TY  - JOUR
AU  - Escribano, P.
AU  - Vicente, A.
PY  - 2021
DA  - 2021//
TI  - Ultralight scalars in leptonic observables
T2  - J. High Energy Phys.
JO  - Journal of High Energy Physics
SP  - 240
EP  - 37pp
VL  - 03
IS  - 3
PB  - Springer
KW  - Beyond Standard Model
KW  - CP violation
KW  - Neutrino Physics
AB  - Many new physics scenarios contain ultralight scalars, states which are either exactly massless or much lighter than any other massive particle in the model. Axions and majorons constitute well-motivated examples of this type of particle. In this work, we explore the phenomenology of these states in low-energy leptonic observables. After adopting a model independent approach that includes both scalar and pseudoscalar interactions, we briefly discuss the current limits on the diagonal couplings to charged leptons and consider processes in which the ultralight scalar phi is directly produced, such as μ-> e phi, or acts as a mediator, as in tau -> μμmu. Contributions to the charged leptons magnetic and electric moments are studied as well.
SN  - 1029-8479
UR  - https://arxiv.org/abs/2008.01099
UR  - https://doi.org/10.1007/JHEP03(2021)240
DO  - 10.1007/JHEP03(2021)240
LA  - English
N1  - WOS:000635264700005
ID  - Escribano+Vicente2021
ER  -