Hadronic spectral moments in semileptonic B decays with a lepton energy cut

Journal Article · Thu Jan 01 04:00:00 EST 1998 · Physical Review, D

DOI:https://doi.org/10.1103/PhysRevD.57.424· OSTI ID:573865

Falk, A F ^[1]; Luke, M ^[2]

---

1. Department of Physics and Astronomy, The Johns Hopkins University, 3400 North Charles Street, Baltimore, Maryland 21218 (United States)
2. Department of Physics, University of Toronto, 60 St. George Street, Toronto, Ontario, M5S 1A7 (CANADA)

We compute the first two moments {l_angle}(s{sub H}{minus}{bar m}{sub D}{sup 2}){sup 1,2}{r_angle} of the final hadronic invariant mass in the inclusive decay B{r_arrow}X{sub c}scr(l){bar {nu}}, in the presence of a cut E{sub scr(l)}{sup min} on the charged lepton energy. These moments may be measured directly by experiments at the {Upsilon}(4S) using the neutrino reconstruction technique, which requires such a cut. Measurement of these moments will place constraints on the nonperturbative parameters {bar {Lambda}} and {lambda}{sub 1}, which are relevant for extracting the quark masses m{sub b} and m{sub c}, as well as the CKM angle V{sub cb}. We include terms of order {alpha}{sub s}{sup 2}{beta}{sub 0} and 1/m{sub b}{sup 3} in the operator product expansion, and use the latter to estimate the theoretical uncertainty in the extraction of {bar {Lambda}} and {lambda}{sub 1}. {copyright} {ital 1997} {ital The American Physical Society}

• OSTI ID: 573865
• Journal Information: Physical Review, D, Journal Name: Physical Review, D Journal Issue: 1 Vol. 57; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
B MESONS
ENERGY
INCLUSIVE INTERACTIONS
KOBAYASHI-MASKAWA MATRIX
MASS
MOMENTS METHOD
NEUTRINOS
OPERATOR PRODUCT EXPANSION
QUARKS
SEMILEPTONIC DECAY