Effective theories of universal theories
It is wellknown but sometimes overlooked that constraints on the oblique parameters (most notably S and T parameters) are generally speaking only applicable to a special class of new physics scenarios known as universal theories. The oblique parameters should not be associated with Wilson coefficients in a particular operator basis in the effective field theory (EFT) framework, unless restrictions have been imposed on the EFT so that it describes universal theories. Here, we work out these restrictions, and present a detailed EFT analysis of universal theories. We find that at the dimension6 level, universal theories are completely characterized by 16 parameters. They are conveniently chosen to be: 5 oblique parameters that agree with the commonlyadopted ones, 4 anomalous triplegauge couplings, 3 rescaling factors for the h ^{3}, hff, hV V vertices, 3 parameters for hV V vertices absent in the Standard Model, and 1 fourfermion coupling of order yf ^{2}. Furthermore, all these parameters are defined in an unambiguous and basisindependent way, allowing for consistent constraints on the universal theories parameter space from precision electroweak and Higgs data.
 Authors:

^{[1]};
^{[1]}
 Univ. of Michigan, Ann Arbor, MI (United States). Michigan Center for Theoretical Physics
 Publication Date:
 Grant/Contract Number:
 SC0007859
 Type:
 Accepted Manuscript
 Journal Name:
 Journal of High Energy Physics (Online)
 Additional Journal Information:
 Journal Name: Journal of High Energy Physics (Online); Journal Volume: 2016; Journal Issue: 1; Journal ID: ISSN 10298479
 Publisher:
 Springer Berlin
 Research Org:
 Univ. of Michigan, Ann Arbor, MI (United States)
 Sponsoring Org:
 USDOE Office of Science (SC)
 Country of Publication:
 United States
 Language:
 English
 Subject:
 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; effective field theories; Higgs physics; standard model; beyond standard model
 OSTI Identifier:
 1327310
Wells, James D., and Zhang, Zhengkang. Effective theories of universal theories. United States: N. p.,
Web. doi:10.1007/JHEP01(2016)123.
Wells, James D., & Zhang, Zhengkang. Effective theories of universal theories. United States. doi:10.1007/JHEP01(2016)123.
Wells, James D., and Zhang, Zhengkang. 2016.
"Effective theories of universal theories". United States.
doi:10.1007/JHEP01(2016)123. https://www.osti.gov/servlets/purl/1327310.
@article{osti_1327310,
title = {Effective theories of universal theories},
author = {Wells, James D. and Zhang, Zhengkang},
abstractNote = {It is wellknown but sometimes overlooked that constraints on the oblique parameters (most notably S and T parameters) are generally speaking only applicable to a special class of new physics scenarios known as universal theories. The oblique parameters should not be associated with Wilson coefficients in a particular operator basis in the effective field theory (EFT) framework, unless restrictions have been imposed on the EFT so that it describes universal theories. Here, we work out these restrictions, and present a detailed EFT analysis of universal theories. We find that at the dimension6 level, universal theories are completely characterized by 16 parameters. They are conveniently chosen to be: 5 oblique parameters that agree with the commonlyadopted ones, 4 anomalous triplegauge couplings, 3 rescaling factors for the h3, hff, hV V vertices, 3 parameters for hV V vertices absent in the Standard Model, and 1 fourfermion coupling of order yf2. Furthermore, all these parameters are defined in an unambiguous and basisindependent way, allowing for consistent constraints on the universal theories parameter space from precision electroweak and Higgs data.},
doi = {10.1007/JHEP01(2016)123},
journal = {Journal of High Energy Physics (Online)},
number = 1,
volume = 2016,
place = {United States},
year = {2016},
month = {1}
}