IRIS

Decays of B(s)(0) and B(0) mesons into J/psi pi+pi-pi+pi- 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. B(s)(0) J/psi 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 qq structure model is determined to be ±(24.0-2.6-0.8+3.1+0.6)°. Implications on the possible tetraquark nature of the f1(1285) are discussed.

Aaij, R., Adeva, B., Adinolfi, M., Adrover, C., Affolder, A., Ajaltouni, Z., et al. (2014). Observation of B(s)(0) J/psi f1(1285) decays and measurement of the f1(1285) mixing angle. PHYSICAL REVIEW LETTERS, 112(9), 091802-091802 [10.1103/PhysRevLett.112.091802].

Observation of B(s)(0) J/psi f1(1285) decays and measurement of the f1(1285) mixing angle

Archilli, F;CARBONI, GIOVANNI;SANTOVETTI, EMANUELE;
2014-01-01

Abstract

Decays of B(s)(0) and B(0) mesons into J/psi pi+pi-pi+pi- 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. B(s)(0) J/psi 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 qq structure model is determined to be ±(24.0-2.6-0.8+3.1+0.6)°. Implications on the possible tetraquark nature of the f1(1285) are discussed.
2014
Pubblicato
Rilevanza internazionale
Articolo
Esperti anonimi
Settore FIS/04 - FISICA NUCLEARE E SUBNUCLEARE
English
Aaij, R., Adeva, B., Adinolfi, M., Adrover, C., Affolder, A., Ajaltouni, Z., et al. (2014). Observation of B(s)(0) J/psi f1(1285) decays and measurement of the f1(1285) mixing angle. PHYSICAL REVIEW LETTERS, 112(9), 091802-091802 [10.1103/PhysRevLett.112.091802].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/99053
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