TY  - JOUR
AU  - Bernard, V.
AU  - Descotes-Genon, S.
AU  - Vale Silva, L.
PY  - 2020
DA  - 2020//
TI  - Constraining the gauge and scalar sectors of the doublet left-right symmetric model
T2  - J. High Energy Phys.
JO  - Journal of High Energy Physics
SP  - 088
EP  - 64pp
VL  - 09
IS  - 9
PB  - Springer
KW  - Beyond Standard Model
KW  - GUT
AB  - We consider a left-right symmetric extension of the Standard Model where the spontaneous breakdown of the left-right symmetry is triggered by doublets. The electroweak rho parameter is protected from large corrections in this Doublet Left-Right Model (DLRM), contrary to the triplet case. This allows in principle for more diverse patterns of symmetry breaking. We consider several constraints on the gauge and scalar sectors of DLRM: the unitarity of scattering processes involving gauge bosons with longitudinal polarisations, the radiative corrections to the muon Delta r parameter and the electroweak precision observables measured at the Z pole and at low energies. Combining these constraints within the frequentist CKMfitter approach, we see that the fit pushes the scale of left-right symmetry breaking up to a few TeV, while favouring an electroweak symmetry breaking triggered not only by the SU (2)(L) x SU (2)(R) bi-doublet, which is the case most commonly considered in the literature, but also by the SU (2)(L) doublet.
SN  - 1029-8479
UR  - https://arxiv.org/abs/2001.00886
UR  - https://doi.org/10.1007/JHEP09(2020)088
DO  - 10.1007/JHEP09(2020)088
LA  - English
N1  - WOS:000569357600001
ID  - Bernard_etal2020
ER  -