Lepton flavor violation with light vector bosons
New sub-GeV vector bosons with couplings to muons but not electrons have been discussed in order to explain the muon's magnetic moment, the gap of high-energy neutrinos in IceCube or the proton radius puzzle. If such a light Z′ not only violates lepton universality but also lepton flavor, as ex...
| Main Author: | |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2016-07-01
|
| Series: | Physics Letters B |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S037026931630154X |
| Summary: | New sub-GeV vector bosons with couplings to muons but not electrons have been discussed in order to explain the muon's magnetic moment, the gap of high-energy neutrinos in IceCube or the proton radius puzzle. If such a light Z′ not only violates lepton universality but also lepton flavor, as expected for example from the recent hint for h→μτ at CMS, the two-body decay mode τ→μZ′ opens up and for MZ′<2mμ gives better constraints than τ→3μ already with 20-year-old ARGUS limits. We discuss the general prospects and motivation of light vector bosons with lepton-flavor-violating couplings. |
|---|---|
| ISSN: | 0370-2693 1873-2445 |