Proposal for chiral bosons search at LHC via their unique new signature

TL;DR

This paper proposes a novel search strategy for chiral spin-1 bosons at the LHC, highlighting unique signatures such as the absence of a Jacobian peak and a distinctive 'swallowtail' angular distribution.

Contribution

It introduces a new detection approach for chiral bosons, emphasizing their unique signatures in dilepton invariant mass and angular distributions at the LHC.

Findings

Chiral bosons produce a Breit-Wigner resonance in dilepton mass.

Unique angular distribution ('swallowtail') identified for high invariant masses.

No Jacobian peak appears in lepton transverse momentum distribution.

Abstract

The resonance production of new chiral spin-1 bosons and their detection through the Drell--Yan process at the CERN LHC is considered. Quantitative evaluations of various differential cross-sections of the chiral bosons production are made within the CalcHEP package. The new neutral chiral bosons can be observed as a Breit--Wigner resonance peak in the invariant dilepton mass distribution, as usual. However, unique new signatures of the chiral bosons exist. First, there is no Jacobian peak in the lepton transverse momentum distribution. Second, the lepton angular distribution in the Collins-Soper frame for the high on-peak invariant masses of the lepton pairs has a peculiar "swallowtail" shape.