Measurement of the Ƴ(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, <math><mo stretchy="false" is="tr...

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Autores principales: Anduaga, Xabier Sebastián, Monticelli, Fernando Gabriel, Dova, María Teresa, Tripiana, Martín Fernando, The ATLAS Collaboration
Formato: Articulo
Lenguaje:Inglés
Publicado: 2011
Materias:
Física
Υ (1S) production
pp collisions
centre of mass energy
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/77464
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-77464
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Física
Υ (1S) production
pp collisions
centre of mass energy
spellingShingle Física
Υ (1S) production
pp collisions
centre of mass energy
Anduaga, Xabier Sebastián
Monticelli, Fernando Gabriel
Dova, María Teresa
Tripiana, Martín Fernando
The ATLAS Collaboration
Measurement of the Ƴ(1S) production cross-section in pp collisions at √s = 7 TeV in ATLAS
topic_facet Física
Υ (1S) production
pp collisions
centre of mass energy
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, <math><mo stretchy="false" is="true">|</mo><msup is="true"><mi is="true">y</mi><mrow is="true"><mi is="true">ϒ</mi><mo stretchy="false" is="true">(</mo><mn is="true">1</mn><mi is="true">S</mi><mo stretchy="false" is="true">)</mo></mrow></msup><mo stretchy="false" is="true">|</mo><mo is="true"><</mo><mn is="true">1.2</mn></math> and <math><mn is="true">1.2</mn><mo is="true"><</mo><mo stretchy="false" is="true">|</mo><msup is="true"><mi is="true">y</mi><mrow is="true"><mi is="true">ϒ</mi><mo stretchy="false" is="true">(</mo><mn is="true">1</mn><mi is="true">S</mi><mo stretchy="false" is="true">)</mo></mrow></msup><mo stretchy="false" is="true">|</mo><mo is="true"><</mo><mn is="true">2.4</mn></math>. The measurement requires that both muons have transverse momentum <math><msubsup is="true"><mi is="true">p</mi><mi is="true">T</mi><mi is="true">μ</mi></msubsup><mo is="true">></mo><mn is="true">4</mn><mtext is="true"> GeV</mtext></math> and pseudorapidity <math><mo stretchy="false" is="true">|</mo><msup is="true"><mi is="true">η</mi><mi is="true">μ</mi></msup><mo stretchy="false" is="true">|</mo><mo is="true"><</mo><mn is="true">2.5</mn></math> 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.
format Articulo
Articulo
author Anduaga, Xabier Sebastián
Monticelli, Fernando Gabriel
Dova, María Teresa
Tripiana, Martín Fernando
The ATLAS Collaboration
author_facet Anduaga, Xabier Sebastián
Monticelli, Fernando Gabriel
Dova, María Teresa
Tripiana, Martín Fernando
The ATLAS Collaboration
author_sort Anduaga, Xabier Sebastián
title Measurement of the Ƴ(1S) production cross-section in pp collisions at √s = 7 TeV in ATLAS
title_short Measurement of the Ƴ(1S) production cross-section in pp collisions at √s = 7 TeV in ATLAS
title_full Measurement of the Ƴ(1S) production cross-section in pp collisions at √s = 7 TeV in ATLAS
title_fullStr Measurement of the Ƴ(1S) production cross-section in pp collisions at √s = 7 TeV in ATLAS
title_full_unstemmed Measurement of the Ƴ(1S) production cross-section in pp collisions at √s = 7 TeV in ATLAS
title_sort measurement of the ƴ(1s) production cross-section in pp collisions at √s = 7 tev in atlas
publishDate 2011
url http://sedici.unlp.edu.ar/handle/10915/77464
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AT tripianamartinfernando measurementoftheƴ1sproductioncrosssectioninppcollisionsats7tevinatlas
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