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

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

doi:10.1016/j.physletb.2008.04.058

B_s⁰ - over(B, ̄)_s⁰ mixing and B → π K decays in stringy leptophobic Z^′

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

Department of Physics

Research output: Contribution to journal › Article › peer-review

21 Citations (Scopus)

Abstract

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 B_s - 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 language	English
Pages (from-to)	84-91
Number of pages	8
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	664
Issue number	1-2
DOIs	https://doi.org/10.1016/j.physletb.2008.04.058
Publication status	Published - 2008 Jun 12

Bibliographical note

Funding Information:
The work of C.S.K. was supported in part by CHEP-SRC Program, and in part by the Korea Research Foundation Grant funded by the Korean Government (MOEHRD) No. KRF-2005-070-C00030. The work was supported in part by the Korea Research Foundation Grant funded by the Korean Government (MOEHRD) No. KRF-2007-359-C00009 (SB). J.H.J. was supported by the National Graduate Science & Technology Scholarship funded by the Korean Government.

All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics

Access to Document

10.1016/j.physletb.2008.04.058

Cite this

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title = "Bs0 - over(B,{\= })s0 mixing and B → π K decays in stringy leptophobic Z′",

abstract = "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.",

author = "Seungwon Baek and Jeon, {Jong Hun} and Kim, {C. S.}",

note = "Funding Information: The work of C.S.K. was supported in part by CHEP-SRC Program, and in part by the Korea Research Foundation Grant funded by the Korean Government (MOEHRD) No. KRF-2005-070-C00030. The work was supported in part by the Korea Research Foundation Grant funded by the Korean Government (MOEHRD) No. KRF-2007-359-C00009 (SB). J.H.J. was supported by the National Graduate Science & Technology Scholarship funded by the Korean Government. ",

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T1 - Bs0 - over(B, ̄)s0 mixing and B → π K decays in stringy leptophobic Z′

AU - Baek, Seungwon

AU - Jeon, Jong Hun

AU - Kim, C. S.

N1 - Funding Information: The work of C.S.K. was supported in part by CHEP-SRC Program, and in part by the Korea Research Foundation Grant funded by the Korean Government (MOEHRD) No. KRF-2005-070-C00030. The work was supported in part by the Korea Research Foundation Grant funded by the Korean Government (MOEHRD) No. KRF-2007-359-C00009 (SB). J.H.J. was supported by the National Graduate Science & Technology Scholarship funded by the Korean Government.

PY - 2008/6/12

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N2 - 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.

AB - 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.

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