QCD-based interpretation of the lepton spectrum in inclusive [ital [bar B]][r arrow][ital X][sub [ital u]l][bar [nu]] decays
Journal Article
·
· Physical Review, D (Particles Fields); (United States)
- Theory Division, CERN, CH-1211 Geneva 23 (Switzerland)
We present a QCD-based approach to the end-point region of the lepton spectrum in [ital [bar B]][r arrow][ital X][sub [ital u]l][bar [nu]] decays. A genuinely nonperturbative form factor, the shape function, which describes the falloff of the spectrum close to the end point. The moments of this function are related to forward scattering matrix elements of local, higher-dimension operators. We find that nonperturbative effects are dominant over a finite region in the lepton energy spectrum, the width of which is related to the kinetic energy of the [ital b] quark inside the [ital B] meson. Applications of our method to the extraction of fundamental standard model parameters, among them [ital V][sub [ital u][ital b]], are discussed.
- OSTI ID:
- 5018817
- Journal Information:
- Physical Review, D (Particles Fields); (United States), Journal Name: Physical Review, D (Particles Fields); (United States) Vol. 49:7; ISSN PRVDAQ; ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
Similar Records
Resummation of nonperturbative corrections to the lepton spectrum in inclusive [ital B][r arrow][ital X][sub [ital q]][ital l][bar [nu]] decays
Analysis of the photon spectrum in inclusive [ital B][r arrow][ital X][sub [ital s]][gamma] decays
Nonperturbative corrections to the heavy lepton energy distribution in the inclusive decays [ital H][sub [ital b]][r arrow][tau][bar [nu]][ital X]
Journal Article
·
Mon Aug 01 00:00:00 EDT 1994
· Physical Review, D (Particles Fields); (United States)
·
OSTI ID:7025636
Analysis of the photon spectrum in inclusive [ital B][r arrow][ital X][sub [ital s]][gamma] decays
Journal Article
·
Sun May 01 00:00:00 EDT 1994
· Physical Review, D (Particles Fields); (United States)
·
OSTI ID:5015586
Nonperturbative corrections to the heavy lepton energy distribution in the inclusive decays [ital H][sub [ital b]][r arrow][tau][bar [nu]][ital X]
Journal Article
·
Thu Mar 31 23:00:00 EST 1994
· Physical Review, D (Particles Fields); (United States)
·
OSTI ID:5122809
Related Subjects
662230 -- Quantum Chromodynamics-- (1992-)
662240 -- Models for Strong Interactions-- (1992-)
662350* -- Decays of Mesons-- (1992-)
662420 -- Properties of Mesons & Meson Resonances-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
AMPLITUDES
ANTI-B NEUTRAL MESONS
B MESONS
B NEUTRAL MESONS
BEAUTY PARTICLES
BOSONS
DECAY
ELEMENTARY PARTICLES
ENERGY
ENERGY SPECTRA
FERMIONS
FIELD THEORIES
FORM FACTORS
HADRONS
INCLUSIVE INTERACTIONS
INTERACTIONS
KINETIC ENERGY
LEPTONS
MATHEMATICAL MODELS
MATRIX ELEMENTS
MESONS
PARTICLE DECAY
PARTICLE INTERACTIONS
PARTICLE MODELS
PARTICLE PROPERTIES
PSEUDOSCALAR MESONS
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
SCATTERING AMPLITUDES
SEMILEPTONIC DECAY
SPECTRA
STANDARD MODEL
UNIFIED GAUGE MODELS
WEAK PARTICLE DECAY
662240 -- Models for Strong Interactions-- (1992-)
662350* -- Decays of Mesons-- (1992-)
662420 -- Properties of Mesons & Meson Resonances-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
AMPLITUDES
ANTI-B NEUTRAL MESONS
B MESONS
B NEUTRAL MESONS
BEAUTY PARTICLES
BOSONS
DECAY
ELEMENTARY PARTICLES
ENERGY
ENERGY SPECTRA
FERMIONS
FIELD THEORIES
FORM FACTORS
HADRONS
INCLUSIVE INTERACTIONS
INTERACTIONS
KINETIC ENERGY
LEPTONS
MATHEMATICAL MODELS
MATRIX ELEMENTS
MESONS
PARTICLE DECAY
PARTICLE INTERACTIONS
PARTICLE MODELS
PARTICLE PROPERTIES
PSEUDOSCALAR MESONS
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
SCATTERING AMPLITUDES
SEMILEPTONIC DECAY
SPECTRA
STANDARD MODEL
UNIFIED GAUGE MODELS
WEAK PARTICLE DECAY