RT Journal Article
T1 Determination of γ and− 2βs from charmless two-body decays of beauty mesons
A1 LHCb Collaboration, 
A1 Adeva Andany, Bernardo
A1 Álvarez Cartelle, Paula
A1 Dosil Suárez, Álvaro
A1 Fernández Albor, Víctor Manuel
A1 Gallas Torreira, Abraham Antonio
A1 García Pardiñas, Julián
A1 Hernando Morata, José Ángel
A1 Pazos Álvarez, Antonio
A1 Pérez Trigo, Eliseo
A1 Plo Casasus, Máximo
A1 Romero Vidal, Antonio
A1 Saborido Silva, Juan José
A1 Sanmartín Sedes, Brais
A1 Santamarina Ríos, Cibrán
A1 Seco Miguélez, Marcos Antonio
A1 Vázquez Regueiro, Pablo
A1 Vázquez Sierra, Carlos
A1 Vieites Díaz, María
AB Using the latest LHCb measurements of time-dependent CPviolation in the B0s→K+K−decay, aU-spinrelation between the decay amplitudes of B0s→K+K−and B0→π+π−decay processes allows constraints to be placed on the angle γof the unitarity triangle and on the B0smixing phase −2βs. Results from an extended approach, which uses additional inputs on B0→π0π0and B+→π+π0decays from other experiments and exploits isospin symmetry, are also presented. The dependence of the results on the maximum allowed amount of U-spinbreaking is studied. At 68% probability, the value γ=(63.5+7.2−6.7)◦modulo180◦is determined. In an alternative analysis, the value −2βs=−0.12+0.14−0.16radis found. In both measurements, the uncertainties due to U-spinbreaking effects up to 50% are included
PB Elsevier
SN 0370-2693
YR 2015
FD 2015
LK http://hdl.handle.net/10347/21715
UL http://hdl.handle.net/10347/21715
LA eng
NO Aaij, R., Beteta, C. A., Adeva, B., Adinolfi, M., Affolder, A., Ajaltouni, Z., ... & Ali, S. (2015). Determination of γ and− 2βs from charmless two-body decays of beauty mesons. Physics Letters B, 741, 1-11
DS Minerva
RD 22 abr 2026