Speaker
Description
We study the strong first-order phase transition (SFOPT) associated with $SU(2)_R\times U(1)_{B-L}$-breaking in the doublet left-right symmetric model (DLRSM), and the resulting stochastic gravitational wave (GW) background. For different values of the symmetry-breaking scale $v_R =20,~30$, and $50$ TeV, we construct the one-loop finite temperature effective potential to explore the parameter space for SFOPT. We identify the region where the associated GW signature is detectable at planned GW observatories. A strong GW background favors a relatively light CP-even neutral scalar $H_{3}$, arising from the $SU(2)_R$ doublet. The $SU(2)_L$ subgroup of DLRSM is broken by three $vevs$: $\kappa_1,~\kappa_2$, and $v_L$. We observe a preference for $\mathcal{O}(1)$ values of the ratio $w=v_L/\kappa_1$, but no clear preference for the ratio $r=\kappa_2/\kappa_1$. A large number of points with strong GW signal can be ruled out from precise measurement of the trilinear Higgs coupling and searches for $H_3$ at future colliders.
| Reference publication/preprint | 2309.12023 |
|---|---|
| Designation | Student |
| Institution | Indian Institute of Technology Indore |
