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: | , , , , |
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2011
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Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/77464 |
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I19-R120-10915-77464 |
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Universidad Nacional de La Plata |
institution_str |
I-19 |
repository_str |
R-120 |
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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 anduagaxabiersebastian measurementoftheƴ1sproductioncrosssectioninppcollisionsats7tevinatlas AT monticellifernandogabriel measurementoftheƴ1sproductioncrosssectioninppcollisionsats7tevinatlas AT dovamariateresa measurementoftheƴ1sproductioncrosssectioninppcollisionsats7tevinatlas AT tripianamartinfernando measurementoftheƴ1sproductioncrosssectioninppcollisionsats7tevinatlas AT theatlascollaboration measurementoftheƴ1sproductioncrosssectioninppcollisionsats7tevinatlas |
bdutipo_str |
Repositorios |
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1764820484433641472 |