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...

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Publicado: 2011
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03702693_v705_n1-2_p9_Aad
http://hdl.handle.net/20.500.12110/paper_03702693_v705_n1-2_p9_Aad
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_03702693_v705_n1-2_p9_Aad
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spelling paper:paper_03702693_v705_n1-2_p9_Aad2023-06-08T15:36:55Z 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. 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. 2011 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03702693_v705_n1-2_p9_Aad 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.
title Measurement of the Υ(1S) production cross-section in pp collisions at s=7 TeV in ATLAS
spellingShingle 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
publishDate 2011
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03702693_v705_n1-2_p9_Aad
http://hdl.handle.net/20.500.12110/paper_03702693_v705_n1-2_p9_Aad
_version_ 1768545007616131072

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