An amplitude analysis of the final state structure in the antiB0s → J/ψ K+ 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), f2′(1525), and four additional resonances. The overall branching fraction is measured to be B(antiB0s → J/ψ K+ K−) = (7.70 ± 0.08 ± 0.39 ± 0.60) x 10^−4, where the first uncertainty is statistical, the second systematic, and the third due to the ratio of the number of antiB0s to B− mesons produced. The mass and width of the f2′(1525) are measured to be 1522.2 ± 2.8_{−2.0}^{+5.3} MeV and 84 ± 6_{−5}^{+10} MeV, respectively. The final state fractions of the other resonant states are also reported.

R. Aaij, C. Abellan Beteta, A. Adametz, B. Adeva, M. Adinolfi, C. Adrover, et al. (2013). Amplitude Analysis and Branching Fraction Measurement of anti-B0s → J/ψ K+ K−. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 87(7), 1-23 [10.1103/PhysRevD.87.072004].

Amplitude Analysis and Branching Fraction Measurement of anti-B0s → J/ψ K+ K−

CARBONE, ANGELO;GALLI, DOMENICO;PATRIGNANI, CLAUDIA;PERAZZINI, STEFANO;VAGNONI, VINCENZO MARIA;ZANGOLI, MARIA;
2013

Abstract

An amplitude analysis of the final state structure in the antiB0s → J/ψ K+ 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), f2′(1525), and four additional resonances. The overall branching fraction is measured to be B(antiB0s → J/ψ K+ K−) = (7.70 ± 0.08 ± 0.39 ± 0.60) x 10^−4, where the first uncertainty is statistical, the second systematic, and the third due to the ratio of the number of antiB0s to B− mesons produced. The mass and width of the f2′(1525) are measured to be 1522.2 ± 2.8_{−2.0}^{+5.3} MeV and 84 ± 6_{−5}^{+10} MeV, respectively. The final state fractions of the other resonant states are also reported.
2013
R. Aaij, C. Abellan Beteta, A. Adametz, B. Adeva, M. Adinolfi, C. Adrover, et al. (2013). Amplitude Analysis and Branching Fraction Measurement of anti-B0s → J/ψ K+ K−. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 87(7), 1-23 [10.1103/PhysRevD.87.072004].
R. Aaij; C. Abellan Beteta; A. Adametz; B. Adeva; M. Adinolfi; C. Adrover; A. Affolder; Z. Ajaltouni; J. Albrecht; F. Alessio; M. Alexander; S. Ali; G...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/134636
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