Measurement of the Υ(1S) production cross-section in pp collisions at s=7 TeV in ATLAS

A measurement of the cross-section for Υ(1S)→μ + μ - production in proton-proton collisions at centre of mass energy of 7 TeV is presented. The cross-section is measured as a function of the Υ(1S) transverse momentum in two bins of rapidity, |y Υ(1S) |<1.2 and 1.2<|y Υ(1S) |<2.4...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autor principal: Aad, G.
Formato: JOUR
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_03702693_v705_n1-2_p9_Aad
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_03702693_v705_n1-2_p9_Aad
record_format dspace
spelling todo:paper_03702693_v705_n1-2_p9_Aad2023-10-03T15:29:10Z Measurement of the Υ(1S) production cross-section in pp collisions at s=7 TeV in ATLAS Aad, G. A measurement of the cross-section for Υ(1S)→μ + μ - production in proton-proton collisions at centre of mass energy of 7 TeV is presented. The cross-section is measured as a function of the Υ(1S) transverse momentum in two bins of rapidity, |y Υ(1S) |<1.2 and 1.2<|y Υ(1S) |<2.4. The measurement requires that both muons have transverse momentum pTμ>4 GeV and pseudorapidity |η μ |<2.5 in order to reduce theoretical uncertainties on the acceptance, which depend on the poorly known polarisation. The results are based on an integrated luminosity of 1.13 pb -1 , collected with the ATLAS detector at the Large Hadron Collider. The cross-section measurement is compared to theoretical predictions: it agrees to within a factor of two with a prediction based on the NRQCD model including colour-singlet and colour-octet matrix elements as implemented in Pythia while it disagrees by up to a factor of ten with the next-to-leading order prediction based on the colour-singlet model. © 2011 CERN. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_03702693_v705_n1-2_p9_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 A measurement of the cross-section for Υ(1S)→μ + μ - production in proton-proton collisions at centre of mass energy of 7 TeV is presented. The cross-section is measured as a function of the Υ(1S) transverse momentum in two bins of rapidity, |y Υ(1S) |<1.2 and 1.2<|y Υ(1S) |<2.4. The measurement requires that both muons have transverse momentum pTμ>4 GeV and pseudorapidity |η μ |<2.5 in order to reduce theoretical uncertainties on the acceptance, which depend on the poorly known polarisation. The results are based on an integrated luminosity of 1.13 pb -1 , collected with the ATLAS detector at the Large Hadron Collider. The cross-section measurement is compared to theoretical predictions: it agrees to within a factor of two with a prediction based on the NRQCD model including colour-singlet and colour-octet matrix elements as implemented in Pythia while it disagrees by up to a factor of ten with the next-to-leading order prediction based on the colour-singlet model. © 2011 CERN.
format JOUR
author Aad, G.
spellingShingle Aad, G.
Measurement of the Υ(1S) production cross-section in pp collisions at s=7 TeV in ATLAS
author_facet Aad, G.
author_sort Aad, G.
title Measurement of the Υ(1S) production cross-section in pp collisions at s=7 TeV in ATLAS
title_short Measurement of the Υ(1S) production cross-section in pp collisions at s=7 TeV in ATLAS
title_full Measurement of the Υ(1S) production cross-section in pp collisions at s=7 TeV in ATLAS
title_fullStr Measurement of the Υ(1S) production cross-section in pp collisions at s=7 TeV in ATLAS
title_full_unstemmed Measurement of the Υ(1S) production cross-section in pp collisions at s=7 TeV in ATLAS
title_sort measurement of the υ(1s) production cross-section in pp collisions at s=7 tev in atlas
url http://hdl.handle.net/20.500.12110/paper_03702693_v705_n1-2_p9_Aad
work_keys_str_mv AT aadg measurementofthey1sproductioncrosssectioninppcollisionsats7tevinatlas
_version_ 1807318752969097216

Ejemplares similares