RT Journal Article
T1 Excited lepton triplet contribution to electroweak observables at one loop level
A1 Rehman, M.
A1 Gómez Santamaría, Mario Emilio
A1 Panella, O.
AB In this paper, we present the one-loop radiativecorrections to the electroweak precision observable  ρ com ing from the IW = 1 multiplet excited leptons. We have cal culated the couplings of the exotic lepton triplet to the vectorbosons and ordinary leptons using the effective Lagrangianapproach. These couplings are then used to estimate theexcited lepton triplet contribution to the  ρ parameter. Themass degenerate excited lepton contribution to  ρ is smalland can be neglected. However, if the excited leptons are non degenerate, their contribution can be large which can result inmore stringent constraints on the excited fermion parameterspace compared to the constraints from present experimentalsearches and perturbative unitarity condition
PB SpringerOpen
SN 1434-6044
SN 1434-6052 (electrónico)
YR 2021
FD 2021
LK http://hdl.handle.net/10272/20460
UL http://hdl.handle.net/10272/20460
LA eng
NO Rehman, M., Gomez, M.E. & Panella, O. Excited lepton triplet contribution to electroweak observables at one loop level. Eur. Phys. J. C 81, 392 (2021). https://doi.org/10.1140/epjc/s10052-021-09153-1
NO M. Rehman and M. E. Gomez wish to thank theIstituto Nazionale di Fisica Nucleare, INFN, Sezione di Perugia, forkind hospitality and support for collaboration visits during the earlyand final stages of this work. The research of M.E.G. was supportedby the Spanish MINECO, under grants FPA2017-86380 and PID2019-107844GB-C22
DS Repositorio Institucional de la Universidad de Huelva
RD 31 may 2026