Título:
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Amplitude analysis and branching fraction measurement of ¯Bos → J/ψ K+K−
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Autor/a:
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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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An amplitude analysis of the final state structure in the ¯¯¯B0s→J/ψK+K− decay mode is performed using 1.0 fb−1 of data collected by the LHCb experiment in 7 TeV center-of-mass energy pp collisions produced by the LHC. A modified Dalitz plot analysis of the final state is performed using both the invariant mass spectra and the decay angular distributions. Resonant structures are observed in the K+K− mass spectrum as well as a significant nonresonant S-wave contribution over the entire K+K− mass range. The largest resonant component is the ϕ(1020), accompanied by f0(980), f′2(1525), and four additional resonances. The overall branching fraction is measured to be B(¯¯¯B0s→J/ψK+K−)=(7.70±0.08±0.39±0.60)×10−4, where the first uncertainty is statistical, the second systematic, and the third due to the ratio of the number of ¯¯¯B0s to B− mesons produced. The mass and width of the f′2(1525) are measured to be 1522.2±2.8+5.3−2.0 MeV and 84±6+10−5 MeV, respectively. The final state fractions of the other resonant states are also reported. |
Fecha de creación:
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08-04-2013 |
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) Col·lisions (Física nuclear) Mesons |
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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23 p. |
Tipo de documento:
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Artículo Artículo - Versión publicada |
DOI:
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https://doi.org/10.1103/PhysRevD.87.072004
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Editor:
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American Physical Society
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Publish at:
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Physical Review D, 2013, Vol. 87 , No.7 (Abril)
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Compartir:
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