Lepton flavor violation with displaced vertices
If light new physics with lepton-flavor-violating couplings exists, the prime discovery channel might not be ℓ→ℓ′γ but rather ℓ→ℓ′X, where the new boson X could be an axion, majoron, familon or Z′ gauge boson. The most conservative bound then comes from ℓ→ℓ′+inv, but if the on-shell X can decay back...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2018-01-01
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| Series: | Physics Letters B |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0370269317309590 |
| _version_ | 1811205328627302400 |
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| author | Julian Heeck Werner Rodejohann |
| author_facet | Julian Heeck Werner Rodejohann |
| author_sort | Julian Heeck |
| collection | DOAJ |
| description | If light new physics with lepton-flavor-violating couplings exists, the prime discovery channel might not be ℓ→ℓ′γ but rather ℓ→ℓ′X, where the new boson X could be an axion, majoron, familon or Z′ gauge boson. The most conservative bound then comes from ℓ→ℓ′+inv, but if the on-shell X can decay back into leptons or photons, displaced-vertex searches could give much better limits. We show that only a narrow region in parameter space allows for displaced vertices in muon decays, μ→eX,X→γγ,ee, whereas tauon decays can have much more interesting signatures. |
| first_indexed | 2024-04-12T03:30:45Z |
| format | Article |
| id | doaj.art-070df6eb0a2241de89486092cf970347 |
| institution | Directory Open Access Journal |
| issn | 0370-2693 1873-2445 |
| language | English |
| last_indexed | 2024-04-12T03:30:45Z |
| publishDate | 2018-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Physics Letters B |
| spelling | doaj.art-070df6eb0a2241de89486092cf9703472022-12-22T03:49:34ZengElsevierPhysics Letters B0370-26931873-24452018-01-01776C38539010.1016/j.physletb.2017.11.067Lepton flavor violation with displaced verticesJulian Heeck0Werner Rodejohann1Service de Physique Théorique, Université Libre de Bruxelles, Boulevard du Triomphe, CP225, 1050 Brussels, BelgiumMax-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, GermanyIf light new physics with lepton-flavor-violating couplings exists, the prime discovery channel might not be ℓ→ℓ′γ but rather ℓ→ℓ′X, where the new boson X could be an axion, majoron, familon or Z′ gauge boson. The most conservative bound then comes from ℓ→ℓ′+inv, but if the on-shell X can decay back into leptons or photons, displaced-vertex searches could give much better limits. We show that only a narrow region in parameter space allows for displaced vertices in muon decays, μ→eX,X→γγ,ee, whereas tauon decays can have much more interesting signatures.http://www.sciencedirect.com/science/article/pii/S0370269317309590 |
| spellingShingle | Julian Heeck Werner Rodejohann Lepton flavor violation with displaced vertices Physics Letters B |
| title | Lepton flavor violation with displaced vertices |
| title_full | Lepton flavor violation with displaced vertices |
| title_fullStr | Lepton flavor violation with displaced vertices |
| title_full_unstemmed | Lepton flavor violation with displaced vertices |
| title_short | Lepton flavor violation with displaced vertices |
| title_sort | lepton flavor violation with displaced vertices |
| url | http://www.sciencedirect.com/science/article/pii/S0370269317309590 |
| work_keys_str_mv | AT julianheeck leptonflavorviolationwithdisplacedvertices AT wernerrodejohann leptonflavorviolationwithdisplacedvertices |