Moments of the electron energy spectrum and partial branching fraction of $B\to X_{c}e\nu$ decays at Belle

Abstract

We report a measurement of the inclusive electron energy spectrum for charmed semileptonic decays of B mesons in a 140fb-1 data sample collected at the Υ(4S) resonance with the Belle detector at the KEKB asymmetric energy e+ e- collider. We determine the first four moments of the electron energy spectrum for threshold values of the electron energy between 0.4 and 2.0 GeV. In addition, we provide values of the partial branching fraction (zeroth moment) for the same electron threshold energies, and independent measurements of the B+ and B0 partial branching fractions at 0.4 GeV and 0.6 GeV electron threshold energies. We measure the independent B+ and B^0 partial branching fractions with electron threshold energies of 0.4 GeV to be Δ\mathcal{B} (B+ -> X_c e ν)=(10.79 +/- 0.25(stat.) +/- 0.27(sys.))% and Δ\mathcal{B} (B0 -> X_c e ν)=(10.09 +/- 0.30(stat.) +/- 0.22(sys.))%. Full correlations between all measurements are evaluated.

27 pages, 4 figures, 23 tables, Submitted to Phys. Rev. D

References in corpus (1)

• Measurements of the B to D* Form Factors Using the Decay B0 --> D* e nu_e

Cited by in corpus (32)

• Averages of $b$-hadron, $c$-hadron, and $\tau$-lepton properties as of summer 2016
• Averages of $b$-hadron, $c$-hadron, and $\tau$-lepton properties as of 2018
• Averages of $b$-hadron, $c$-hadron, and $\tau$-lepton properties as of 2021
• Flavor Physics in the Quark Sector
• Taming the higher power corrections in semileptonic B decays
• Measurement of the CKM Matrix Element $|V_{cb}|$ from $B^0\to D^{\ast -}{\ell }^{+}{\nu }_{\ell }$ at Belle
• Inclusive semileptonic fits, heavy quark masses, and V_cb
• Measurement of the $b$-quark production cross-section in 7 and 13 TeV $pp$ collisions
• Deciphering top flavor violation at the LHC with B factories
• New Physics at a Super Flavor Factory
• Challenges in Semileptonic B Decays
• Measurement of the form factors of the decay B0 -> D*- ell+ nu and determination of the CKM matrix element |Vcb|
• Third order corrections to the semi-leptonic \boldmath{$b\to c$} and the muon decays
• Kinetic corrections to B -> X_c l nu at one loop
• The CKM Parameters
• Measurement Of |V_ub| From Inclusive Charmless Semileptonic B Decays
• Measurement and interpretation of moments in inclusive semileptonic decays Bbar --> X_c l- nubar
• Measurement of the $B_c^{-}$ meson production fraction and asymmetry in 7 and 13 TeV $pp$ collisions
• Measurement of the Moments of the Photon Energy Spectrum in B -> X_s gamma Decays and Determination of |V_cb| and m_b at Belle
• The Heavy Quark Expansion for Inclusive Semileptonic Charm Decays Revisited
• B Meson Decays
• Inclusive semi-leptonic B meson decay structure functions from lattice QCD
• Resummed Mass Distribution for Jets Initiated by Massive Quarks
• Semi-inclusive studies of semileptonic $B_s$ decays at Belle
• Measurement of the relative $B^{-}\to D^0/D^{\ast 0}/D^{\ast \ast 0}{\mu }^{-}{\overline{\nu }}_{\mu }$ branching fractions using $B^{-}$ mesons from $\overline{B}{}_{s2}^{\ast 0}$ decays
• The forward-backward asymmetry and differences of partial moments in inclusive semileptonic B decays
• Experimental Status of the CKM Matrix
• Additional Information on Heavy Quark Parameters from Charged Lepton Forward-Backward Asymmetry
• An experimentalist's guide to the semileptonic bottom to charm branching fractions
• Inclusive semileptonic B decays and |Vcb|
• Measurement of the Ratio of Partial Branching Fractions of Inclusive $\overline{B}\to X_u\ell \overline{\nu }$ to $\overline{B}\to X_c\ell \overline{\nu }$ and the Ratio of their Spectra with Hadronic Tagging
• Determination of the Strong Coupling Constant ${\alpha }_s$ from Inclusive Semi-leptonic $B$ Meson Decays