Gravitational wave signals from leptoquark-induced first-order electroweak phase transitions
Gravitational wave signals from leptoquark-induced first-order electroweak phase transitions
We consider the extension of the Standard Model (SM) with scalar leptoquarks in SU(2) singlet, doublet and triplet representations. Through the coupling between leptoquark and the SM Higgs field, the electroweak phase transition (EWPT) can turn into first-order and consequently produce gravitational wave signals. We compute the required value of the leptoquark-Higgs for first-order EWPT to happen and discuss about the possible constraint from Higgs phenomenology. Choosing some benchmarks, we present the strength of the gravitational waves produced during the leptoquark-induced first-order EWPT and compare them to detector sensitivities. We find that the SU(2) representations of the leptoquark can be distinguished by gravitational waves in the parameter space where first-order EWPT can happen as a function of the Higgs portal coupling.
cosmology of theories beyond the SM, particle physics - cosmology connection
Fu, Bowen
71c18b27-d30a-4e33-806b-e45ea5446e46
King, Stephen F.
f8c616b7-0336-4046-a943-700af83a1538
Fu, Bowen
71c18b27-d30a-4e33-806b-e45ea5446e46
King, Stephen F.
f8c616b7-0336-4046-a943-700af83a1538
Fu, Bowen and King, Stephen F.
(2023)
Gravitational wave signals from leptoquark-induced first-order electroweak phase transitions.
JCAP, 2023 (5), [055].
(doi:10.1088/1475-7516/2023/05/055).
Abstract
We consider the extension of the Standard Model (SM) with scalar leptoquarks in SU(2) singlet, doublet and triplet representations. Through the coupling between leptoquark and the SM Higgs field, the electroweak phase transition (EWPT) can turn into first-order and consequently produce gravitational wave signals. We compute the required value of the leptoquark-Higgs for first-order EWPT to happen and discuss about the possible constraint from Higgs phenomenology. Choosing some benchmarks, we present the strength of the gravitational waves produced during the leptoquark-induced first-order EWPT and compare them to detector sensitivities. We find that the SU(2) representations of the leptoquark can be distinguished by gravitational waves in the parameter space where first-order EWPT can happen as a function of the Higgs portal coupling.
Text
Fu_2023_J._Cosmol._Astropart._Phys._2023_055
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e-pub ahead of print date: 26 May 2023
Keywords:
cosmology of theories beyond the SM, particle physics - cosmology connection
Identifiers
Local EPrints ID: 477717
URI: http://eprints.soton.ac.uk/id/eprint/477717
ISSN: 1475-7516
PURE UUID: 147921c8-5212-4772-9839-e09b149fb1eb
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Date deposited: 13 Jun 2023 17:15
Last modified: 17 Mar 2024 02:39
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