S3 flavored left-right symmetric model of quarks

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S3 flavored left-right symmetric model of quarks. / Das, Dipankar; Pal, Palash B.

I: Physical Review D, Vol. 98, Nr. 11, 115001, 01.12.2018.

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TY - JOUR

T1 - S3 flavored left-right symmetric model of quarks

AU - Das, Dipankar

AU - Pal, Palash B.

PY - 2018/12/1

Y1 - 2018/12/1

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=85059454299&partnerID=8YFLogxK

U2 - 10.1103/PhysRevD.98.115001

DO - 10.1103/PhysRevD.98.115001

M3 - Article

VL - 98

JO - Physical Review D - Particles, Fields, Gravitation and Cosmology

T2 - Physical Review D - Particles, Fields, Gravitation and Cosmology

JF - Physical Review D - Particles, Fields, Gravitation and Cosmology

SN - 1550-2368

IS - 11

M1 - 115001

ER -