Determining weak phase gamma and probing new physics in b->s transitions from B->eta(eta')K

Abstract

We present a method of determining weak phase γin the Cabibbo-Kobayashi-Maskawa matrix from decays B->ηK, η' K$alone.Givenalargeratiobetweencolor-suppressedandcolor-allowedtreediagramsextractedfromglobal\pi \pi (K)fits,\gamma isdeterminedfromthecurrentdataof{\eta }^{\prime }KandtheresultisinagreementwiththeglobalStandardModel(SM)fits.However,asmallerratiofromfactorizationbasedcalculationsgives$γ\sim 90^\circ$. New physics beyond the SM can be singled out ifγobtained in η^{(')} K modes is significantly different than the ones from other modes or other approaches. The effective value of γfrom η' K is very sensitive to new physics contributions and can be used to extract new physics parameters for a class of models which do not give contributions to strong phases significantly.

18 pages, 2 figures, version to appear in Eur.Phys.J.C

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• Determining weak phase gamma and probing new physics in b->s transitions from B->eta(eta')K

Cited by in corpus (5)

• Is There Still a B -> pi K Puzzle?
• Bs-->K+K- and Bs-->K0 anti-K0 Decays within Supersymmetry
• Implications of new data in charmless B decays
• U-Spin Tests of the Standard Model and New Physics
• Determining weak phase gamma and probing new physics in b->s transitions from B->eta(eta')K