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Title: | Determination of γ and -2βs from charmless two-body decays of beauty mesons |
Author: | Garrido Beltrán, Lluís Graciani Díaz, Ricardo Graugés Pous, Eugeni Marin Benito, Carla Picatoste, E. Rives, V. Ruiz, Hugo LHCb Collaboration |
Keywords: | Hadrons Gran Col·lisionador d'Hadrons Física de partícules Experiments Hadrons Large Hadron Collider (France and Switzerland) Particle physics Experiments |
Issue Date: | 4-Feb-2015 |
Publisher: | Elsevier B.V. |
Abstract: | Using the latest LHCb measurements of time-dependent CP violation in the B0 s → K + K − decay, a U-spin relation between the decay amplitudes of B0 s → K + K − and B0 → π +π − decay processes allows constraints to be placed on the angle γ of the unitarity triangle and on the B0 s mixing phase −2βs . Results from an extended approach, which uses additional inputs on B0 → π 0π 0 and B+ → π +π 0 decays from other experiments and exploits isospin symmetry, are also presented. The dependence of the results on the maximum allowed amount of U-spin breaking is studied. At 68% probability, the value γ = (63.5+7.2 −6.7)◦ modulo 180◦ is determined. In an alternative analysis, the value −2βs = −0.12+0.14 −0.16 rad is found. In both measurements, the uncertainties due to U-spin breaking effects up to 50% are included |
Note: | Reproducció del document publicat a: https://doi.org/10.1016/j.physletb.2014.12.015 |
It is part of: | Physics Letters B, 2015, vol. 741, p. 1-11 |
URI: | http://hdl.handle.net/2445/185713 |
Related resource: | https://doi.org/10.1016/j.physletb.2014.12.015 |
ISSN: | 0370-2693 |
Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) |
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