Investigation of Bu, d → (π, K) π decays within unparticle physics

Chuan Hung Chen, C. S. Kim, Yeo Woong Yoon

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Abstract

We investigate the implication of unparticle physics on the Bu, d → (π, K) π decays under the constraints of the Bd, s - over(B, ̄)d, s mixing. We found that not only the unparticle parameters that belong to the flavor changing neutral current (FCNC) processes but also scaling dimension dU could be constrained by the Bd, s - over(B, ̄)d, s mixing phenomenology. Employing the minimum χ2 analysis to the Bu, d → (π, K) π decays with the constraints of Bd, s mixing, we find that the puzzle of large branching ratio for Bd → π0 π0 and the discrepancy between the standard model estimation and data for the direct CP asymmetry of B+ → K+ π0 and Bd → π+ π- can be resolved well. However, the mixing induced CP asymmetry of Bd → KS π0 could not be well accommodated by the unparticle contributions.

Original languageEnglish
Pages (from-to)250-255
Number of pages6
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume671
Issue number2
DOIs
Publication statusPublished - 2009 Jan 19

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All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

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