Bounds on neutrino-scalar Yukawa coupling

Author(s)

Pasquini, P. S. ; Peres, O. L. G.

• Document type: Journal article
• Source: PHYSICAL REVIEW D; v. 93, n. 5, p. 8-pg., 2016-03-09.

Abstract

General neutrino-scalar couplings appear in many extensions of the Standard Model. We can probe these neutrino-scalar couplings by a leptonic decay of mesons and from a heavy neutrino search. Our analysis improves the present limits to vertical bar g(e)vertical bar(2) < 1.9 x 10(-6) and vertical bar g(mu)vertical bar(2) < 1.9 x 10(-7) at 90% C.L. for massless scalars. For massive scalars, we found for the first time the constraints for g(alpha)(2) couplings to be 10(-6) - 10(-1), respectively, for scalar masses between up 100 MeV, and we have no limits for masses above 300 MeV. (AU)

• FAPESP's process: 12/16389-1 - Neutrino phenomenology
• Grantee: Orlando Luis Goulart Peres
• Support Opportunities: Regular Research Grants
• FAPESP's process: 14/05133-1 - Flavor physics
• Grantee: Pedro Simoni Pasquini
• Support Opportunities: Scholarships in Brazil - Doctorate
• FAPESP's process: 15/16809-9 - Study of Neutrino Parameters and their Consequences
• Grantee: Pedro Simoni Pasquini
• Support Opportunities: Scholarships abroad - Research Internship - Doctorate