2026-04-14T03:43:38Zhttps://recercat.cat/oai/request

oai:recercat.cat:2445/1954562025-11-21T05:49:55Zcom_2072_1057col_2072_478823col_2072_478904col_2072_478917

urn:hdl:2445/195456 Three-body non-leptonic heavy-to-heavy B decays at NNLO in QCD Huber, Tobias Virto, Javier Vos, K. Keri Teoria de camps (Física) Física de partícules Experiments Field theory (Physics) Particle physics Experiments Exclusive non-leptonic two-body decays of B mesons have been studied extensively in the past two decades within the framework of factorization. However, the exploration of the corresponding three-body case has only started recently, in part motivated by new data. We consider here the simplest non-leptonic three-body B decays from the point of view of factorization, namely heavy-to-heavy transitions. We provide a careful derivation of the SCET/QCDF factorized amplitudes to NNLO in αs, and discuss the numerical impact of NLO and NNLO corrections. We then study the narrow-width limit, showing that the three-body amplitude reproduces analytically the known quasi-two-body decay amplitudes, and compute finite-width corrections. Finally, we discuss certain observables that are sensitive to perturbative NLO and NNLO corrections and to higher Gegenbauer moments of the dimeson LCDAs. This is the first study of non-leptonic three-body B decays to NNLO in QCD. 2023-03-17T16:26:03Z 2023-03-17T16:26:03Z 2020-11-20 2023-03-17T16:26:03Z info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Reproducció del document publicat a: https://doi.org/10.1007/jhep11(2020)103 Journal of High Energy Physics, 2020, vol. 2020, num. 103 https://doi.org/10.1007/jhep11(2020)103 cc-by (c) Huber, Tobias et al., 2020 https://creativecommons.org/licenses/by/4.0/ info:eu-repo/semantics/openAccess Springer Verlag Articles publicats en revistes (Física Quàntica i Astrofísica)