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Title: Electroweak sphaleron with dimension-six operators

Abstract

New physics at the TeV scale can affect the dynamics of the electroweak phase transition in many ways. In this paper, we evaluate its impact on the rate of baryon-number violation via sphaleron transitions. We parameterize the effect of new physics with dimension-6 operators, and we use the Newton-Kantorovich method to numerically solve the resulting equations of motion. Depending on the sign of the coefficient of the dimension-6 operators, their presence can either increase or decrease the sphaleron energy at the level of a few percent, parametrically of order m$$2\atop{W}$$/Λ2 where Λ is the scale suppressing the dimension-6 operator. Lastly, the baryon-number washout condition, typically written as vc/Tc>1, is directly proportional to the sphaleron energy, and we discuss how the presence of dimension-6 operators can affect electroweak baryogenesis.

Authors:
 [1];  [2];  [3]
  1. Univ. of Chicago, IL (United States). Enrico Fermi Inst.
  2. Univ. of Chicago, IL (United States). Kavli Inst. for Cosmological Physics
  3. Univ. of Chicago, IL (United States). Enrico Fermi Inst. and Kavli Inst. for Cosmological Physics
Publication Date:
Research Org.:
Univ. of Chicago, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP); National Science Foundation (NSF)
OSTI Identifier:
1595706
Alternate Identifier(s):
OSTI ID: 1414513
Grant/Contract Number:  
SC0009924; SC0013642; PHY-1125897
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review D
Additional Journal Information:
Journal Volume: 96; Journal Issue: 11; Journal ID: ISSN 2470-0010
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; Baryogenesis & leptogenesis; Effective field theory; Nonperturbative effects in field theory

Citation Formats

Gan, Xucheng, Long, Andrew J., and Wang, Lian-Tao. Electroweak sphaleron with dimension-six operators. United States: N. p., 2017. Web. doi:10.1103/PhysRevD.96.115018.
Gan, Xucheng, Long, Andrew J., & Wang, Lian-Tao. Electroweak sphaleron with dimension-six operators. United States. doi:10.1103/PhysRevD.96.115018.
Gan, Xucheng, Long, Andrew J., and Wang, Lian-Tao. Thu . "Electroweak sphaleron with dimension-six operators". United States. doi:10.1103/PhysRevD.96.115018. https://www.osti.gov/servlets/purl/1595706.
@article{osti_1595706,
title = {Electroweak sphaleron with dimension-six operators},
author = {Gan, Xucheng and Long, Andrew J. and Wang, Lian-Tao},
abstractNote = {New physics at the TeV scale can affect the dynamics of the electroweak phase transition in many ways. In this paper, we evaluate its impact on the rate of baryon-number violation via sphaleron transitions. We parameterize the effect of new physics with dimension-6 operators, and we use the Newton-Kantorovich method to numerically solve the resulting equations of motion. Depending on the sign of the coefficient of the dimension-6 operators, their presence can either increase or decrease the sphaleron energy at the level of a few percent, parametrically of order m$2\atop{W}$/Λ2 where Λ is the scale suppressing the dimension-6 operator. Lastly, the baryon-number washout condition, typically written as vc/Tc>1, is directly proportional to the sphaleron energy, and we discuss how the presence of dimension-6 operators can affect electroweak baryogenesis.},
doi = {10.1103/PhysRevD.96.115018},
journal = {Physical Review D},
number = 11,
volume = 96,
place = {United States},
year = {2017},
month = {12}
}

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    Works referencing / citing this record:

    Probing baryogenesis through the Higgs boson self-coupling
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