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High Energy Physics - Phenomenology

arXiv:0803.0062 (hep-ph)
[Submitted on 1 Mar 2008 (v1), last revised 17 Mar 2008 (this version, v3)]

Title:B_s^0-\bar{B}_s^0 mixing and B -> πK decays in stringy leptophobic Z^\prime

Authors:Seungwon Baek (Korea U.), Jong Hun Jeon, C.S. Kim (Yonsei U.)
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Abstract: We consider a leptophobic Z^\prime scenario in a flipped SU(5) grand unified theory obtained from heterotic string theory. We show that the allowed Z^\prime mass, flavor conserving and flavor changing couplings of the Z^\prime to the down-type quarks are strongly constrained by the mass difference in B_s-\bar{B}_s system and the four branching ratios of B -> \pi K decays. It is shown that even under these constraints large deviations in direct and/or indirect CP asymmetries of B \to \pi K decays from the SM expectations are allowed. Especially it is possible to accommodate the apparent puzzling data in B -> \pi K CP asymmetries.
Comments: 16 pages, 16 figures, LateX
Subjects: High Energy Physics - Phenomenology (hep-ph)
Cite as: arXiv:0803.0062 [hep-ph]
  (or arXiv:0803.0062v3 [hep-ph] for this version)
  https://doi.org/10.48550/arXiv.0803.0062
Journal reference: Phys.Lett.B664:84-91,2008
Related DOI: https://doi.org/10.1016/j.physletb.2008.04.058

Submission history

From: Jonghun Jeon [view email]
[v1] Sat, 1 Mar 2008 11:53:00 UTC (265 KB)
[v2] Tue, 4 Mar 2008 06:19:05 UTC (265 KB)
[v3] Mon, 17 Mar 2008 09:44:02 UTC (265 KB)
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