Axigluon on like-sign charge asymmetry Aslb, FCNCs and CP asymmetries in B decays

Chuan Hung Chen; Gaber Faisel

doi:10.1016/j.physletb.2011.01.010

Axigluon on like-sign charge asymmetry A_sl^b, FCNCs and CP asymmetries in B decays

Chuan Hung Chen, Gaber Faisel

Department of Physics

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

10 Citations (Scopus)

Abstract

A non-universal axigluon in generalized chiral color models leads to flavor changing neutral currents (FCNCs) at tree level. We analyze phenomenologically the new contributions to B_q (q=d,s) mixing and the related CP asymmetries (CPAs) that are generated by axigluon exchange. We find that although Δm_Bq can give a strict constraint on the parameters of b→q transition, the precise measurement of sin2β_J/ΨK0 can further exclude the parameter space of b→d transition. The axigluon-mediated effects can enhance the like-sign dimuon charge asymmetry A_sl^b by one order of magnitude larger than the standard model prediction. Accordingly, large CPA sin2β_s^J/Ψφ and CPA difference sin2β_JψK0-sin2β_φK0 are achieved.

Original language	English
Pages (from-to)	487-494
Number of pages	8
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	696
Issue number	5
DOIs	https://doi.org/10.1016/j.physletb.2011.01.010
Publication status	Published - 2011 Feb 14

All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics

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title = "Axigluon on like-sign charge asymmetry Aslb, FCNCs and CP asymmetries in B decays",

abstract = "A non-universal axigluon in generalized chiral color models leads to flavor changing neutral currents (FCNCs) at tree level. We analyze phenomenologically the new contributions to Bq (q=d,s) mixing and the related CP asymmetries (CPAs) that are generated by axigluon exchange. We find that although ΔmBq can give a strict constraint on the parameters of b→q transition, the precise measurement of sin2βJ/ΨK0 can further exclude the parameter space of b→d transition. The axigluon-mediated effects can enhance the like-sign dimuon charge asymmetry Aslb by one order of magnitude larger than the standard model prediction. Accordingly, large CPA sin2βsJ/Ψφ and CPA difference sin2βJψK0-sin2βφK0 are achieved.",

author = "Chen, {Chuan Hung} and Gaber Faisel",

note = "Funding Information: This work is supported by the National Science Council of R.O.C. under Grant No. NSC-97-2112-M-006-001-MY3 . The author C.-H.C. would like to thank Prof. Young-Chung Hsue for his help on using plot tool. G. Faisel would like to thank the National Center for Theoretical Sciences (NCTS) at Cheng Kung University for the hospitality where this work has been done.",

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doi = "10.1016/j.physletb.2011.01.010",

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AU - Chen, Chuan Hung

AU - Faisel, Gaber

N1 - Funding Information: This work is supported by the National Science Council of R.O.C. under Grant No. NSC-97-2112-M-006-001-MY3 . The author C.-H.C. would like to thank Prof. Young-Chung Hsue for his help on using plot tool. G. Faisel would like to thank the National Center for Theoretical Sciences (NCTS) at Cheng Kung University for the hospitality where this work has been done.

PY - 2011/2/14

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N2 - A non-universal axigluon in generalized chiral color models leads to flavor changing neutral currents (FCNCs) at tree level. We analyze phenomenologically the new contributions to Bq (q=d,s) mixing and the related CP asymmetries (CPAs) that are generated by axigluon exchange. We find that although ΔmBq can give a strict constraint on the parameters of b→q transition, the precise measurement of sin2βJ/ΨK0 can further exclude the parameter space of b→d transition. The axigluon-mediated effects can enhance the like-sign dimuon charge asymmetry Aslb by one order of magnitude larger than the standard model prediction. Accordingly, large CPA sin2βsJ/Ψφ and CPA difference sin2βJψK0-sin2βφK0 are achieved.

AB - A non-universal axigluon in generalized chiral color models leads to flavor changing neutral currents (FCNCs) at tree level. We analyze phenomenologically the new contributions to Bq (q=d,s) mixing and the related CP asymmetries (CPAs) that are generated by axigluon exchange. We find that although ΔmBq can give a strict constraint on the parameters of b→q transition, the precise measurement of sin2βJ/ΨK0 can further exclude the parameter space of b→d transition. The axigluon-mediated effects can enhance the like-sign dimuon charge asymmetry Aslb by one order of magnitude larger than the standard model prediction. Accordingly, large CPA sin2βsJ/Ψφ and CPA difference sin2βJψK0-sin2βφK0 are achieved.

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JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

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