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 ATL...

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Autores principales: Anduaga, Xabier Sebastián, Dova, María Teresa, Monticelli, Fernando Gabriel, Tripiana, Martín F., The ATLAS Collaboration
Formato: Articulo
Lenguaje:Inglés
Publicado: 2012
Materias:
Ciencias Exactas
Física
proton-proton collisions
pseudorapidity
ATLAS detector
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/78708
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-78708
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Exactas
Física
proton-proton collisions
pseudorapidity
ATLAS detector
spellingShingle Ciencias Exactas
Física
proton-proton collisions
pseudorapidity
ATLAS detector
Anduaga, Xabier Sebastián
Dova, María Teresa
Monticelli, Fernando Gabriel
Tripiana, Martín F.
The ATLAS Collaboration
Rapidity gap cross sections measured with the ATLAS detector in pp collisions at √ s =7 TeV
topic_facet Ciencias Exactas
Física
proton-proton collisions
pseudorapidity
ATLAS detector
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 T . The measurements span the region 0 < ΔηF < 8 for 200 MeV < pcut T < 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 MY ≲ 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.
format Articulo
Articulo
author Anduaga, Xabier Sebastián
Dova, María Teresa
Monticelli, Fernando Gabriel
Tripiana, Martín F.
The ATLAS Collaboration
author_facet Anduaga, Xabier Sebastián
Dova, María Teresa
Monticelli, Fernando Gabriel
Tripiana, Martín F.
The ATLAS Collaboration
author_sort Anduaga, Xabier Sebastián
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
publishDate 2012
url http://sedici.unlp.edu.ar/handle/10915/78708
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