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Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/131785
Analysis of the resonant components in ¯¯¯B0s→J/ψπ+π−
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The decay ¯¯¯ B 0 s → J / ψ π + π − can be exploited to study C P 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 1.0 fb − 1 sample of data produced in 7 TeV p p 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 C P -odd fraction in this ¯¯¯ B 0 s decay is shown to be greater than 0.977 at 95% confidence level. In addition, we report the first measurement of the J / ψ π + π − branching fraction relative to J / ψ ϕ of ( 19.79 ± 0.47 ± 0.52 ) % .
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ABELLAN BETETA, Carlos, et al. Analysis of the resonant components in ¯¯¯B0s→J/ψπ+π−. Physical Review D. 2012. Vol. 86, num. 5, pags. 052006 -377. ISSN 1550-7998. [consulted: 22 of May of 2026]. Available at: https://hdl.handle.net/2445/131785