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Search: authors:"Partha Konar"

6 papers found.
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Search for a compressed supersymmetric spectrum with a light gravitino

Presence of the light gravitino as dark matter candidate in a supersymmetric (SUSY) model opens up interesting collider signatures consisting of one or more hard photons together with multiple jets and missing transverse energy from the cascade decay. We investigate such signals at the 13 TeV LHC in presence of compressed SUSY spectra, consistent with the Higgs mass as well as ...

Production of heavy neutrino in next-to-leading order QCD at the LHC and beyond

Majorana and pseudo-Dirac heavy neutrinos are introduced into the type-I and inverse seesaw models, respectively, in explaining the naturally small neutrino mass. TeV scale heavy neutrinos can also be accommodated to have a sizable mixing with the Standard Model light neutrinos, through which they can be produced and detected at the high energy colliders. In this paper we consider ...

Constrained \( \sqrt{{\widehat{S}}_{\min }} \) and reconstructing with semi-invisible production at hadron colliders

Mass variable \( \sqrt{{\widehat{S}}_{\min }} \) and its variants [1, 2] were constructed by minimising the parton level center of mass energy that is consistent with all inclusive measurements. They were proposed to have the ability to measure mass scale of new physics in a fully model independent way. In this work we relax the criteria by assuming the availability of partial ...

A revisit to a compressed supersymmetric spectrum with 125 GeV Higgs

A compressed spectrum was initially proposed as an explanation for the elusiveness of low-energy supersymmetry (SUSY). Some characteristic signals at the Large Hadron Collider (LHC), such as mono-jet + , had been propounded as its trademark signals. However, later investigations suggested that lower limits on the supersymmetric particle masses would be quite stringent in spite of ...

RECO level \( {\sqrt {s}_{\min }} \) and subsystem improved \( {\sqrt {s}_{\min }} \) : global inclusive variables for measuring the new physics mass scale in events at hadron colliders

The variable \( {\sqrt {s}_{\min }} \) was originally proposed in [1] as a model-independent, global and fully inclusive measure of the new physics mass scale in missing energy events at hadron colliders. In the original incarnation of \( {\sqrt {s}_{\min }} \), however, the connection to the new physics mass scale was blurred by the effects of the underlying event, most notably ...

Dark matter particle spectroscopy at the LHC: generalizing M T2 to asymmetric event topologies

We consider SUSY-like missing energy events at hadron colliders and critically examine the common assumption that the missing energy is the result of two identical missing particles. In order to experimentally test this hypothesis, we generalize the subsystem M T2 variable to the case of asymmetric event topologies, where the two SUSY decay chains terminate in different “children” ...