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Measurement of Differential Branching Fractions of Inclusive B →x$_{u}$ℓ$^{+}$ν$_{ℓ}$ Decays

Cao, L.; Sutcliffe, W.; Van Tonder, R.; Bernlochner, F. U.; Adachi, I.; Aihara, H.; Asner, D. M.; Aushev, T.; Ayad, R.; Babu, V.; Bahinipati, S.; Behera, P.; Belous, K.; Bennett, J.; Bessner, M.; Bilka, T.; Biswal, J.; Bobrov, A.; Bračko, M.; ... mehr


The first measurements of differential branching fractions of inclusive semileptonic B → X$_{u}$ℓ$^{+}$ν$_{ℓ}$ decays are performed using the full Belle data set of 711 fb$^{-1}$ of integrated luminosity at the Υ(4S) resonance and for ℓ=e, μ. With the availability of these measurements, new avenues for future shape-function model-independent determinations of the Cabibbo-Kobayashi Maskawa matrix element |Vx$_{ub}$| can be pursued to gain new insights in the existing tension with respect to exclusive determinations. The differential branching fractions are reported as a function of the lepton energy, the four-momentum-transfer squared, light-cone momenta, the hadronic mass, and the hadronic mass squared. They are obtained by subtracting the backgrounds from semileptonic B → X$_{u}$ℓ$^{+}$ν$_{ℓ}$ decays and other processes, and corrected for resolution and acceptance effects.

Verlagsausgabe §
DOI: 10.5445/IR/1000142677
Veröffentlicht am 03.02.2022
DOI: 10.1103/PhysRevLett.127.261801
Zitationen: 6
Web of Science
Zitationen: 2
Zitationen: 5
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Experimentelle Teilchenphysik (ETP)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2021
Sprache Englisch
Identifikator ISSN: 0031-9007, 1079-7114, 1092-0145
KITopen-ID: 1000142677
Erschienen in Physical Review Letters
Verlag American Physical Society (APS)
Band 127
Heft 26
Seiten Art.-Nr.: 261801
Bemerkung zur Veröffentlichung Gefördert durch SCOAP3
Nachgewiesen in Dimensions
Web of Science
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