Can the FCC-hh prove the B-L gauge symmetry?
5 affiliations
- 1Universidade Federal do Rio Grande do Norte
- 2Millennium Institute for Subatomic Physics at High-Energy Frontier (SAPHIR)
- 3Facultad de Ciencias, Universidad de La Serena
- 4Facultad de Ciencias Exactas, Universidad Andres Bello
- 5Sorbonne Université
Abstract
We present a phenomenological study of the discovery potential at the FCC-hh for a new heavy neutral vector boson, Z′ Z ′ , predicted by the U(1)B−L U ( 1 ) B - L gauge symmetry. Focusing on the parameter space currently not excluded by Large Hadron Collider data, we analyze the dilepton production channel p p → Z′ → l+ l− p p → Z ′ → l + l - ( l± = e± , μ ± l ± = e ± , μ ± ) at a center-of-mass energy of √s = 100 s = 100 TeV. Full Monte Carlo simulations were performed for different ( MZ' M Z ′ , gB−L g B - L ) BSM scenarios and relevant Standard Model backgrounds (including irreducible Drell-Yan, diboson, single top-quark and top-quark pair productions), identifying optimal kinematic selection cuts to guide future searches for this type of resonance. We estimate the FCC-hh reach for an integrated luminosity of ℒint L int = 30 ab−1 a b - 1 . Our results demonstrate that the FCC-hh at full operation can exclude Z′ Z ′ masses up to ∼ ∼ 50 TeV with 95% C.L. for couplings of gB−L ∼ 1 g B - L ∼ 1 , and up to ∼ ∼ 30 TeV for gB−L ∼ 0.1 g B - L ∼ 0.1 . We find the kinematic cuts that optimize the signal over background ratio and achieve a 5σ 5 σ signal up to Z′ Z ′ masses of ∼ ∼ 40 TeV. These findings highlight the FCC-hh potential to uncover new physics signals in the high-mass regime.
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BibTeX
@article{queiroz2026fcchh,
title = {{Can the FCC-hh prove the B-L gauge symmetry?}},
author = {Farinaldo S. Queiroz and J. Zamora-Saa and Ricardo C. Silva and Y. M. Oviedo-Torres},
journal = {The European Physical Journal C},
year = {2026},
month = oct,
doi = {10.1140/epjc/s10052-026-16519-w},
url = {https://link.springer.com/article/10.1140/epjc/s10052-026-16519-w},
note = {CC BY 4.0},
}
RIS
TY - JOUR
TI - Can the FCC-hh prove the B-L gauge symmetry?
AU - Farinaldo S. Queiroz
AU - J. Zamora-Saa
AU - Ricardo C. Silva
AU - Y. M. Oviedo-Torres
PY - 2026
DA - 2026/10/26
JO - The European Physical Journal C
DO - 10.1140/epjc/s10052-026-16519-w
UR - https://link.springer.com/article/10.1140/epjc/s10052-026-16519-w
AB - We present a phenomenological study of the discovery potential at the FCC-hh for a new heavy neutral vector boson, Z^′ Z ′ , predicted by the U(1)_B−L U ( 1 ) B - L gauge symmetry. Focusing on the parameter space currently not excluded by Large Hadron Collider data, we analyze the dilepton production channel p p → Z^′ → l^+ l^− p p → Z ′ → l + l - ( l^± = e^± , μ ^± l ± = e ± , μ ± ) at a center-of-mass energy of √s = 100 s = 100 TeV. Full Monte Carlo simulations were performed for different ( M_Z' M Z ′ , g_B−L g B - L ) BSM scenarios and relevant Standard Model backgrounds (including irreducible Drell-Yan, diboson, single top-quark and top-quark pair productions), identifying optimal kinematic selection cuts to guide future searches for this type of resonance. We estimate the FCC-hh reach for an integrated luminosity of ℒ_int L int = 30 ab^−1 a b - 1 . Our results demonstrate that the FCC-hh at full operation can exclude Z^′ Z ′ masses up to ∼ ∼ 50 TeV with 95% C.L. for couplings of g_B−L ∼ 1 g B - L ∼ 1 , and up to ∼ ∼ 30 TeV for g_B−L ∼ 0.1 g B - L ∼ 0.1 . We find the kinematic cuts that optimize the signal over background ratio and achieve a 5σ 5 σ signal up to Z^′ Z ′ masses of ∼ ∼ 40 TeV. These findings highlight the FCC-hh potential to uncover new physics signals in the high-mass regime.
SN - 1434-6044
SN - 1434-6052
ER -