Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1997-10-17
Phys.Lett. B421 (1998) 250-258
Physics
High Energy Physics
High Energy Physics - Phenomenology
A few references added, to appear in PLB
Scientific paper
10.1016/S0370-2693(98)00020-3
Using an effective lagrangian description we analyze possible new physics contributions to the most relevant muon number violating processes: $\mu \to e \gamma$ and $\mu$--$e$ conversion in nuclei. We identify a general class of models in which those processes are generated at one loop level and in which $\mu$--$e$ conversion is enhanced with respect to $\mu \to e \gamma$ by a large $\ln(m^2_\mu/\Lambda^2),$ where $\Lambda$ is the scale responsible for the new physics. For this wide class of models bounds on $\mu$--$e$ conversion constrain the scale of new physics more stringently than $\mu \to e \gamma$ already at present and, with the expected improvements in $\mu$--$e$ conversion experiments, will push it upwards by about one order of magnitude more. To illustrate this general result we give an explicit model containing a doubly charged scalar and derive new bounds on its couplings to the leptons.
Raidal Martti
Santamaria Arcadi
No associations
LandOfFree
μ-e conversion in nuclei versus μ-->e γ: an effective field theory point of view does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with μ-e conversion in nuclei versus μ-->e γ: an effective field theory point of view, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and μ-e conversion in nuclei versus μ-->e γ: an effective field theory point of view will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-83943