Measurement of the Bs0→J/ψK ̄*0 branching fraction and angular amplitudes
- R. Aaij,
- C. Abellan Beteta,
- A. Adametz,
- B. Adeva,
- M. Adinolfi,
- C. Adrover
- National Institute for Subatomic Physics,
- Centro Brasileiro de Pesquisas Físicas,
- Ramon Llull University,
- University of Barcelona,
- Heidelberg University,
- University of Santiago de Compostela
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Abstract
A sample of 114±11 Bs0→J/ψK -π + signal events obtained with 0.37fb -1 of pp collisions at √s=7TeV collected by the LHCb experiment is used to measure the branching fraction and polarization amplitudes of the Bs0→J/ψK ̄*0 decay, with K ̄ *0→K -π +. The K -π + mass spectrum of the candidates in the Bs0 peak is dominated by the K ̄*0 contribution. Subtracting the nonresonant K -π + component, the branching fraction of Bs0→J/ψK ̄*0 is (4.4-0.4+0.5±0.8)×10 -5, where the first uncertainty is statistical and the second is systematic. A fit to the angular distribution of the decay products yields the K *0 polarization fractions f L=0.50±0.08±0.02 and f=0.19-0.08+0.10±0.02.
Publication Information
Output type
Original language
EnglishArticle number
071102Journal (Volume, Issue Number)
Physical Review D - Particles, Fields, Gravitation and Cosmology (Volume 86, Issue 7)Publication milestones
- Published - 08/10/2012
Publication status
ISSN
1550-7998Publication IDs
- Scopus: 84867261132
- WOS: 000309584600001