Bs0 - over(B, ̄)s0 mixing and B → π K decays in stringy leptophobic Z

Seungwon Baek, Jong Hun Jeon, C. S. Kim

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18 Citations (Scopus)


We consider a leptophobic Z scenario in a flipped SU(5) grand unified theory obtained from heterotic string theory. We show that the allowed Z mass, flavor conserving and flavor changing couplings of the Z to the down-type quarks are strongly constrained by the mass difference in Bs - over(B, -)s system and the four branching ratios of B → π K decays. It is shown that even under these constraints large deviations in direct and/or indirect CP asymmetries of B → π K decays from the SM expectations are allowed. Especially it is possible to accommodate the apparent puzzling data in B → π K CP asymmetries.

Original languageEnglish
Pages (from-to)84-91
Number of pages8
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Issue number1-2
Publication statusPublished - 2008 Jun 12

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

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