Observation of B ̄0(s) → J/ψf1(1285) decays and measurement of the f1(1285) mixing angle

LHCb Collaboration, 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, A. A. Alves, S. Amato, S. Amerio, Y. Amhis, L. Anderlini, J. Anderson, R. AndreassenM. Andreotti, J. E. Andrews, R. B. Appleby, O. Aquines Gutierrez, F. Archilli, A. Artamonov, M. Artuso, E. Aslanides, G. Auriemma, M. Baalouch, S. Bachmann, J. J. Back, A. Badalov, C. Baesso, V. Balagura, W. Baldini, R. J. Barlow, C. Barschel, S. Barsuk, W. Barter, S. Bifani, P. Griffith, P. Ilten, I. R. Kenyon, C. Lazzeroni, A. Mazurov, J. McCarthy, C. J. Parkinson, L. Pescatore, D. Popov, N. K. Watson

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

19 Citations (Scopus)
39 Downloads (Pure)

Abstract

Decays of B ̄0s and B ̄0 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. B ̄0(s) → J/ψf1(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 qq̄ structure model is determined to be ±(24.0+3.1-2.6+0.6-0.8)°. Implications on the possible tetraquark nature of the f1(1285) are discussed.

Original languageEnglish
Article number091802
Number of pages9
JournalPhysical Review Letters
Volume112
Issue number9
DOIs
Publication statusPublished - 4 Mar 2014

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Fingerprint

Dive into the research topics of 'Observation of B ̄0(s) → J/ψf1(1285) decays and measurement of the f1(1285) mixing angle'. Together they form a unique fingerprint.

Cite this