TY - JOUR
T1 - Probing the minimal U (1)X model at future electron-positron colliders via fermion pair-production channels
AU - Das, Arindam
AU - Dev, P. S.Bhupal
AU - Hosotani, Yutaka
AU - Mandal, Sanjoy
N1 - Publisher Copyright:
© 2022 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the "http://creativecommons.org/licenses/by/4.0/"Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP3.
PY - 2022/6/1
Y1 - 2022/6/1
N2 - The minimal U(1)X extension of the Standard Model (SM) is a well-motivated new physics scenario, where anomaly cancellation dictates new neutral gauge boson (Z′) couplings with the SM fermions in terms of the U(1)X charges of the new scalar fields. We investigate the SM charged fermion pair-production process for different values of these U(1)X charges at future e-e+ colliders: e+e-→ff¯. Apart from the standard γ and Z-mediated processes, this model features additional s-channel (or both s and t-channel when f=e-) Z′ exchange which interferes with the SM processes. We first estimate the bounds on the U(1)X coupling (g′) and the Z′ mass (MZ′) considering the latest dilepton and dijet constraints from the heavy resonance searches at the LHC. Then using the allowed values of g′, we study the angular distributions, forward-backward (AFB), left-right (ALR), and left-right forward-backward (ALR,FB) asymmetries of the ff¯ final states. We find that these observables can show substantial deviations from the SM results in the U(1)X model, thus providing a powerful probe of the multi-TeV Z′ bosons at future e+e- colliders.
AB - The minimal U(1)X extension of the Standard Model (SM) is a well-motivated new physics scenario, where anomaly cancellation dictates new neutral gauge boson (Z′) couplings with the SM fermions in terms of the U(1)X charges of the new scalar fields. We investigate the SM charged fermion pair-production process for different values of these U(1)X charges at future e-e+ colliders: e+e-→ff¯. Apart from the standard γ and Z-mediated processes, this model features additional s-channel (or both s and t-channel when f=e-) Z′ exchange which interferes with the SM processes. We first estimate the bounds on the U(1)X coupling (g′) and the Z′ mass (MZ′) considering the latest dilepton and dijet constraints from the heavy resonance searches at the LHC. Then using the allowed values of g′, we study the angular distributions, forward-backward (AFB), left-right (ALR), and left-right forward-backward (ALR,FB) asymmetries of the ff¯ final states. We find that these observables can show substantial deviations from the SM results in the U(1)X model, thus providing a powerful probe of the multi-TeV Z′ bosons at future e+e- colliders.
UR - https://www.scopus.com/pages/publications/85133815155
U2 - 10.1103/PhysRevD.105.115030
DO - 10.1103/PhysRevD.105.115030
M3 - Article
AN - SCOPUS:85133815155
SN - 2470-0010
VL - 105
JO - Physical Review D
JF - Physical Review D
IS - 11
M1 - 115030
ER -