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Measurements of q$^{2}$ moments of inclusive B →x$_{c}$ℓ$^{+}$ν$_{ℓ}$ decays with hadronic tagging

Van Tonder, R.; Cao, L.; Sutcliffe, W.; Welsch, M.; Bernlochner, F. U.; Adachi, I.; Aihara, H.; Asner, D. M.; Aushev, T.; Ayad, R.; Babu, V.; Behera, P.; Belous, K.; Bennett, J.; Bessner, M.; Bhardwaj, V.; Bhuyan, B.; Bilka, T.; Biswal, J.; ... mehr


We present the measurement of the first to fourth order moments of the four-momentum transfer squared, q$^{2}$, of inclusive B →x$_{c}$ℓ$^{+}$ν$_{ℓ}$ decays using the full Belle dataset of 711 fb$^{-1}$ of integrated luminosity at the Υ(4S) resonance where ℓ=e, μ. The determination of these moments and their systematic uncertainties open new pathways to determine the absolute value of the Cabibbo Kobayashi-Maskawa matrix element V$_{cb}$using a reduced set of matrix elements of the heavy quark expansion. In order to identify and reconstruct the X$_{c}$ system, we reconstruct one of the two B-mesons using machine learning techniques in fully hadronic decay modes. The moments are measured with progressively increasing threshold selections on q$^{2}$ starting with a lower value of 3.0 GeV$^{2}$ in steps of 0.5 GeV$^{2}$ up to a value of 10.0 GeV$^{2}$. The measured moments are further unfolded, correcting for reconstruction and selection effects as well as QED final state radiation. We report the moments separately for electron and muon final states and observe no lepton flavor universality violating effects.

Verlagsausgabe §
DOI: 10.5445/IR/1000142067
Veröffentlicht am 20.01.2022
DOI: 10.1103/PhysRevD.104.112011
Zitationen: 11
Web of Science
Zitationen: 8
Zitationen: 7
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Experimentelle Teilchenphysik (ETP)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2021
Sprache Englisch
Identifikator ISSN: 2470-0010, 0556-2821, 1089-4918, 1538-4500, 1550-2368, 1550-7998, 2470-0029
KITopen-ID: 1000142067
Erschienen in Physical Review D
Verlag American Physical Society (APS)
Band 104
Heft 11
Seiten A46
Bemerkung zur Veröffentlichung Gefördert durch SCOAP3
Nachgewiesen in Dimensions
Web of Science
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