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Title: Neutrino Mass Generation at TeV Scale and New Physics Signatures from Charged Higgs at the LHC for Photon Initiated Processes

We consider the collider phenomenology of a simple extension of the Standard Model (SM), which consists of an EW isospin $3/2$ scalar, $$\Delta$$ and a pair of EW isospin $1$ vector like fermions, $$\Sigma$$ and $$\bar{\Sigma}$$, responsible for generating tiny neutrino mass via the effective dimension seven operator. This scalar quadruplet with hypercharge Y = 3 has a plethora of implications at the collider experiments. Its signatures at TeV scale colliders are expected to be seen, if the quadruplet masses are not too far above the electroweak symmetry breaking scale. In this article, we study the phenomenology of multi-charged quadruplet scalars. In particular, we study the multi-lepton signatures at the Large Hadron Collider (LHC) experiment, arising from the production and decays of triply and doubly charged scalars. We studied Drell-Yan (DY) pair production as well as pair production of the charged scalars via photon-photon fusion. For doubly and triply charged scalars, photon fusion contributes significantly for large scalar masses. We also studied LHC constraints on the masses of doubly charged scalars in this model. We derive a lower mass limit of 725 GeV on doubly charged quadruplet scalar.
 [1] ;  [2] ;  [1] ;  [3] ;  [4] ;  [5]
  1. Institute of Physics, Sachivalaya Marg, Bhubaneswar (India)
  2. (India)
  3. (FNAL), Batavia, IL (United States). Theoretical Physics Department
  4. (United States). Department of Physics and Oklahoma Center for High Energy Physics
  5. Oklahoma Ctr. High Energy Phys.
Publication Date:
Report Number(s):
OSU-HEP-17-02; IP-BBSR-2017-8; FERMILAB-PUB-17-424-CD; arXiv:1705.01121
Journal ID: ISSN 1029-8479; 1598035
Grant/Contract Number:
AC02-07CH11359; SC0016013
Accepted Manuscript
Journal Name:
Journal of High Energy Physics (Online)
Additional Journal Information:
Journal Name: Journal of High Energy Physics (Online); Journal Volume: 2018; Journal ID: ISSN 1029-8479
Springer Berlin
Research Org:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Country of Publication:
United States
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; Beyond Standard Model; Higgs Physics; Neutrino Physics
OSTI Identifier: