Hadron spectra for semileptonic heavy quark decay

Journal Article · Fri Mar 01 04:00:00 EST 1996 · Physical Review, D

DOI:https://doi.org/10.1103/PhysRevD.53.2491· OSTI ID:279169

Falk, A F ^[1]; Luke, M ^[2]; Savage, M J ^[3]

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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)
3. Department of Physics, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213 (United States)

We calculate the leading perturbative and power corrections to the hadronic invariant mass and energy spectra in semileptonic heavy hadron decays. We apply our results to the {ital B} system. Moments of the invariant mass spectrum, which vanish in the parton model, probe gluon bremsstrahlung and nonperturbative effects. Combining our results with recent data on {ital B} meson branching ratios, we obtain a lower bound {bar {Lambda}}{approx_gt}410MeV and an upper bound {ital m}{sub {ital b}}{sup pole}{lt}4.89 GeV. The Brodsky-Lepage-Mackenzie scale-setting procedure suggests that higher order perturbative corrections to the first moment of the hadronic invariant mass spectrum are small for bottom decay, and even tractable for charm decay. {copyright} {ital 1996 The American Physical Society.}

• Research Organization: University of California
• DOE Contract Number: FG03-90ER40546; FG02-91ER40682; FG02-94ER40869
• OSTI ID: 279169
• Journal Information: Physical Review, D, Journal Name: Physical Review, D Journal Issue: 5 Vol. 53; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
BEAUTY PARTICLES
BRANCHING RATIO
BREMSSTRAHLUNG
CORRECTIONS
ENERGY SPECTRA
GLUONS
HADRONS
MASS SPECTRA
PARTON MODEL
PERTURBATION THEORY
QUARKS
SEMILEPTONIC DECAY