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Title: Probing the electroweak phase transition via enhanced di-Higgs boson production

Abstract

Here, we consider a singlet extension of the Standard Model (SM) with a spontaneous $$Z_2$$ breaking and study the gluon-gluon fusion production of the heavy scalar, with subsequent decay into a pair of SM-like Higgs bosons. We find that an on-shell interference effect can notably enhance the resonant di-Higgs production rate up to 40\%. In addition, consistently taking into account both the on-shell and off-shell interference effects between the heavy scalar and the SM di-Higgs diagrams significantly improves the HL-LHC and HE-LHC reach in this channel. As an example, within an effective field theory analysis in an explicitly $$Z_2$$ breaking scenario, we further discuss the potential to probe the parameter region compatible with a first order electroweak phase transition. Our analysis is applicable for general potentials of the singlet extension of the SM as well as for more general resonance searches.

Authors:
 [1]; ORCiD logo [2];  [3]
  1. Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States); Univ. of Chicago, Chicago, IL (United States)
  2. Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
  3. Univ. Autonoma de Barcelona, Barcelona (Spain); Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany)
Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
OSTI Identifier:
1438968
Alternate Identifier(s):
OSTI ID: 1426670
Report Number(s):
FERMILAB-PUB-17-600-T; arXiv:1801.00794
Journal ID: ISSN 2470-0010; PRVDAQ; 1645911; TRN: US1802322
Grant/Contract Number:  
AC02-07CH11359
Resource Type:
Published Article
Journal Name:
Physical Review D
Additional Journal Information:
Journal Volume: 97; Journal Issue: 9; Journal ID: ISSN 2470-0010
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

Carena, Marcela, Liu, Zhen, and Riembau, Marc. Probing the electroweak phase transition via enhanced di-Higgs boson production. United States: N. p., 2018. Web. doi:10.1103/PhysRevD.97.095032.
Carena, Marcela, Liu, Zhen, & Riembau, Marc. Probing the electroweak phase transition via enhanced di-Higgs boson production. United States. doi:10.1103/PhysRevD.97.095032.
Carena, Marcela, Liu, Zhen, and Riembau, Marc. Thu . "Probing the electroweak phase transition via enhanced di-Higgs boson production". United States. doi:10.1103/PhysRevD.97.095032.
@article{osti_1438968,
title = {Probing the electroweak phase transition via enhanced di-Higgs boson production},
author = {Carena, Marcela and Liu, Zhen and Riembau, Marc},
abstractNote = {Here, we consider a singlet extension of the Standard Model (SM) with a spontaneous $Z_2$ breaking and study the gluon-gluon fusion production of the heavy scalar, with subsequent decay into a pair of SM-like Higgs bosons. We find that an on-shell interference effect can notably enhance the resonant di-Higgs production rate up to 40\%. In addition, consistently taking into account both the on-shell and off-shell interference effects between the heavy scalar and the SM di-Higgs diagrams significantly improves the HL-LHC and HE-LHC reach in this channel. As an example, within an effective field theory analysis in an explicitly $Z_2$ breaking scenario, we further discuss the potential to probe the parameter region compatible with a first order electroweak phase transition. Our analysis is applicable for general potentials of the singlet extension of the SM as well as for more general resonance searches.},
doi = {10.1103/PhysRevD.97.095032},
journal = {Physical Review D},
number = 9,
volume = 97,
place = {United States},
year = {2018},
month = {5}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1103/PhysRevD.97.095032

Citation Metrics:
Cited by: 7 works
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