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Lepton flavor violation and dilepton tails at the LHC.
- Source :
-
European Physical Journal C -- Particles & Fields . Jul2020, Vol. 80 Issue 7, pN.PAG-N.PAG. 1p. - Publication Year :
- 2020
-
Abstract
- Starting from a general effective Lagrangian for lepton flavor violation (LFV) in quark-lepton transitions, we derive constraints on the effective coefficients from the high-mass tails of the dilepton processes p p → ℓ k ℓ l (with k ≠ l ). The current (projected) limits derived in this paper from LHC data with 36 fb - 1 ( 3 ab - 1 ) can be applied to generic new physics scenarios, including the ones with scalar, vector and tensor effective operators. For purely left-handed operators, we explicitly compare these LHC constraints with the ones derived from flavor-physics observables, illustrating the complementarity of these different probes. While flavor physics is typically more constraining for quark-flavor violating operators, we find that LHC provides the most stringent limits on several flavor-conserving ones. Furthermore, we show that dilepton tails offer the best probes for charm-quark transitions at current luminosities and that they provide competitive limits for tauonic b → d transitions at the high-luminosity LHC phase. As a by-product, we also provide general numerical expressions for several low-energy LFV processes, such as the semi-leptonic decays K → π ℓ k ± ℓ l ∓ , B → π ℓ k ± ℓ l ∓ and B → K (∗) ℓ k ± ℓ l ∓ . [ABSTRACT FROM AUTHOR]
- Subjects :
- *TAILS
*FLAVOR
*MASS transfer coefficients
*WASTE products
*PHYSICS
*LUMINOSITY
Subjects
Details
- Language :
- English
- ISSN :
- 14346044
- Volume :
- 80
- Issue :
- 7
- Database :
- Academic Search Index
- Journal :
- European Physical Journal C -- Particles & Fields
- Publication Type :
- Academic Journal
- Accession number :
- 145271507
- Full Text :
- https://doi.org/10.1140/epjc/s10052-020-8210-5