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- Title
Measurement of the CKM angle γ using the B<sup>±</sup>→ D<sup>*</sup>h<sup>±</sup> channels.
- Authors
Aaij, R.; Abdelmotteleb, A. S. W.; Abellan Beteta, C.; Abudinén, F.; Ackernley, T.; Adeva, B.; Adinolfi, M.; Adlarson, P.; Afsharnia, H.; Agapopoulou, C.; Aidala, C. A.; Ajaltouni, Z.; Akar, S.; Akiba, K.; Albicocco, P.; Albrecht, J.; Alessio, F.; Alexander, M.; Alfonso Albero, A.; Aliouche, Z.
- Abstract
A measurement of the CP-violating observables from B± → D*K± and B± → D*π± decays is presented, where D*(D) is an admixture of D*0 and D ¯ ∗ 0 (D0 and D ¯ 0 ) states and is reconstructed through the decay chains D*→ Dπ0/γ and D → K S 0 π + π − / K S 0 K + K − . The measurement is performed by analysing the signal yield variation across the D decay phase space and is independent of any amplitude model. The data sample used was collected by the LHCb experiment in proton-proton collisions and corresponds to a total integrated luminosity of 9 fb−1 at centre-of-mass energies of 7, 8 and 13 TeV. The CKM angle γ is determined to be 69 − 14 + 13 ∘ using the measured CP-violating observables. The hadronic parameters r B D ∗ K ± , r B D ∗ π ± , δ B D ∗ K ± , δ B D ∗ π ± , which are the ratios and strong phase differences between favoured and suppressed B± decays, are also reported.
- Subjects
PROTON-proton interactions; PHASE space; HADRON-hadron scattering; CP violation; ANGLES; LUMINOSITY; MEASUREMENT
- Publication
Journal of High Energy Physics, 2023, Vol 2023, Issue 12, p1
- ISSN
1126-6708
- Publication type
Article
- DOI
10.1007/JHEP12(2023)013