Measurement of W+W − production in association with one jet in proton–proton collisions at √s = 8 TeV with the ATLAS detector

The production of W boson pairs in association with one jet in pp collisions at √s = 8 TeV is studied using data corresponding to an integrated luminosity of 20.3 fb−1 collected by the ATLAS detector during 2012 at the CERN Large Hadron Collider. The cross section is measured in a fiducial phase-spa...

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Autores principales: Alconada Verzini, María Josefina, Alonso, Francisco, Arduh, Francisco Anuar, Dova, María Teresa, Hoya, Joaquín, Monticelli, Fernando Gabriel, Wahlberg, Hernán Pablo, The ATLAS Collaboration
Formato: Articulo
Lenguaje:Inglés
Publicado: 2016
Materias:
Ciencias Exactas
W+W− production
proton–proton collisions
ATLAS detector
Física
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/77686
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-77686
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Exactas
W+W− production
proton–proton collisions
ATLAS detector
Física
spellingShingle Ciencias Exactas
W+W− production
proton–proton collisions
ATLAS detector
Física
Alconada Verzini, María Josefina
Alonso, Francisco
Arduh, Francisco Anuar
Dova, María Teresa
Hoya, Joaquín
Monticelli, Fernando Gabriel
Wahlberg, Hernán Pablo
The ATLAS Collaboration
Measurement of W+W − production in association with one jet in proton–proton collisions at √s = 8 TeV with the ATLAS detector
topic_facet Ciencias Exactas
W+W− production
proton–proton collisions
ATLAS detector
Física
description The production of W boson pairs in association with one jet in pp collisions at √s = 8 TeV is studied using data corresponding to an integrated luminosity of 20.3 fb−1 collected by the ATLAS detector during 2012 at the CERN Large Hadron Collider. The cross section is measured in a fiducial phase-space region defined by the presence of exactly one electron and one muon, missing transverse momentum and exactly one jet with a transverse momentum above 25 GeV and a pseudorapidity of |η| < 4.5. The leptons are required to have opposite electric charge and to pass transverse momentum and pseudorapidity requirements. The fiducial cross section is found to be <math><msubsup is="true"><mrow is="true"><mi is="true">σ</mi></mrow><mrow is="true"><mi is="true">W</mi><mi is="true">W</mi></mrow><mrow is="true"><mtext is="true">fid,1-jet</mtext></mrow></msubsup><mo is="true">=</mo><mn is="true">136</mn><mo is="true">±</mo><mn is="true">6</mn><mrow is="true"><mo stretchy="true" is="true">(</mo><mtext is="true">stat</mtext><mo stretchy="true" is="true">)</mo></mrow><mo is="true">±</mo><mn is="true">14</mn><mrow is="true"><mo stretchy="true" is="true">(</mo><mtext is="true">syst</mtext><mo stretchy="true" is="true">)</mo></mrow><mo is="true">±</mo><mn is="true">3</mn><mrow is="true"><mo stretchy="true" is="true">(</mo><mtext is="true">lumi</mtext><mo stretchy="true" is="true">)</mo></mrow><mtext is="true"></mtext><mtext is="true">fb</mtext></math>. In combination with a previous measurement restricted to leptonic final states with no associated jets, the fiducial cross section of W W production with zero or one jet is measured to be <math><msubsup is="true"><mrow is="true"><mi is="true">σ</mi></mrow><mrow is="true"><mi is="true">W</mi><mi is="true">W</mi></mrow><mrow is="true"><mtext is="true">fid</mtext><mo is="true">,</mo><mo is="true">≤</mo><mn is="true">1</mn><mtext is="true">-jet</mtext></mrow></msubsup><mo is="true">=</mo><mn is="true">511</mn><mo is="true">±</mo><mn is="true">9</mn><mrow is="true"><mo stretchy="true" is="true">(</mo><mtext is="true">stat</mtext><mo stretchy="true" is="true">)</mo></mrow><mo is="true">±</mo><mn is="true">26</mn><mrow is="true"><mo stretchy="true" is="true">(</mo><mtext is="true">syst</mtext><mo stretchy="true" is="true">)</mo></mrow><mo is="true">±</mo><mn is="true">10</mn><mrow is="true"><mo stretchy="true" is="true">(</mo><mtext is="true">lumi</mtext><mo stretchy="true" is="true">)</mo></mrow><mtext is="true"></mtext><mtext is="true">fb</mtext></math>. The ratio of fiducial cross sections in final states with one and zero jets is determined to be 0.36 ± 0.05. Finally, a total cross section extrapolated from the fiducial measurement of W W production with zero or one associated jet is reported. The measurements are compared to theoretical predictions and found in good agreement.
format Articulo
Articulo
author Alconada Verzini, María Josefina
Alonso, Francisco
Arduh, Francisco Anuar
Dova, María Teresa
Hoya, Joaquín
Monticelli, Fernando Gabriel
Wahlberg, Hernán Pablo
The ATLAS Collaboration
author_facet Alconada Verzini, María Josefina
Alonso, Francisco
Arduh, Francisco Anuar
Dova, María Teresa
Hoya, Joaquín
Monticelli, Fernando Gabriel
Wahlberg, Hernán Pablo
The ATLAS Collaboration
author_sort Alconada Verzini, María Josefina
title Measurement of W+W − production in association with one jet in proton–proton collisions at √s = 8 TeV with the ATLAS detector
title_short Measurement of W+W − production in association with one jet in proton–proton collisions at √s = 8 TeV with the ATLAS detector
title_full Measurement of W+W − production in association with one jet in proton–proton collisions at √s = 8 TeV with the ATLAS detector
title_fullStr Measurement of W+W − production in association with one jet in proton–proton collisions at √s = 8 TeV with the ATLAS detector
title_full_unstemmed Measurement of W+W − production in association with one jet in proton–proton collisions at √s = 8 TeV with the ATLAS detector
title_sort measurement of w+w − production in association with one jet in proton–proton collisions at √s = 8 tev with the atlas detector
publishDate 2016
url http://sedici.unlp.edu.ar/handle/10915/77686
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