Searching for new physics inside jets with the Herwig 7 generalised parton shower
4 affiliations
- 1Seoul National University
- 2Durham University
- 3University of Manchester
- 4Department of Theoretical Physics, CERN
Abstract
A bstract : This study investigates parton shower evolution incorporating both Standard Model (SM) and beyond-the-Standard-Model (BSM) radiation, focusing on the phenomenology of a massive Z ′ boson. While traditional approaches typically assume direct Z ′ production in the hard process, the possibility of Z ′ production within jets, enabled by subsequent emissions in the parton shower, offers a complementary opportunity to probe new physics through jet substructure and event topology. The newly developed Herwig 7 framework supporting BSM parton showers enables efficient simulation of Z ′ production in the logarithmically enhanced regime. Using a simple BSM benchmark, the minimal U(1) B - L extension of the SM, the interplay between the SM and BSM showers is evaluated to identify kinematic features that distinguish Z ′ -induced jets from conventional signatures. BSM-radiation signatures are contrasted with SM backgrounds such as QCD, top-quark, and Drell-Yan production, identifying potential discriminants for experimental searches. Experimental sensitivity at the LHC and prospective future colliders is estimated via statistical-significance projections. We find that Z ′ bosons produced through parton shower radiation populate non-isolated regions inside jets, providing an avenue for new-physics searches overlooked in traditional analyses.
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BibTeX
@article{kim2026searching,
title = {{Searching for new physics inside jets with the Herwig 7 generalised parton shower}},
author = {Taehee Kim and Joon-Bin Lee and M. R. Masouminia and Michael H. Seymour and Un-ki Yang},
journal = {Journal of High Energy Physics},
year = {2026},
month = oct,
doi = {10.1007/jhep10(2026)205},
url = {https://link.springer.com/article/10.1007/JHEP10(2026)205},
note = {CC BY 4.0},
}
RIS
TY - JOUR
TI - Searching for new physics inside jets with the Herwig 7 generalised parton shower
AU - Taehee Kim
AU - Joon-Bin Lee
AU - M. R. Masouminia
AU - Michael H. Seymour
AU - Un-ki Yang
PY - 2026
DA - 2026/10/19
JO - Journal of High Energy Physics
DO - 10.1007/jhep10(2026)205
UR - https://link.springer.com/article/10.1007/JHEP10(2026)205
AB - A bstract : This study investigates parton shower evolution incorporating both Standard Model (SM) and beyond-the-Standard-Model (BSM) radiation, focusing on the phenomenology of a massive Z ′ boson. While traditional approaches typically assume direct Z ′ production in the hard process, the possibility of Z ′ production within jets, enabled by subsequent emissions in the parton shower, offers a complementary opportunity to probe new physics through jet substructure and event topology. The newly developed Herwig 7 framework supporting BSM parton showers enables efficient simulation of Z ′ production in the logarithmically enhanced regime. Using a simple BSM benchmark, the minimal U(1) B - L extension of the SM, the interplay between the SM and BSM showers is evaluated to identify kinematic features that distinguish Z ′ -induced jets from conventional signatures. BSM-radiation signatures are contrasted with SM backgrounds such as QCD, top-quark, and Drell-Yan production, identifying potential discriminants for experimental searches. Experimental sensitivity at the LHC and prospective future colliders is estimated via statistical-significance projections. We find that Z ′ bosons produced through parton shower radiation populate non-isolated regions inside jets, providing an avenue for new-physics searches overlooked in traditional analyses.
SN - 1029-8479
ER -