < ΔηF < 8 for 200 MeV < pcut<inf>T</inf> < 800 MeV. At small ΔηF, 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<inf>Y</inf> < 7 GeV. The resulting cross section is dσ/dΔηF ≈1 mb for ΔηF > 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. © CERN for the benefit of the ATLAS Collaboration 2012. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_14346044_v72_n3_p_Aad
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
description Pseudorapidity gap distributions in proton-proton collisions at √s = 7 TeV are studied using a minimum bias data sample with an integrated luminosity of 7.1 μb−1. Cross sections are measured differentially in terms of ΔηF, the larger of the pseudorapidity regions extending to the limits of the ATLAS sensitivity, at η = ±4.9, in which no final state particles are produced above a transverse momentum threshold pcut<inf>T</inf>. The measurements span the region 0 < ΔηF < 8 for 200 MeV < pcut<inf>T</inf> < 800 MeV. At small ΔηF, 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<inf>Y</inf> < 7 GeV. The resulting cross section is dσ/dΔηF ≈1 mb for ΔηF > 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. © CERN for the benefit of the ATLAS Collaboration 2012.
format JOUR
author Aad, G.
spellingShingle Aad, G.
Rapidity gap cross sections measured with the ATLAS detector in pp collisions at √s =7 TeV
author_facet Aad, G.
author_sort Aad, G.
title Rapidity gap cross sections measured with the ATLAS detector in pp collisions at √s =7 TeV
title_short Rapidity gap cross sections measured with the ATLAS detector in pp collisions at √s =7 TeV
title_full Rapidity gap cross sections measured with the ATLAS detector in pp collisions at √s =7 TeV
title_fullStr Rapidity gap cross sections measured with the ATLAS detector in pp collisions at √s =7 TeV
title_full_unstemmed Rapidity gap cross sections measured with the ATLAS detector in pp collisions at √s =7 TeV
title_sort rapidity gap cross sections measured with the atlas detector in pp collisions at √s =7 tev
url http://hdl.handle.net/20.500.12110/paper_14346044_v72_n3_p_Aad
work_keys_str_mv AT aadg rapiditygapcrosssectionsmeasuredwiththeatlasdetectorinppcollisionsats7tev
_version_ 1807322357839167488

Ejemplares similares