Measurement of upsilon production in 7 TeV pp collisions at ATLAS

Using 1.8 fb<sup>−1</sup> of <i>-pp</i> collisions at a center-of-mass energy of 7 TeV recorded by the ATLAS detector at the Large Hadron Collider, we present measurements of the production cross sections of <i>Υ</i>(1S,2S,3S) mesons.Υmesons are reconstructed usin...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autores principales: Anduaga, X. S., Monticelli, Fernando Gabriel, Dova, María Teresa, Tripiana, Martín Fernando
Formato: Articulo
Lenguaje:Inglés
Publicado: 2013
Materias:
Física
pp collisions
ATLAS detector
Large Hadron Collider
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/133202
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-133202
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Física
pp collisions
ATLAS detector
Large Hadron Collider
spellingShingle Física
pp collisions
ATLAS detector
Large Hadron Collider
Anduaga, X. S.
Monticelli, Fernando Gabriel
Dova, María Teresa
Tripiana, Martín Fernando
Measurement of upsilon production in 7 TeV pp collisions at ATLAS
topic_facet Física
pp collisions
ATLAS detector
Large Hadron Collider
description Using 1.8 fb<sup>−1</sup> of <i>-pp</i> collisions at a center-of-mass energy of 7 TeV recorded by the ATLAS detector at the Large Hadron Collider, we present measurements of the production cross sections of <i>Υ</i>(1S,2S,3S) mesons.Υmesons are reconstructed using the di-muon decay mode. Total production cross sections for <i><sub>pT</sub></i> <70 GeV and in the rapidity interval |<i>y<sup>Υ</sup></i>| <2.25 are measured to be 8.01±0.02±0.36±0.31 nb, 2.05±0.01±0.12±0.08 nb, 0.92±0.01±0.07±0.04 nb, respectively, with uncertainties separated into statistical, systematic, and luminosity measurement effects. In addition, differential cross section times di-muon branching fractions for<i>Υ</i>(1S),<i>Υ</i>(2S), and <i>Υ</i>(3S)as a function of <i>Υ</i> transverse momentum <i><sub>pT</sub></i> and rapidity are presented. These cross-sections are obtained assuming unpolarized production. If the production polarization is fully transverse or longitudinal with no azimuthal dependence in the helicity frame the cross-section may vary by approximately ±20%.If a non-trivial azimuthal dependence is considered, integrated cross-sections may be significantly enhanced by a factor of two or more. We compare our results to several theoretical models of <i>Υ</i> meson production, finding that none provide an accurate description of our data over the full range of <i>Υ</i> transverse momenta accessible with this dataset.
format Articulo
Articulo
author Anduaga, X. S.
Monticelli, Fernando Gabriel
Dova, María Teresa
Tripiana, Martín Fernando
author_facet Anduaga, X. S.
Monticelli, Fernando Gabriel
Dova, María Teresa
Tripiana, Martín Fernando
author_sort Anduaga, X. S.
title Measurement of upsilon production in 7 TeV pp collisions at ATLAS
title_short Measurement of upsilon production in 7 TeV pp collisions at ATLAS
title_full Measurement of upsilon production in 7 TeV pp collisions at ATLAS
title_fullStr Measurement of upsilon production in 7 TeV pp collisions at ATLAS
title_full_unstemmed Measurement of upsilon production in 7 TeV pp collisions at ATLAS
title_sort measurement of upsilon production in 7 tev pp collisions at atlas
publishDate 2013
url http://sedici.unlp.edu.ar/handle/10915/133202
work_keys_str_mv AT anduagaxs measurementofupsilonproductionin7tevppcollisionsatatlas
AT monticellifernandogabriel measurementofupsilonproductionin7tevppcollisionsatatlas
AT dovamariateresa measurementofupsilonproductionin7tevppcollisionsatatlas
AT tripianamartinfernando measurementofupsilonproductionin7tevppcollisionsatatlas
bdutipo_str Repositorios
_version_ 1764820454985433089

Ejemplares similares