NonStandard Interactions in Radiative Neutrino Mass Models
Abstract
Models of radiative Majorana neutrino masses require new scalars and/or fermions to induce lepton number violating interactions. We show that these new particles also generate observable neutrino nonstandard interactions (NSI) with matter. We classify radiative models as typeI or II, with typeI models containing at least one Standard Model (SM) particle inside the loop diagram generating neutrino mass, and typeII models having no SM particle inside the loop. While typeII radiative models do not generate NSI at treelevel, popular models which fall under the typeI category are shown, somewhat surprisingly, to generate observable NSI at treelevel, while being consistent with direct and indirect constraints from colliders, electroweak precision data and charged lepton flavor violation (cLFV). We survey such models where neutrino masses arise at one, two and three loops. In the prototypical Zee model which generates neutrino masses via oneloop diagrams involving charged scalars, we find that diagonal NSI can be as large as ($$8\%, 3.8\%, 43\%$$) for ($$\varepsilon_{ee},\varepsilon_{\mu \mu}, \varepsilon_{\tau \tau}$$), while offdiagonal NSI can be at most ($$1.5 \times 10^{3}\%, 0.56\%, 0.34\%$$) for ($$\varepsilon_{e\mu},\varepsilon_{e \tau}, \varepsilon_{\mu \tau}$$). In radiative neutrino mass models using leptoquarks (LQs), $$(\varepsilon_{\mu\mu},\, \varepsilon_{\tau\tau})$$ can be as large as $$(21.6\%,\,51.7\%)$$, while $$\varepsilon_{ee}$$ and $$(\varepsilon_{e\mu},\, \varepsilon_{e\tau},\,\varepsilon_{\mu\tau})$$ can at most be 0.6\%. The most stringent constraints on the diagonal NSI are found to come from neutrino oscillation and scattering experiments, while the offdiagonal NSI are mostly constrained by lowenergy processes, such as atomic parity violation and cLFV. We also comment on the future sensitivity of these models in longbaseline experiments, such as DUNE.
 Authors:

 Oklahoma State U.
 Fermilab
 Publication Date:
 Research Org.:
 Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
 Sponsoring Org.:
 USDOE Office of Science (SC), High Energy Physics (HEP) (SC25)
 OSTI Identifier:
 1556969
 Report Number(s):
 arXiv:1907.09498; FERMILABPUB19304T; OSUHEP1904
1745937
 DOE Contract Number:
 AC0207CH11359
 Resource Type:
 Journal Article
 Journal Name:
 TBD
 Additional Journal Information:
 Journal Name: TBD
 Country of Publication:
 United States
 Language:
 English
 Subject:
 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
Citation Formats
Babu, K. S., Dev, P.S. Bhupal, Jana, Sudip, and Thapa, Anil. NonStandard Interactions in Radiative Neutrino Mass Models. United States: N. p., 2019.
Web.
Babu, K. S., Dev, P.S. Bhupal, Jana, Sudip, & Thapa, Anil. NonStandard Interactions in Radiative Neutrino Mass Models. United States.
Babu, K. S., Dev, P.S. Bhupal, Jana, Sudip, and Thapa, Anil. Mon .
"NonStandard Interactions in Radiative Neutrino Mass Models". United States. https://www.osti.gov/servlets/purl/1556969.
@article{osti_1556969,
title = {NonStandard Interactions in Radiative Neutrino Mass Models},
author = {Babu, K. S. and Dev, P.S. Bhupal and Jana, Sudip and Thapa, Anil},
abstractNote = {Models of radiative Majorana neutrino masses require new scalars and/or fermions to induce lepton number violating interactions. We show that these new particles also generate observable neutrino nonstandard interactions (NSI) with matter. We classify radiative models as typeI or II, with typeI models containing at least one Standard Model (SM) particle inside the loop diagram generating neutrino mass, and typeII models having no SM particle inside the loop. While typeII radiative models do not generate NSI at treelevel, popular models which fall under the typeI category are shown, somewhat surprisingly, to generate observable NSI at treelevel, while being consistent with direct and indirect constraints from colliders, electroweak precision data and charged lepton flavor violation (cLFV). We survey such models where neutrino masses arise at one, two and three loops. In the prototypical Zee model which generates neutrino masses via oneloop diagrams involving charged scalars, we find that diagonal NSI can be as large as ($8\%, 3.8\%, 43\%$) for ($\varepsilon_{ee},\varepsilon_{\mu \mu}, \varepsilon_{\tau \tau}$), while offdiagonal NSI can be at most ($1.5 \times 10^{3}\%, 0.56\%, 0.34\%$) for ($\varepsilon_{e\mu},\varepsilon_{e \tau}, \varepsilon_{\mu \tau}$). In radiative neutrino mass models using leptoquarks (LQs), $(\varepsilon_{\mu\mu},\, \varepsilon_{\tau\tau})$ can be as large as $(21.6\%,\,51.7\%)$, while $\varepsilon_{ee}$ and $(\varepsilon_{e\mu},\, \varepsilon_{e\tau},\,\varepsilon_{\mu\tau})$ can at most be 0.6\%. The most stringent constraints on the diagonal NSI are found to come from neutrino oscillation and scattering experiments, while the offdiagonal NSI are mostly constrained by lowenergy processes, such as atomic parity violation and cLFV. We also comment on the future sensitivity of these models in longbaseline experiments, such as DUNE.},
doi = {},
journal = {TBD},
number = ,
volume = ,
place = {United States},
year = {2019},
month = {7}
}