Measurements of Time-Dependent CP Violation in Radiative B Decays at BaBar

Conference · Fri Dec 11 00:00:00 EST 2009

OSTI ID:969259

Lazzaro, A

The authors present measurements of the CP-violation parameters S and C for the radiative decays B{sup 0} {yields} {pi}{sup 0}K{sub S}{sup 0}{gamma} and B{sup 0} {yields} {eta}K{sub S}{sup 0}{gamma}; for B {yields} {eta}K{gamma} they also measure the branching fractions and for B{sup +} {yields} {eta}K{sup +}{gamma} the time-integrated charge asymmetry A{sub ch}. The data, collected with the BABAR detector at the SLAC National Accelerator Laboratory, represent 467 x 10{sup 6} B{bar B} pairs produced in e{sup +}e{sup -} annihilation at the PEP-II collider. In this summary they present an updated measurement of the time-dependent CP asymmetry in B{sup 0} {yields} {pi}{sup 0}K{sub S}{sup 0}{gamma} decay mode and the first measurement of the time-dependent CP asymmetry in B{sup 0} {yields} {eta}K{sub S}{sup 0}{gamma} decay mode. Hadronic corrections in B{sup 0} {yields} {pi}{sup 0}K{sub S}{sup 0}{gamma} decay mode might permit S to be as large as {+-} 0.1. Such corrections and NP effects could depend on m({pi}{sup 0}K{sub S}{sup 0}), so they split the data into two parts: the K*(892) region with 0.8 < m({pi}{sup 0}K{sub S}{sup 0}) < 1.0 GeV/c{sup 2} and the non-K*(892) region with 1.1 < m({pi}{sup 0}K{sub S}{sup 0}) < 1.8 GeV/c{sup 2}. They also report updated measurements of branching fractions for the decay modes B{sup 0} {yields} {eta}K{sup 0}{gamma} and B{sup +} {yields} {eta}K{sup +}{gamma} and time-integrated charge-asymmetry for B{sup +} {yields} {eta}K{sup +}{gamma}.

• Research Organization: Stanford Linear Accelerator Center (SLAC)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC02-76SF00515
• OSTI ID: 969259
• Report Number(s): SLAC-PUB-13805
• Conference Information: Presented at 17th International Conference on Supersymmetry and the Unification of Fundamental Interactions (SUSY 09), Boston, Massachusetts, 5-10 Jun 2009
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
ANNIHILATION
ASYMMETRY
DECAY
Experiment-HEP
HEPEX
FERMILAB ACCELERATOR
RADIATIVE DECAY
STANFORD LINEAR ACCELERATOR CENTER
SUPERSYMMETRY