Resumen
The decay Bso→J/ψπ +π - can be exploited to study CP violation. A detailed understanding of its structure is imperative in order to optimize its usefulness. An analysis of this three-body final state is performed using a 1.0fb -1 sample of data produced in 7TeV pp collisions at the LHC and collected by the LHCb experiment. A modified Dalitz plot analysis of the final state is performed using both the invariant mass spectra and the decay angular distributions. The π +π - system is shown to be dominantly in an S-wave state, and the CP-odd fraction in this B̄s0 decay is shown to be greater than 0.977 at 95%confidence level. In addition, we report the first measurement of the J/ψπ +π - branching fraction relative to J/ψ of (19.79±0.47±0.52)%.
Idioma original | English |
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Número de artículo | 052006 |
Publicación | Physical Review D - Particles, Fields, Gravitation and Cosmology |
Volumen | 86 |
N.º | 5 |
DOI | |
Estado | Published - 17 sept 2012 |
Publicado de forma externa | Sí |
All Science Journal Classification (ASJC) codes
- Física nuclear y de alta energía
- Física y astronomía (miscelánea)