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Impact of a CP-Violating Higgs Sector: From LHC to Baryogenesis

Shu, Jing and Zhang, Yue-Yang (2013) Impact of a CP-Violating Higgs Sector: From LHC to Baryogenesis. Physical Review Letters, 111 (9). Art. No. 091801 . ISSN 0031-9007. doi:10.1103/PhysRevLett.111.091801.

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We observe a generic connection between LHC Higgs data and electroweak baryogenesis: the particle that contributes to the CP-odd hgg or hγγ vertex would provide the CP-violating source during a first-order phase transition. It is illustrated in the two Higgs doublet model that a common complex phase controls the lightest Higgs properties at the LHC, electric dipole moments, and the CP-violating source for electroweak baryogenesis. We perform a general parametrization of Higgs effective couplings and a global fit to the LHC Higgs data. Current LHC measurements prefer a nonzero phase for tan β≲1 and electric dipole moment constraints still allow an order-one phase for tan β∼1, which gives sufficient room to generate the correct cosmic baryon asymmetry. We also give some prospects in the direct measurements of CP violation in the Higgs sector at the LHC.

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Additional Information:© 2013 American Physical Society. Received 13 April 2013; revised manuscript received 4 July 2013; published 27 August 2013. We thank Q. H. Cao, C. Cheung, T. Liu, M. Ramsey- Musolf, and M. B. Wise for useful discussions and especially J. Zupan for the collaboration at the early stage. Y. Z. acknowledges the hospitality from the Institute of Theoretical Physics and Kavli Institute for Theoretical Physics China where part of the work has been done. The research of Y. Z. is funded by the Gordon and Betty Moore Foundation through Grant No. 776 to the Caltech Moore Center for Theoretical Cosmology and Physics and in part by the U.S. DOE Grant No. DE-FG02-92ER40701.
Group:Caltech Theory, Moore Center for Theoretical Cosmology and Physics
Funding AgencyGrant Number
Gordon and Betty Moore Foundation776
Department of Energy (DOE)DE-FG02-92ER40701
Issue or Number:9
Classification Code:PACS: 12.60.Fr, 11.30.Er, 11.30.Fs, 31.30.jn
Record Number:CaltechAUTHORS:20130924-111407015
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:41501
Deposited By: Tony Diaz
Deposited On:24 Sep 2013 19:51
Last Modified:10 Nov 2021 04:31

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