English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Zendy Open

Presents the pdf analysis as premium feature

PDF Analysis

Insights

Presents the summarisation as premium feature

Summarisation

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the zaia usage as premium feature

ZAIA

Zendy Tools

Zendy Plus

Presents the access of premium content as premium feature

Premium Content

We investigate unification prospects of two heavy scalar triplet extension ofthe standard model where, in the absence of any right-handed neutrino (RHN),type-II seesaw accounts for current oscillation data with hierarchical neutrinomasses consistent with cosmological bounds and the lighter triplet decayexplains baryon asymmetry of the Universe via leptogenesis. We note that theabsence of RHNs in the fundamental fermion representations of SU(5) delineatesits outstanding position compared to SO(10) (or $E_6$). In addition, SU(5)needs smaller scalar representations ${15}_{H1}\oplus {15}_{H2}$ compared tomuch larger representations ${126}_{H1}\oplus {126}_{H2} \subset $ SO(10) (or${351}^{\prime}_{H1}\oplus {351}^{\prime}_{H2} \subset E_6$). We show howprecision gauge coupling unification is achieved through SU(5) with thepredictions of different sets of two heavy triplet masses which, besides beingcompatible with type-II seesaw, are also consistent with unflavoured or $\tau-$ flavoured leptogenesis. In addition to an intermediate mass colour octetfermion, completion of precision gauge coupling unification is found to requireessentially the presence of the well known weak triplet fermion $\Sigma(3,0,1)$ in its mass range $M_{\Sigma}\simeq {\cal O}(500-3000)$ GeV out ofwhich the dominant dark matter (DM) resonance mass $M_{\Sigma}\ge 2.4$ TeV isknown to account for the observed cosmological relic density. The deficiency inrelic density for lighter $\Sigma$ solutions is compensated by an additionalscalar singlet DM. A GUT ansatz is noted to ensure vacuum stability of the SMscalar potential for all types of unification solutions realised in this work.We discuss proton lifetime estimations for $p\to e^+\pi^0$ compatible with thepresent Hyper-Kamiokande bound as a function of an unknown mixing parameter inthe model.

SU(5) unification of two triplet seesaw and leptogenesis with dark matter and vacuum stability