Constraints on the CKM angle gamma in B^0 --> barD^0 (D^0) K^*0 from a Dalitz analysis of D^0 --> K_S pi^+ pi^-

Abstract

We present constraints on the angle gamma of the Unitarity Triangle with a Dalitz analysis of neutral D decays to K_Spi^+pi^- from the processes B^0 -> barD^0 K^*0 (barB^0 -> D^0 barK^*0) and B0 -> D0 K*0 (barB^0 -> barD^0 barK^*0) with K^*0 -> K^+pi^- (barK^*0 -> K^-pi^+). Using a sample of 371 10^6 BBbar pairs collected with the Babar detector at PEP-II, we measure the angle gamma as a function of r_S, the magnitude of the average ratio between b -> u and b -> c amplitudes. Combining this result with the available information on r_S, we obtain gamma = (162 +- 56) degrees or (342 +- 56) degrees and r_S<0.55 at 95% probability.

8 pages (authors list included), 8 postscript figures. Submitted to Phys. Rev. D (Rapid Communications). Contributed to XLIIIrd Rencontres de Moriond Electroweak Interactions And Unified Theories in La Thuile, Italy March 1st-8th, 2008

References in corpus (3)

• Improved measurement of the CKM angle gamma in B^-+ -> D^(*) K^(*)-+ decays with a Dalitz plot analysis of D decays to K_S^0 pi^+ pi^- and K_S^0 K^+ K^-
• Improved Measurement of CP Violation in Neutral B Decays to c cbar s
• Measurement of B0bar -> D(*)0 K(*)0bar Branching Fractions

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