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- Title
Measurement of the CKM angle γ in B<sup>±</sup> → DK<sup>±</sup> and B<sup>±</sup> → Dπ<sup>±</sup> decays with D → KS0h<sup>+</sup>h<sup>−</sup>.
- Authors
Aaij, R.; Abellán Beteta, C.; Ackernley, T.; Adeva, B.; Adinolfi, M.; Afsharnia, H.; Aidala, C. A.; Aiola, S.; Ajaltouni, Z.; Akar, S.; Albrecht, J.; Alessio, F.; Alexander, M.; Alfonso Albero, A.; Aliouche, Z.; Alkhazov, G.; Alvarez Cartelle, P.; Amato, S.; Amhis, Y.; An, L.
- Abstract
A measurement of CP-violating observables is performed using the decays B± → DK± and B± → Dπ±, where the D meson is reconstructed in one of the self-conjugate three-body final states K S 0 π+π− and K S 0 K+K− (commonly denoted K S 0 h+h−). The decays are analysed in bins of the D-decay phase space, leading to a measurement that is independent of the modelling of the D-decay amplitude. The observables are inter- preted in terms of the CKM angle γ. Using a data sample corresponding to an integrated luminosity of 9 fb−1 collected in proton-proton collisions at centre-of mass energies of 7, 8, and 13 TeV with the LHCb experiment, γ is measured to be 68.7 − 5.1 + 5.2 ° . The hadronic parameters r B DK , r B Dπ , δ B DK , and δ B Dπ , which are the ratios and strong-phase differences of the suppressed and favoured B± decays, are also reported.
- Publication
Journal of High Energy Physics, 2021, Vol 2021, Issue 2, p1
- ISSN
1126-6708
- Publication type
Article
- DOI
10.1007/JHEP02(2021)169