Bs0 - over(B, ̄)s0 mixing in leptophobic Z′ model

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

doi:10.1016/j.physletb.2006.08.041

B_s⁰ - over(B, ̄)_s⁰ mixing in leptophobic Z^′ model

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

Department of Physics

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

48 Citations (Scopus)

Abstract

Leptophobic Z^′ gauge boson appears naturally in many grand unified theories, such as flipped SU (5) or string-inspired E₆ models. This elusive particle easily escapes the direct/indirect detections because it does not couple to charged leptons. However, it can generate flavor changing neutral current at tree level. In this Letter, we show that the recently measured mass difference, Δ m_s, in the B_s⁰ - over(B, ̄)_s⁰ system improves the previous bound of flavor changing effective coupling by about one order of magnitude, i.e. irrespective of its phase, | U_sb^Z′ | ≤ 0.036 for M_Z= 700 = GeV, and | U_sb^Z′ | ≤ 0.051 for M_Z =1 TeV.

Original language	English
Pages (from-to)	183-188
Number of pages	6
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	641
Issue number	2
DOIs	https://doi.org/10.1016/j.physletb.2006.08.041
Publication status	Published - 2006 Oct 5

Bibliographical note

Funding Information:
We thank Sechul Oh for careful reading of the manuscript and his valuable comments. The work of C.S.K. was supported in part by CHEP-SRC Program, in part by the Korea Research Foundation Grant funded by the Korean Government (MOEHRD) No. KRF-2005-070-C00030. The work of S.B. was supported by the Korea Research Foundation Grant funded by the Korean Government (MOEHRD) No. KRF-2005-070-C00030. J.H.J. was supported by BK21 Program of Korean Government.

All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics

Access to Document

10.1016/j.physletb.2006.08.041

Cite this

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title = "Bs0 - over(B,{\= })s0 mixing in leptophobic Z′ model",

abstract = "Leptophobic Z′ gauge boson appears naturally in many grand unified theories, such as flipped SU (5) or string-inspired E6 models. This elusive particle easily escapes the direct/indirect detections because it does not couple to charged leptons. However, it can generate flavor changing neutral current at tree level. In this Letter, we show that the recently measured mass difference, Δ ms, in the Bs0 - over(B,{\= })s0 system improves the previous bound of flavor changing effective coupling by about one order of magnitude, i.e. irrespective of its phase, | UsbZ′ | ≤ 0.036 for MZ= 700 = GeV, and | UsbZ′ | ≤ 0.051 for MZ =1 TeV.",

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

note = "Funding Information: We thank Sechul Oh for careful reading of the manuscript and his valuable comments. The work of C.S.K. was supported in part by CHEP-SRC Program, in part by the Korea Research Foundation Grant funded by the Korean Government (MOEHRD) No. KRF-2005-070-C00030. The work of S.B. was supported by the Korea Research Foundation Grant funded by the Korean Government (MOEHRD) No. KRF-2005-070-C00030. J.H.J. was supported by BK21 Program of Korean Government.",

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AU - Baek, Seungwon

AU - Jeon, Jong Hun

AU - Kim, C. S.

N1 - Funding Information: We thank Sechul Oh for careful reading of the manuscript and his valuable comments. The work of C.S.K. was supported in part by CHEP-SRC Program, in part by the Korea Research Foundation Grant funded by the Korean Government (MOEHRD) No. KRF-2005-070-C00030. The work of S.B. was supported by the Korea Research Foundation Grant funded by the Korean Government (MOEHRD) No. KRF-2005-070-C00030. J.H.J. was supported by BK21 Program of Korean Government.

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N2 - Leptophobic Z′ gauge boson appears naturally in many grand unified theories, such as flipped SU (5) or string-inspired E6 models. This elusive particle easily escapes the direct/indirect detections because it does not couple to charged leptons. However, it can generate flavor changing neutral current at tree level. In this Letter, we show that the recently measured mass difference, Δ ms, in the Bs0 - over(B, ̄)s0 system improves the previous bound of flavor changing effective coupling by about one order of magnitude, i.e. irrespective of its phase, | UsbZ′ | ≤ 0.036 for MZ= 700 = GeV, and | UsbZ′ | ≤ 0.051 for MZ =1 TeV.

AB - Leptophobic Z′ gauge boson appears naturally in many grand unified theories, such as flipped SU (5) or string-inspired E6 models. This elusive particle easily escapes the direct/indirect detections because it does not couple to charged leptons. However, it can generate flavor changing neutral current at tree level. In this Letter, we show that the recently measured mass difference, Δ ms, in the Bs0 - over(B, ̄)s0 system improves the previous bound of flavor changing effective coupling by about one order of magnitude, i.e. irrespective of its phase, | UsbZ′ | ≤ 0.036 for MZ= 700 = GeV, and | UsbZ′ | ≤ 0.051 for MZ =1 TeV.

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