Exotic Higgs boson decays and the electroweak phase transition

Jonathan Kozaczuk (Department of Physics, University of California, San Diego, La Jolla, California 92093, USA; Department of Physics, University of Illinois, Urbana, Illinois 61801, USA; Amherst Center for Fundamental Interactions, Department of Physics, University of Massachusetts, Amherst, Massachusetts 01003, USA) ; Michael J. Ramsey-Musolf (Tsung-Dao Lee Institute and School of Physics and Astronomy, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240 China; Amherst Center for Fundamental Interactions, Department of Physics, University of Massachusetts, Amherst, Massachusetts 01003, USA; Kellogg Radiation Laboratory, California Institute of Technology, Pasadena, California 91125, USA) ; Jessie Shelton (Department of Physics, University of Illinois, Urbana, Illinois 61801, USA)

Light new physics weakly coupled to the Higgs can induce a strong first-order electroweak phase transition (EWPT). Here, we argue that scenarios in which the EWPT is driven first-order by a light scalar with mass between 10 GeVmh/2 and small mixing with the Higgs will be conclusively probed by the high-luminosity LHC and future Higgs factories. Our arguments are based on analytic and numerical studies of the finite-temperature effective potential and provide a well-motivated target for exotic Higgs decay searches at the LHC and future lepton colliders.

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      "value": "Light new physics weakly coupled to the Higgs can induce a strong first-order electroweak phase transition (EWPT). Here, we argue that scenarios in which the EWPT is driven first-order by a light scalar with mass between <math><mrow><mo>\u223c</mo><mn>10</mn><mtext> </mtext><mtext> </mtext><mi>GeV</mi><mo>\u2212</mo><msub><mrow><mi>m</mi></mrow><mrow><mi>h</mi></mrow></msub><mo>/</mo><mn>2</mn></mrow></math> and small mixing with the Higgs will be conclusively probed by the high-luminosity LHC and future Higgs factories. Our arguments are based on analytic and numerical studies of the finite-temperature effective potential and provide a well-motivated target for exotic Higgs decay searches at the LHC and future lepton colliders."
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Published on:
25 June 2020
Publisher:
APS
Published in:
Physical Review D , Volume 101 (2020)
Issue 11
DOI:
https://doi.org/10.1103/PhysRevD.101.115035
arXiv:
1911.10210
Copyrights:
Published by the American Physical Society
Licence:
CC-BY-4.0

Fulltext files: