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Title: | Measurement of the CKM angle γ and Bs0‐B¯s0 mixing frequency with Bs0→Ds∓h±π±π∓ decays |
Author: | Alfonso Albero, Alejandro Garcia Moreno, P. Garrido Beltrán, Lluís Gironella Gironell, P. Gomez Fernandez, S. Graugés Pous, Eugeni Lobo Salvia, A. Mauricio, J. Vazquez Gomez, R. Marin Benito, Carla 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: | 2021 |
Publisher: | Springer Verlag |
Abstract: | The CKM angle γ is measured for the first time from mixing-induced CP violation between B0 s → D∓ s K±π ±π ∓ and B 0 s → D± s K∓π ∓π ± decays reconstructed in proton-proton collision data corresponding to an integrated luminosity of 9 fb−1 recorded with the LHCb detector. A time-dependent amplitude analysis is performed to extract the CP-violating weak phase γ − 2βs and, subsequently, γ by taking the B0 s -B 0 s mixing phase βs as an external input. The measurement yields γ = (44±12)◦ modulo 180◦ , where statistical and systematic uncertainties are combined. An alternative model-independent measurement, integrating over the five-dimensional phase space of the decay, yields γ = (44 + 20 − 13) ◦ modulo 180◦ . Moreover, the B0 s -B 0 s oscillation frequency is measured from the flavour-specific control channel B0 s → D− s π +π +π − to be ∆ms = (17.757 ± 0.007(stat) ± 0.008(syst)) ps−1 , consistent with and more precise than the current world-average value. |
Note: | Reproducció del document publicat a: https://doi.org/10.1007/JHEP03(2021)137 |
It is part of: | Journal of High Energy Physics, 2021, vol. 2021, p. 1-46 |
URI: | http://hdl.handle.net/2445/185491 |
Related resource: | https://doi.org/10.1007/JHEP03(2021)137 |
ISSN: | 1126-6708 |
Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) |
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