Published January 1, 2005 | Version v1
Journal article Metadata-only

Photon polarization in B→Xγ in the standard model

Creators

  • 1. Department of Physics, University of California at San Diego, La Jolla, California 92093 (United States)
  • 2. Jefferson Laboratory of Physics, Harvard University, Cambridge, Massachusetts 02138 (United States)
  • 3. Physics Department, Boston University, Boston, Massachusetts 02215 (United States)
  • 4. Department of Physics, Technion-Israel Institute of Technology, Technion City, 32000 Haifa (Israel)
  • 5. Ernest Orlando Lawrence Berkeley National Laboratory, University of California, Berkeley, California 94720 (United States)
  • 6. Center for Theoretical Physics, Massachusetts Institute for Technology, Cambridge, Massachusetts 02139 (United States)

Description

The standard model prediction for the B0→Xs,dγ decay amplitude with a right-handed photon is believed to be tiny, suppressed by ms,d/mb, compared to the amplitude with a left-handed photon. We show that this suppression is fictitious: In inclusive decays, the ratio of these two amplitudes is only suppressed by gs/(4π), and in exclusive decays by ΛQCD/mb. The suppression is not stronger in B0→Xdγ decays than it is in B0→Xsγ. We estimate that the time dependent CP asymmetries in B→K*γ, ργ, KSπ0γ, and π+π-γ are of order 0.1 and that they have significant uncertainties

Additional details

Identifiers

DOI
10.1103/PhysRevD.71.011504;
arXiv
arXiv:hep-ph/0412019v2;

Publishing Information

Journal Title
Physical Review. D, Particles Fields
Journal Volume
71
Journal Issue
1
Journal Page Range
p. 011504-011504.5
ISSN
0556-2821
CODEN
PRVDAQ

INIS

Country of Publication
United States
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
37020874
Subject category
S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
Descriptors DEI
ASYMMETRY; B NEUTRAL MESONS; CP INVARIANCE; DECAY AMPLITUDES; HADRONIC PARTICLE DECAY; K*-892 MESONS; KAONS NEUTRAL SHORT-LIVED; PARTICLE PRODUCTION; PHOTONS; PIONS MINUS; PIONS PLUS; POLARIZATION; QUANTUM CHROMODYNAMICS; QUARKS; REST MASS; RHO-770 MESONS; STANDARD MODEL; TIME DEPENDENCE
Descriptors DEC
AMPLITUDES; B MESONS; BEAUTY MESONS; BEAUTY PARTICLES; BOSONS; DECAY; ELEMENTARY PARTICLES; FERMIONS; FIELD THEORIES; GRAND UNIFIED THEORY; HADRONS; INVARIANCE PRINCIPLES; KAONS; KAONS NEUTRAL; MASS; MASSLESS PARTICLES; MATHEMATICAL MODELS; MESONS; PARTICLE DECAY; PARTICLE MODELS; PIONS; PSEUDOSCALAR MESONS; QUANTUM FIELD THEORY; STRANGE MESONS; STRANGE PARTICLES; TRANSITION AMPLITUDES; UNIFIED GAUGE MODELS; VECTOR MESONS

Optional Information

Notes
(c) 2005 The American Physical Society