Measurement of Ratios of Branching Fractions and CP-Violating Asymmetries of B+/- --> D*K +/- decays

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The authors report a study of B{sup {+-}} {yields} D*K{sup {+-}} decays with D* decaying to D{pi}{sup 0} or D{gamma}, using 383 x 10{sup 6} B{bar B} pairs collected at the {Upsilon}(4S) resonance with the BABAR detector at the SLAC PEP-II B-Factory. The D meson decays under study include a non-CP mode (K{sup {+-}}{pi}{sup {-+}}), CP-even modes (K{sup {+-}}K{sup {-+}}, {pi}{sup {+-}}{pi}{sup {-+}}) and CP-odd modes (K{sub S}{sup 0}{pi}{sup 0}, K{sub S}{sup 0}{phi}, K{sub S}{sup 0}{omega}). They measure ratios (R*{sub CP{+-}}) of branching fractions of decays to CP eigenmode states and to flavor-specific states as well as CP asymmetries A*{sub ... continued below

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12 pages

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Aubert, B.; Bona, M.; Karyotakis, Y.; Lees, J.P.; Poireau, V.; Prencipe, E. et al. August 1, 2008.

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The authors report a study of B{sup {+-}} {yields} D*K{sup {+-}} decays with D* decaying to D{pi}{sup 0} or D{gamma}, using 383 x 10{sup 6} B{bar B} pairs collected at the {Upsilon}(4S) resonance with the BABAR detector at the SLAC PEP-II B-Factory. The D meson decays under study include a non-CP mode (K{sup {+-}}{pi}{sup {-+}}), CP-even modes (K{sup {+-}}K{sup {-+}}, {pi}{sup {+-}}{pi}{sup {-+}}) and CP-odd modes (K{sub S}{sup 0}{pi}{sup 0}, K{sub S}{sup 0}{phi}, K{sub S}{sup 0}{omega}). They measure ratios (R*{sub CP{+-}}) of branching fractions of decays to CP eigenmode states and to flavor-specific states as well as CP asymmetries A*{sub CP{+-}} = -0.11 {+-} 0.09 {+-} 0.01, R*{sub CP+} = 1.31 {+-} 0.13 {+-} 0.04, and A*{sub CP-} = 0.06 {+-} 0.10 {+-} 0.02, R*{sub CP-} = 1.10 {+-} 0.12 {+-} 0.04, where the first error is statistical and the second error is systematic. Translating the results into an alternative parameterization, widely used for related measurements, they obtain x*{sub +} = 0.11 {+-} 0.06 {+-} 0.02 and x*{sub -} = 0.00 {+-} 0.06 {+-} 0.01. No significant CP-violating charge asymmetry is found in either the flavor-specific mode D {yields} K{sup {+-}}{pi}{sup {-+}} or in B{sup {+-}} {yields} D*{pi}{sup {+-}} decays.

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12 pages

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  • Journal Name: Physical Review D

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  • Report No.: SLAC-PUB-13305
  • Grant Number: AC02-76SF00515
  • Office of Scientific & Technical Information Report Number: 935691
  • Archival Resource Key: ark:/67531/metadc899526

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  • August 1, 2008

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  • Sept. 27, 2016, 1:39 a.m.

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  • Nov. 29, 2016, 7:38 p.m.

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Aubert, B.; Bona, M.; Karyotakis, Y.; Lees, J.P.; Poireau, V.; Prencipe, E. et al. Measurement of Ratios of Branching Fractions and CP-Violating Asymmetries of B+/- --> D*K +/- decays, article, August 1, 2008; [Menlo Park, California]. (digital.library.unt.edu/ark:/67531/metadc899526/: accessed September 20, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.