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S3 flavored left-right symmetric model of quarks

Das, Dipankar LU and Pal, Palash B. (2018) In Physical Review D 98(11).
Abstract

We construct a model based on the electroweak gauge group SU(2)L×SU(2)R×U(1)B-L augmented by an S3 symmetry. We assign nontrivial S3 transformation properties to the quarks, and consequently we need two scalar bidoublets. Despite the extra bidoublet, we have only six Yukawa couplings thanks to the discrete symmetry. Diagonalization of the quark mass matrices shows that at the leading order only the first two generations mix, resulting in a block diagonal CKM matrix, and the first generation quarks are massless. Inclusion of subleading terms produces an acceptable CKM matrix up to corrections of O(λ4). As for the first generation quark masses, we obtain a satisfactory value for mu/md. The masses themselves, though in the same ballpark,... (More)

We construct a model based on the electroweak gauge group SU(2)L×SU(2)R×U(1)B-L augmented by an S3 symmetry. We assign nontrivial S3 transformation properties to the quarks, and consequently we need two scalar bidoublets. Despite the extra bidoublet, we have only six Yukawa couplings thanks to the discrete symmetry. Diagonalization of the quark mass matrices shows that at the leading order only the first two generations mix, resulting in a block diagonal CKM matrix, and the first generation quarks are massless. Inclusion of subleading terms produces an acceptable CKM matrix up to corrections of O(λ4). As for the first generation quark masses, we obtain a satisfactory value for mu/md. The masses themselves, though in the same ballpark, turn out to be somewhat smaller than the accepted range.

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Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review D
volume
98
issue
11
article number
115001
publisher
American Physical Society
external identifiers
  • scopus:85059454299
ISSN
2470-0010
DOI
10.1103/PhysRevD.98.115001
language
English
LU publication?
yes
id
0cbe3117-d185-47b3-874f-3cf522c55609
date added to LUP
2019-05-22 15:18:03
date last changed
2020-01-16 03:56:11
@article{0cbe3117-d185-47b3-874f-3cf522c55609,
  abstract     = {<p>We construct a model based on the electroweak gauge group SU(2)L×SU(2)R×U(1)B-L augmented by an S3 symmetry. We assign nontrivial S3 transformation properties to the quarks, and consequently we need two scalar bidoublets. Despite the extra bidoublet, we have only six Yukawa couplings thanks to the discrete symmetry. Diagonalization of the quark mass matrices shows that at the leading order only the first two generations mix, resulting in a block diagonal CKM matrix, and the first generation quarks are massless. Inclusion of subleading terms produces an acceptable CKM matrix up to corrections of O(λ4). As for the first generation quark masses, we obtain a satisfactory value for mu/md. The masses themselves, though in the same ballpark, turn out to be somewhat smaller than the accepted range.</p>},
  author       = {Das, Dipankar and Pal, Palash B.},
  issn         = {2470-0010},
  language     = {eng},
  month        = {12},
  number       = {11},
  publisher    = {American Physical Society},
  series       = {Physical Review D},
  title        = {S3 flavored left-right symmetric model of quarks},
  url          = {http://dx.doi.org/10.1103/PhysRevD.98.115001},
  doi          = {10.1103/PhysRevD.98.115001},
  volume       = {98},
  year         = {2018},
}