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Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/185713
Determination of γ and -2βs from charmless two-body decays of beauty mesons
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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
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GARRIDO BELTRÁN, Lluís, et al. Determination of γ and -2βs from charmless two-body decays of beauty mesons. Physics Letters B. 2015. Vol. 741, num. 1-11. ISSN 0370-2693. [consulted: 18 of August of 2026]. Available at: https://hdl.handle.net/2445/185713