Two-loop contributions of flavor-changing neutral Higgs bosons to [mu][r arrow][ital e][gamma]

Journal Article · Thu Jul 01 04:00:00 EDT 1993 · Physical Review, D (Particles Fields); (United States)

DOI:https://doi.org/10.1103/PhysRevD.48.217· OSTI ID:6521764

Chang, D ^[1]; Hou, W S ^[2]; Keung, W ^[3]

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1. Department of Physics and Astronomy, Northwestern University, Evanston, Illinois 60208 (United States)
2. Department of Physics, National Taiwan University, Taipei, Taiwan 10764 (Taiwan, Province of China)
3. Theory Division, CERN, CH-1211, Geneva 23 (Switzerland) Physics Department, University of Illinois at Chicago, Chicago, Illinois 60680 (United States)

The two-loop mechanism of Bjorken and Weinberg is used to constrain flavor-changing neutral Higgs bosons. We calculate the complete set of two-loop diagrams for the rare decay [mu][r arrow][ital e]+[gamma] induced by such neutral Higgs bosons, for arbitrary Higgs boson and top quark masses. The analytic result is used to set limits on Higgs boson masses for some recent models with a specific ansatz about the flavor-changing couplings. For example, in the Cheng-Sher scenario of multi-Higgs-doublet models, all neutral Higgs bosons possess flavor-changing ([ital f][sub [ital i]][leftrightarrow][ital f][sub [ital j]]) couplings proportional to [radical][ital m][sub [ital i]m[ital j]] . We find that the present limit on [mu][r arrow][ital e][gamma] implies that, in such a scheme, these neutral Higgs bosons should be heavier than 200 GeV.

• OSTI ID: 6521764
• Journal Information: Physical Review, D (Particles Fields); (United States), Journal Name: Physical Review, D (Particles Fields); (United States) Vol. 48:1; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

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72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ALGEBRAIC CURRENTS
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CURRENTS
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FLAVOR MODEL
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LEPTON NUMBER
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WEAK NEUTRAL CURRENTS