Higgs flavor violation as a signal to discriminate models

Author(s)

de Lima, L. ; Machado, C. S. ; Matheus, R. D. ; do Prado, L. A. F.

• Document type: Journal article
• Source: Journal of High Energy Physics; v. N/A, n. 11, p. 23-pg., 2015-11-12.

Abstract

We consider the Higgs Lepton Flavor Violating process h -> tau mu, in which CMS found a 2.5 sigma excess of events, from a model independent perspective, and find that it is difficult to generate this operator without also obtaining a sizeable Wilson coefficient for the dipole operators responsible for tau radiative decay, constrained by BABAR to BR(tau -> mu gamma) < 4.4 x 10(-8). We then survey a set of representative models for new physics, to determine which ones are capable of evading this problem. We conclude that, should this measurement persist as a signal, type-III Two Higgs Doublet Models and Higgs portal-like models are favored, while SUSY and Composite Higgs models are unlikely to explain it. (AU)

• FAPESP's process: 12/21627-9 - The leptonic sector in Quiver Gauge Theories: theory and phenomenology
• Grantee: Camila Sampaio Machado
• Support Opportunities: Scholarships in Brazil - Doctorate
• FAPESP's process: 13/03862-3 - Effective theories and lepton flavor violation in Higgs decays
• Grantee: Leônidas Augusto Fernandes Do Prado
• Support Opportunities: Scholarships in Brazil - Master
• FAPESP's process: 12/21436-9 - Hierarchical quiver Gauge theories: model building and phenomenology
• Grantee: Leonardo de Lima
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• FAPESP's process: 13/01907-0 - São Paulo Research and Analysis Center
• Grantee: Sergio Ferraz Novaes
• Support Opportunities: Research Projects - Thematic Grants