Probing a scalar singlet-catalyzed electroweak phase transition with resonant di-Higgs boson production in the channel
Abstract
We investigate the prospective reach of the 14 TeV HL-LHC for resonant production of a heavy Higgs boson that decays to two SM-like Higgs bosons in the 4b final state in the scalar singlet extended Standard Model. We focus on the reach for choices of parameters yielding a strong first order electroweak phase transition. The event selection follows the 4b analysis by the ATLAS Collaboration, enhanced with the use of a boosted decision tree method to optimize the discrimination between signal and background events. The output of the multivariate discriminant is used directly in the statistical analysis. The prospective reach of the 4b channel is compatible with previous projections for the bbγγ and 4τ channels for heavy Higgs boson mass m2 below 500 GeV and superior to these channels for m2 > 500 GeV. With 3 ab–1 of integrated luminosity, it is possible to discover the heavy Higgs boson in the 4b channel for m2 < 500 GeV in regions of parameter space yielding a strong first order electroweak phase transition and satisfying all other phenomenological constraints.
- Authors:
- Publication Date:
- Research Org.:
- Univ. of Massachusetts, Amherst, MA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- OSTI Identifier:
- 1572131
- Alternate Identifier(s):
- OSTI ID: 1595340
- Grant/Contract Number:
- SC0011095; SC0010004; 11875003
- Resource Type:
- Published Article
- Journal Name:
- Physical Review. D.
- Additional Journal Information:
- Journal Name: Physical Review. D. Journal Volume: 100 Journal Issue: 7; 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; Baryogenesis & Ieptogenesis; Branching fraction; Extensions of Higgs sector; Hadron colliders; Machine learning
Citation Formats
Li, Hao-Lin, Ramsey-Musolf, Michael J., and Willocq, Stéphane. Probing a scalar singlet-catalyzed electroweak phase transition with resonant di-Higgs boson production in the 4 b channel. United States: N. p., 2019.
Web. doi:10.1103/PhysRevD.100.075035.
Li, Hao-Lin, Ramsey-Musolf, Michael J., & Willocq, Stéphane. Probing a scalar singlet-catalyzed electroweak phase transition with resonant di-Higgs boson production in the 4 b channel. United States. https://doi.org/10.1103/PhysRevD.100.075035
Li, Hao-Lin, Ramsey-Musolf, Michael J., and Willocq, Stéphane. Mon .
"Probing a scalar singlet-catalyzed electroweak phase transition with resonant di-Higgs boson production in the 4 b channel". United States. https://doi.org/10.1103/PhysRevD.100.075035.
@article{osti_1572131,
title = {Probing a scalar singlet-catalyzed electroweak phase transition with resonant di-Higgs boson production in the 4 b channel},
author = {Li, Hao-Lin and Ramsey-Musolf, Michael J. and Willocq, Stéphane},
abstractNote = {We investigate the prospective reach of the 14 TeV HL-LHC for resonant production of a heavy Higgs boson that decays to two SM-like Higgs bosons in the 4b final state in the scalar singlet extended Standard Model. We focus on the reach for choices of parameters yielding a strong first order electroweak phase transition. The event selection follows the 4b analysis by the ATLAS Collaboration, enhanced with the use of a boosted decision tree method to optimize the discrimination between signal and background events. The output of the multivariate discriminant is used directly in the statistical analysis. The prospective reach of the 4b channel is compatible with previous projections for the bbγγ and 4τ channels for heavy Higgs boson mass m2 below 500 GeV and superior to these channels for m2 > 500 GeV. With 3 ab–1 of integrated luminosity, it is possible to discover the heavy Higgs boson in the 4b channel for m2 < 500 GeV in regions of parameter space yielding a strong first order electroweak phase transition and satisfying all other phenomenological constraints.},
doi = {10.1103/PhysRevD.100.075035},
journal = {Physical Review. D.},
number = 7,
volume = 100,
place = {United States},
year = {Mon Oct 28 00:00:00 EDT 2019},
month = {Mon Oct 28 00:00:00 EDT 2019}
}
https://doi.org/10.1103/PhysRevD.100.075035
Web of Science
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