Rare decays B → Xd+γ in the standard model
Creators
- 1. Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany)
- 2. Zurich Univ. (Switzerland)
Description
We present an estimate of the inclusive decay rate and photon energy- and hadron massspectrum for the CKM-suppressed radiative rare decays B→ Xd + γ, based on perturbative QCD and a phenomenological model for the B-meson wave function (here Xd denotes non-strange hadrons). Present constraints on vertical strokeVtdvertical stroke are used to predict BR(B → Xd + γ) = (0.6 - 3) x 10-5 for the top quark mass in the range 100 GeV << mt << 200 GeV. From the inclusive invariant hadron-mass spectrum and using vector meson dominance in the region m(Xd) << 1GeV, we estimate the branching ratio for the exclusive rare decay mode B → ρ + γ and the ratio Γ (B → ρ + γ)/Γ (B → K* + γ). The importance of measuring these decays in determining the CKM matrix element vertical strokeVtdvertical stroke is emphasized. (orig.)
Availability note (English)
MF available from INIS under the Report Number.
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Additional details
Publishing Information
- Imprint Pagination
- 21 p.
- Report number
- DESY--92-048
INIS
- Country of Publication
- Germany
- Country of Input or Organization
- Germany
- INIS RN
- 23073066
- Subject category
- S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
- Resource subtype / Literary indicator
- Numerical Data
- Descriptors DEI
- B MESONS; BRANCHING RATIO; BREMSSTRAHLUNG; EFFECTIVE MASS; ENERGY SPECTRA; EXCLUSIVE INTERACTIONS; FERMI INTERACTIONS; FLAVOR MODEL; GAMMA SPECTRA; HAMILTONIANS; INCLUSIVE INTERACTIONS; KOBAYASHI-MASKAWA MATRIX; MASS SPECTRA; MATRIX ELEMENTS; M1-TRANSITIONS; PARTICLE STRUCTURE; PARTICLE WIDTHS; PERTURBATION THEORY; QUANTUM CHROMODYNAMICS; QUARKS; RADIATIVE CORRECTIONS; RADIATIVE DECAY; REST MASS; STANDARD MODEL; THEORETICAL DATA; TOP PARTICLES; VECTOR DOMINANCE MODEL; WAVE FUNCTIONS
- Descriptors DEC
- BASIC INTERACTIONS; BEAUTY PARTICLES; BOSONS; COMPOSITE MODELS; CORRECTIONS; DATA; DECAY; ELECTROMAGNETIC RADIATION; ELEMENTARY PARTICLES; ENERGY-LEVEL TRANSITIONS; FERMIONS; FIELD THEORIES; FUNCTIONS; GRAND UNIFIED THEORY; HADRONS; INFORMATION; INTERACTIONS; MASS; MATHEMATICAL MODELS; MATHEMATICAL OPERATORS; MATRICES; MESONS; MULTIPOLE TRANSITIONS; NUMERICAL DATA; PARTICLE DECAY; PARTICLE INTERACTIONS; PARTICLE MODELS; PARTICLE PROPERTIES; POSTULATED PARTICLES; PSEUDOSCALAR MESONS; QUANTUM FIELD THEORY; QUANTUM OPERATORS; QUARK MODEL; RADIATIONS; SPECTRA; UNIFIED GAUGE MODELS; WEAK INTERACTIONS
Optional Information
- Secondary number(s)
- ZU-TH--11/92.