Investigating New Physics Models with Signature of Same-Sign Diboson + ${E\!\!/}_{T}$

TL;DR

This paper explores the potential of detecting new physics at the LHC through a unique signature of same-sign diboson plus missing transverse energy, analyzing three models with different particle mechanisms.

Contribution

It introduces a novel signature for new physics searches and compares its effectiveness across three distinct theoretical models at current and future collider runs.

Findings

The signature can distinguish between different new physics models.

Discovery prospects are promising at HL-LHC, HE-LHC, and FCC-hh.

Long-lived charged particles are key to the signature in some models.

Abstract

We investigate the prospect of searching for new physics via the novel signature of same-sign diboson + ${E\!\!/}_{T}$ at current and future LHC. We study three new physics models: (i) natural SUSY models, (ii) type-III seesaw model and (iii) type-II seesaw/Georgi-Machacek model. In the first two class of models, this signature arises due to the presence of a singly-charged particle which has lifetime long enough to escape detection, while in the third model this signature originates resonantly from a doubly-charged particle produced along with two forward jets that, most likely, would escape detection. We analyze in great detail the discovery prospects of the signal in these three classes of models in the current as well as the upcoming runs of the LHC (such as HL-LHC, HE-LHC and FCC-hh) by showing a distinction among these scenarios.