Signal of right-handed charged gauge bosons at the LHC?

Deppisch, F F and Gonzalo, T E and Patra, S and Sahu, Narendra and Sarkar, U (2014) Signal of right-handed charged gauge bosons at the LHC? Physical Review D, 90 (5). ISSN 1550-7998

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We point out that the recent excess observed in searches for a right-handed gauge boson WR at CMS can be explained in a left-right symmetric model with D-parity violation. In a class of SO(10) models, in which D parity is broken at a high scale, the left-right gauge symmetry breaking scale is naturally small, and at a few TeV the gauge coupling constants satisfy gR≈0.6gL. Such models therefore predict a right-handed charged gauge boson WR in the TeV range with a suppressed gauge coupling as compared to the usually assumed manifest left-right symmetry case gR=gL. The recent CMS data show excess events which are consistent with the cross section predicted in the D-parity breaking model for 1.9TeV<MWR<2.4TeV. If the excess is confirmed, it would in general be a direct signal of new physics beyond the Standard Model at the LHC. A TeV scale WR would for example not only rule out SU(5) grand unified theory models. It would also imply B-L violation at the TeV scale, which would be the first evidence for baryon or lepton number violation in nature, and it has strong implications on the generation of neutrino masses and the baryon asymmetry in the Universe.

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Additional Information: The work of F. F. D. and T. E. G. was supported partly by the London Centre for Terauniverse Studies (LCTS), using funding from the European Research Council via the Advanced Investigator Grant No. 267352. F. F. D. would like to thank Abhiraami Navaneethanathan for useful discussions and for the help in compiling the analysis data. The work of S. P. is supported by the Department of Science and Technology, Government of India under the financial Grant No. SERB/F/482/2014-15. N. S. is partially supported by the Department of Science and Technology Grant No. SR/FTP/PS-209/2011. The work of U. S. is partially supported by the J. C. Bose National Fellowship grant from the Department of Science and Technology, India.
Subjects: Physics > Astronomy Astrophysics
Divisions: Department of Mechanical & Aerospace Engineering
Depositing User: Team Library
Date Deposited: 24 Nov 2014 11:41
Last Modified: 16 May 2018 09:49
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