# Sphalerons and the electroweak phase transition in models with higher scalar representations

Ahriche A, Chowdhury TA, Nasri S (2014)
Journal of High Energy Physics 2014(11): 096.

572.60 KB
Journal Article | Original Article | Published | English
Author
; ;
Department
Abstract
In this work we investigate the sphaleron solution in a SU(2) x U(1)(X) gauge theory, which also encompasses the Standard Model, with higher scalar representation(s) (J((i)), X-(i)). We show that the field profiles describing the sphaleron in higher scalar multiplet, have similar trends like the doublet case with respect to the radial distance. We compute the sphaleron energy and find that it scales linearly with the vacuum expectation value of the scalar field and its slope depends on the representation. We also investigate the effect of U(1) gauge field and find that it is small for the physical value of the mixing angle, theta W and resembles the case for the doublet. For higher representations, we show that the criterion for strong first order phase transition, v(c)/T-c > eta, is relaxed with respect to the doublet case, i.e. eta < 1.
Keywords
Publishing Year
ISSN
Financial disclosure
Open Access publishing charge funded by SCOAP$^3$ – Sponsoring Consortium for Open Access Publishing in Particle Physics and Bielefeld University.
PUB-ID

### Cite this

Ahriche A, Chowdhury TA, Nasri S. Sphalerons and the electroweak phase transition in models with higher scalar representations. Journal of High Energy Physics. 2014;2014(11):096.
Ahriche, A., Chowdhury, T. A., & Nasri, S. (2014). Sphalerons and the electroweak phase transition in models with higher scalar representations. Journal of High Energy Physics, 2014(11), 096. doi:10.1007/jhep11(2014)096
Ahriche, A., Chowdhury, T. A., and Nasri, S. (2014). Sphalerons and the electroweak phase transition in models with higher scalar representations. Journal of High Energy Physics 2014, 096.
Ahriche, A., Chowdhury, T.A., & Nasri, S., 2014. Sphalerons and the electroweak phase transition in models with higher scalar representations. Journal of High Energy Physics, 2014(11), p 096.
A. Ahriche, T.A. Chowdhury, and S. Nasri, “Sphalerons and the electroweak phase transition in models with higher scalar representations”, Journal of High Energy Physics, vol. 2014, 2014, pp. 096.
Ahriche, A., Chowdhury, T.A., Nasri, S.: Sphalerons and the electroweak phase transition in models with higher scalar representations. Journal of High Energy Physics. 2014, 096 (2014).
Ahriche, Amine, Chowdhury, Talal Ahmed, and Nasri, Salah. “Sphalerons and the electroweak phase transition in models with higher scalar representations”. Journal of High Energy Physics 2014.11 (2014): 096.
All files available under the following license(s):
This Item is protected by copyright and/or related rights. [...]
Main File(s)
File Name
Access Level
Open Access
2017-04-24T12:16:12Z

This data publication is cited in the following publications:
This publication cites the following data publications:

### Export

0 Marked Publications

Open Data PUB

### Web of Science

View record in Web of Science®

arXiv 1409.4086

Inspire 1316519

SCOAP3 4883