Decays of anti-B0s and anti-B0 mesons into J/ψ π+ π− π+ π− final states, produced in pp collisions at the LHC, are investigated using data corresponding to an integrated luminosity of 3 fb^−1 collected with the LHCb detector. anti-B0(s) → J/ψ f1(1285) decays are seen for the first time, and the branching fractions are measured. Using these rates, the f1(1285) mixing angle between strange and nonstrange components of its wave function in the q anti-q structure model is determined to be ±(24.0{−2.6}{+3.1}{−0.8}{+0.6})°. Implications on the possible tetraquark nature of the f1(1285) are discussed.

R. Aaij, B. Adeva, M. Adinolfi, C. Adrover, A. Affolder, Z. Ajaltouni, et al. (2014). Observation of anti-B0(s) → J/ψ f1(1285) Decays and Measurement of the f1(1285) Mixing Angle. PHYSICAL REVIEW LETTERS, 112(9), 1-9 [10.1103/PhysRevLett.112.091802].

Observation of anti-B0(s) → J/ψ f1(1285) Decays and Measurement of the f1(1285) Mixing Angle

CARBONE, ANGELO;GALLI, DOMENICO;PATRIGNANI, CLAUDIA;PERAZZINI, STEFANO;VAGNONI, VINCENZO MARIA;ZANGOLI, MARIA;
2014

Abstract

Decays of anti-B0s and anti-B0 mesons into J/ψ π+ π− π+ π− final states, produced in pp collisions at the LHC, are investigated using data corresponding to an integrated luminosity of 3 fb^−1 collected with the LHCb detector. anti-B0(s) → J/ψ f1(1285) decays are seen for the first time, and the branching fractions are measured. Using these rates, the f1(1285) mixing angle between strange and nonstrange components of its wave function in the q anti-q structure model is determined to be ±(24.0{−2.6}{+3.1}{−0.8}{+0.6})°. Implications on the possible tetraquark nature of the f1(1285) are discussed.
2014
R. Aaij, B. Adeva, M. Adinolfi, C. Adrover, A. Affolder, Z. Ajaltouni, et al. (2014). Observation of anti-B0(s) → J/ψ f1(1285) Decays and Measurement of the f1(1285) Mixing Angle. PHYSICAL REVIEW LETTERS, 112(9), 1-9 [10.1103/PhysRevLett.112.091802].
R. Aaij; B. Adeva; M. Adinolfi; C. Adrover; A. Affolder; Z. Ajaltouni; J. Albrecht; F. Alessio; M. Alexander; S. Ali; G. Alkhazov; P. Alvarez Cartelle...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/244275
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