skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Singlet-catalyzed electroweak phase transitions in the 100 TeV frontier

Abstract

We study the prospects for probing a gauge singlet scalar-driven strong first-order electroweak phase transition with a future proton-proton collider in the 100 TeV range. Singlet-Higgs mixing enables resonantly enhanced di-Higgs production, potentially aiding discovery prospects. We perform Monte Carlo scans of the parameter space to identify regions associated with a strong first-order electroweak phase transition, analyze the corresponding di-Higgs signal, and select a set of benchmark points that span the range of di-Higgs signal strengths. For the b$$\bar{b}$$γγ and 4τ final states, we investigate discovery prospects for each benchmark point for the high-luminosity phase of the Large Hadron Collider and for a future pp collider with s=50, 100, or 200 TeV. We find that any of these future collider scenarios could significantly extend the reach beyond that of the high-luminosity LHC, and that with s=100 TeV (200 TeV) and 30 ab -1, the full region of parameter space favorable to strong first-order electroweak phase transitions is almost fully (fully) discoverable.

Authors:
 [1];  [2];  [3];  [2]
  1. Duke Univ., Durham, NC (United States)
  2. Univ. of Massachusetts, Amherst, MA (United States)
  3. Univ. of Sussex, Brighton (United Kingdom)
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:
1354878
Report Number(s):
ACFI-T16-12; FERMILAB-PUB-16-670; arXiv:1605.06123
Journal ID: ISSN 2470-0010; 1463286
Grant/Contract Number:
AC02-07CH11359; SC0011095
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physical Review D
Additional Journal Information:
Journal Volume: 94; Journal Issue: 3; 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

Kotwal, Ashutosh V., Ramsey-Musolf, Michael J., No, Jose Miguel, and Winslow, Peter. Singlet-catalyzed electroweak phase transitions in the 100 TeV frontier. United States: N. p., 2016. Web. doi:10.1103/PhysRevD.94.035022.
Kotwal, Ashutosh V., Ramsey-Musolf, Michael J., No, Jose Miguel, & Winslow, Peter. Singlet-catalyzed electroweak phase transitions in the 100 TeV frontier. United States. doi:10.1103/PhysRevD.94.035022.
Kotwal, Ashutosh V., Ramsey-Musolf, Michael J., No, Jose Miguel, and Winslow, Peter. 2016. "Singlet-catalyzed electroweak phase transitions in the 100 TeV frontier". United States. doi:10.1103/PhysRevD.94.035022. https://www.osti.gov/servlets/purl/1354878.
@article{osti_1354878,
title = {Singlet-catalyzed electroweak phase transitions in the 100 TeV frontier},
author = {Kotwal, Ashutosh V. and Ramsey-Musolf, Michael J. and No, Jose Miguel and Winslow, Peter},
abstractNote = {We study the prospects for probing a gauge singlet scalar-driven strong first-order electroweak phase transition with a future proton-proton collider in the 100 TeV range. Singlet-Higgs mixing enables resonantly enhanced di-Higgs production, potentially aiding discovery prospects. We perform Monte Carlo scans of the parameter space to identify regions associated with a strong first-order electroweak phase transition, analyze the corresponding di-Higgs signal, and select a set of benchmark points that span the range of di-Higgs signal strengths. For the b$\bar{b}$γγ and 4τ final states, we investigate discovery prospects for each benchmark point for the high-luminosity phase of the Large Hadron Collider and for a future pp collider with s=50, 100, or 200 TeV. We find that any of these future collider scenarios could significantly extend the reach beyond that of the high-luminosity LHC, and that with s=100 TeV (200 TeV) and 30 ab-1, the full region of parameter space favorable to strong first-order electroweak phase transitions is almost fully (fully) discoverable.},
doi = {10.1103/PhysRevD.94.035022},
journal = {Physical Review D},
number = 3,
volume = 94,
place = {United States},
year = 2016,
month = 8
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Citation Metrics:
Cited by: 3works
Citation information provided by
Web of Science

Save / Share:
  • Cited by 3
  • Cited by 38
  • We analyze the collider signatures of the real singlet extension of the Standard Model in regions consistent with a strong first-order electroweak phase transition and a singlet-like scalar heavier than the Standard Model-like Higgs. A definitive correlation exists between the strength of the phase transition and the trilinear coupling of the Higgs to two singlet-like scalars, and hence between the phase transition and non-resonant scalar pair production involving the singlet at colliders. We study the prospects for observing these processes at the LHC and a future 100 TeV pp collider, focusing particularly on double singlet production. We also discuss correlationsmore » between the strength of the electroweak phase transition and other observables at hadron and future lepton colliders. Searches for non-resonant singlet-like scalar pair production at 100 TeV would provide a sensitive probe of the electroweak phase transition in this model, complementing resonant di-Higgs searches and precision measurements. Our study illustrates a strategy for systematically exploring the phenomenologically viable parameter space of this model, which we hope will be useful for future work.« less
  • It is widely believed that the existence of singlet scalars in some standard model extensions can easily make the electroweak phase transition strongly first order, which is needed for the electroweak baryogenesis scenario. In this paper, we will examine the strength of the electroweak phase transition in the simplest extension of the standard model with a real singlet using the sphaleron energy at the critical temperature. We find that the phase transition is stronger by adding a singlet; and also that the criterion for a strong phase transition {omega}(T{sub c})/T{sub c} > or approx. 1, where {omega}=({upsilon}{sup 2}+(x-x{sub 0}){sup 2}){supmore » 1/2} and x (x{sub 0}) is the singlet vev in the broken (symmetric) phase, is not valid for models containing singlets, even though often used in the literature. The usual condition {upsilon}{sub c}/T{sub c} > or approx. 1 is more meaningful, and it is satisfied for a large part of the parameter space for physically allowed Higgs masses.« less
  • Cited by 17