Leptonic scalars and collider signatures in a UV-complete model

Author(s)

Dev, P. S. Bhupal ; Dutta, Bhaskar ; Ghosh, Tathagata ; Han, Tao ; Qin, Han ; Zhang, Yongchao

• Document type: Journal article
• Source: Journal of High Energy Physics; v. N/A, n. 3, p. 47-pg., 2022-03-10.

Abstract

We study the non-standard interactions of neutrinos with light leptonic scalars (phi) in a global (B - L)-conserved ultraviolet (UV)-complete model. The model utilizes Type-II seesaw motivated neutrino interactions with an SU(2)(L)-triplet scalar, along with an additional singlet in the scalar sector. This UV-completion leads to an enriched spectrum and consequently new observable signatures. We examine the low-energy lepton flavor violation constraints, as well as the perturbativity and unitarity constraints on the model parameters. Then we lay out a search strategy for the unique signature of the model resulting from the leptonic scalars at the hadron colliders via the processes H-+/-+/- -> (WW +/-)-W-+/-phi and H-+/- -> W-+/-phi for both small and large leptonic Yukawa coupling cases. We find that via these associated production processes at the HL-LHC, the prospects of doubly-charged scalar H(+/-+/- )can reach up to 800 (500) GeV and 1.1 (0.8) TeV at the 2 sigma (5 sigma) significance for small and large Yukawa couplings, respectively. A future 100 TeV hadron collider will further increase the mass reaches up to 3.8 (2.6) TeV and 4 (2.7) TeV, at the 2a (5a) significance, respectively. We also demonstrate that the mass of phi can be determined at about 10% accuracy at the LHC for the large Yukawa coupling case even though it escapes as missing energy from the detectors. (AU)

• FAPESP's process: 19/17182-0 - Particle Physics Phenomenology
• Grantee: Tathagata Ghosh
• Support Opportunities: Scholarships in Brazil - Post-Doctoral