Diagnostic for new physics in B -> pi K decays

Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/38925

Title:	Diagnostic for new physics in B -> pi K decays
Authors:	Baek,S;Chiang,CW;Gronau,M;London,D;Rosner,JL
Contributors:	物理研究所
Keywords:	ELECTROWEAK PENGUIN;ISOSPIN ANALYSIS;CP ASYMMETRIES;SUM-RULE;PARAMETERS;VIOLATION;MESONS;PUZZLE;GAMMA;PHASE
Date:	2009
Issue Date:	2010-07-08 13:59:23 (UTC+8)
Publisher:	中央大學
Abstract:	A recent analysis of B 7 K decays concludes that present data do not clearly indicate whether (i) the standard model (or Delta l= 0 new physics) is sufficient. or (ii) Delta l = 1 new physics is needed. We show that these two possibilities can be distinguished by whether a sum rule relating the CP asymmetries of the four B -> pi K decays is valid. If case (i) is favored, the sum rule holds, and one predicts A(Cp)(pi K-0(0)) = -0,15, while in case (ii) fits to new physics involving large values of a color-suppressed tree amplitude entail A(Cp)(pi K-0(0)) = -0.03. The Current experimental average A(Cp)(pi K-0(0)) = -0.01 +/- 0.10 must be measured a factor of at least three times more precisely in order to distinguish between the two cases. (C) 2009 Elsevier B.V. All rights reserved.
Relation:	PHYSICS LETTERS B
Appears in Collections:	[Graduate Institute of Physics] journal & Dissertation

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