Signatures of supersymmetry with non-universal Higgs mass at the Large Hadron Collider

TL;DR

This paper explores how non-universal Higgs masses in supersymmetric models affect collider signatures at the LHC, proposing methods to distinguish these from minimal models through tau polarization and charge asymmetry measurements.

Contribution

It introduces observable signatures, such as tau polarization asymmetry and jet-lepton charge asymmetry, to differentiate non-universal Higgs mass scenarios from minimal supergravity models at the LHC.

Findings

Left-chiral slepton dominance in NUHM scenarios

Tau polarization asymmetry as a distinguishing feature

Charge asymmetry in jet-lepton invariant mass distributions

Abstract

We discuss large non-universality in the Higgs sector at high scale in supersymmetric theories, in the context of the Large Hadron Collider (LHC). In particular, we note that if ${m_{H_u}}^2-{m_{H_d}}^2$ is large and negative ($\simeq 10^6 {\rm ~GeV^2}$) at high scale, the lighter slepton mass eigenstates at the electroweak scale are mostly left chiral, in contrast to a minimal supergravity (mSUGRA) scenario. We use this feature to distinguish between non-universal Higgs masses (NUHM) and mSUGRA by two methods. First, we study final states with same-sign ditaus. We find that an asymmetry parameter reflecting the polarization of the taus provides a notable distinction. In addition, we study a charge asymmetry in the jet-lepton invariant mass distribution, arising from decay chains of left-chiral squarks leading to leptons of the first two families, which sets apart an NUHM scenario of the above kind.