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

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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} ... continued below

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4 pages

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Lazzaro, A. & /Milan U. /INFN, Milan December 11, 2009.

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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}.

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4 pages

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  • Presented at 17th International Conference on Supersymmetry and the Unification of Fundamental Interactions (SUSY 09), Boston, Massachusetts, 5-10 Jun 2009

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  • Report No.: SLAC-PUB-13805
  • Grant Number: AC02-76SF00515
  • Office of Scientific & Technical Information Report Number: 969259
  • Archival Resource Key: ark:/67531/metadc927236

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Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • December 11, 2009

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  • Nov. 13, 2016, 7:26 p.m.

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  • Dec. 15, 2016, 3:38 p.m.

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Lazzaro, A. & /Milan U. /INFN, Milan. Measurements of Time-Dependent CP Violation in Radiative B Decays at BaBar, article, December 11, 2009; United States. (digital.library.unt.edu/ark:/67531/metadc927236/: accessed December 15, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.