We report two novel determinations of |Vub| with reduced model dependence, based on measurements of the mass distribution of the hadronic system in semileptonic B decays. Events are selected by fully reconstructing the decay of one B meson and identifying a charged lepton from the decay of the other B meson from Υ(4S)→BB̄ events. In one approach, we combine the inclusive B̄→Xuν̄ rate, integrated up to a maximum hadronic mass mX<1.67GeV/c2, with a measurement of the inclusive B→Xsγ photon energy spectrum. We obtain |Vub|=(4.43±0.38stat±0.25syst±0.29theo)×10-3. In another approach we measure the total B̄→Xuν̄ rate over the full phase space and find |Vub|=(3.84±0.70stat±0.30syst±0.10theo)×10-3. © 2006 The American Physical Society.

Aubert, B., Barate, R., Boutigny, D., Couderc, F., Karyotakis, Y., Lees, J., et al. (2006). Determinations of |Vub| from inclusive semileptonic B decays with reduced model dependence. PHYSICAL REVIEW LETTERS, 96(22), 1-7 [10.1103/PhysRevLett.96.221801].

Determinations of |Vub| from inclusive semileptonic B decays with reduced model dependence

PATRIGNANI, CLAUDIA;
2006

Abstract

We report two novel determinations of |Vub| with reduced model dependence, based on measurements of the mass distribution of the hadronic system in semileptonic B decays. Events are selected by fully reconstructing the decay of one B meson and identifying a charged lepton from the decay of the other B meson from Υ(4S)→BB̄ events. In one approach, we combine the inclusive B̄→Xuν̄ rate, integrated up to a maximum hadronic mass mX<1.67GeV/c2, with a measurement of the inclusive B→Xsγ photon energy spectrum. We obtain |Vub|=(4.43±0.38stat±0.25syst±0.29theo)×10-3. In another approach we measure the total B̄→Xuν̄ rate over the full phase space and find |Vub|=(3.84±0.70stat±0.30syst±0.10theo)×10-3. © 2006 The American Physical Society.
2006
Aubert, B., Barate, R., Boutigny, D., Couderc, F., Karyotakis, Y., Lees, J., et al. (2006). Determinations of |Vub| from inclusive semileptonic B decays with reduced model dependence. PHYSICAL REVIEW LETTERS, 96(22), 1-7 [10.1103/PhysRevLett.96.221801].
Aubert, B; Barate, R.; Boutigny, D.; Couderc, F.; Karyotakis, Y.; Lees, J.P.; Poireau, V.; Tisserand, V.; Zghiche, A.; Grauges, E.; Palano, A.; Pappag...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/550773
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