Título:
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First Measurement of the Charge Asymmetry in Beauty-Quark Pair Production
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Autor/a:
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Badalov, Alexey; Calvo Gómez, Míriam; Camboni, Alessandro; Vilasís Cardona, Xavier; LHCb Collaboration - CERN
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Otros autores:
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Universitat Ramon Llull. La Salle; CERN |
Abstract:
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The difference in the angular distributions between beauty quarks and antiquarks, referred to as the charge asymmetry, is measured for the first time in b¯b pair production at a hadron collider. The data used correspond to an integrated luminosity of 1.0 fb−1 collected at 7 TeV center-of-mass energy in proton-proton collisions with the LHCb detector. The measurement is performed in three regions of the invariant mass of the b¯b system. The results obtained are Ab¯bC(40105 GeV/c2)=1.6±1.7±0.6%, where Ab¯bC is defined as the asymmetry in the difference in rapidity between jets formed from the beauty quark and antiquark, where in each case the first uncertainty is statistical and the second systematic. The beauty jets are required to satisfy 2<η<4, ET>20 GeV, and have an opening angle in the transverse plane Δϕ>2.6 rad. These measurements are consistent with the predictions of the standard model. |
Fecha de creación:
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20-08-2014 |
Materias (CDU):
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53 - Física |
Materia(s):
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Gran col·lisionador d'hadrons (França i Suïssa) Partícules (Física nuclear) Protons Hadrons Col·lisions (Física nuclear) |
Derechos:
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L'accés als continguts d'aquest document queda condicionat a l'acceptació de les condicions d'ús establertes per la següent llicència Creative Commons:http://creativecommons.org/licenses/by/4.0/
© CERN |
Páginas:
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9 p. |
Tipo de documento:
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Artículo Artículo - Versión publicada |
DOI:
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https://doi.org/10.1103/PhysRevLett.113.082003
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Editor:
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American Physical Society
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Publish at:
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Physical Review Letters, 2014, Vol. 113, No. 8 (Agosto)
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Compartir:
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