D. P. Roy

Higgsino Dark Matter in Nonuniversal Gaugino Mass Models

We study two simple and well motivated nonuniversal gaugino mass models, which predict higgsino dark matter. One can account for the observed dark matter relic density along with the observed Higgs boson mass of ~ 125 GeV over a large region of the parameter space of each model, corresponding to higgsino mass of ~ 1 TeV. In each case this parameter region covers the gluino mass range of 2-3 TeV, parts of which can be probed by the 14 TeV LHC experiments. We study these model predictions for LHC in brief and for dark matter detection experiments in greater detail.

Using Tau Polarisation for Charged Higgs Boson and SUSY Searches at the LHC

The т polarisation can be easily measured at the LHC in the 1-prong hadronic т decay channel by measuring what fraction of the т-jet momentum is carried by the charged track. A simple cut requiring this fraction to be τ; 0.8 retains most of the P т=+1 т -jet signal while suppressing the P т=−1 т-jet background and practically eliminating the fake t background. This can be utilised to extract the charged Higgs signal. It can be also utilised to extract the SUSY signal in the stau NLSP region, and in particular the stau co-annihilaton region.

Probing a mixed neutralino dark matter model at the 7 TeV LHC

We have analyzed the prospect of probing a non-universal gaugino mass model of mixed bino-higgsino dark matter at the current 7 TeV run of LHC. It provides cosmologically compatible dark matter relic density over two broad bands of parameters, corresponding to

Summary of the Activities of the Working Group I on High Energy and Collider Physics

m_{gl} < m_{sq}

Analysis of Leakage Flow Through the Flank Contacts in Transition Zone in Involute External Toothed Gear Pump

and

National Conference on Contemporary Issues in High Energy Physics and Cosmology (NC-HEPC 2013)

m_{gl} sim m_{sq}

Effects of SO(10)Dterms on SUSY signals at the Fermilab Tevatron

. The SUSY spectrum of this model has two distinctive features : (i) an approximate degeneracy among the lighter chargino and neutralino masses, and (ii) an inverted mass hierarchy of squark masses. We find that these features can be exploited to obtain a viable signal upto

Testing SUSY models for the muon g-2 anomaly via chargino-neutralino pair production at the LHC

m_{gl} sim

Effect of Modification in Flow Distributor Valve Geometry on the Pressure Drop and Chamber Pressures, in Numerical and Analytical Way, in ORBIT Motor HST Unit

800 GeV over both the parameter bands with an integrated luminosity 5/fb.

Working group summary: Neutrinos and beyond Standard Model

This is a summary of the projects undertaken by the Working Group I on High Energy Collider Physics at the Eighth Workshop on High Energy Physics Phenomenology (WHEPP8) held at the Indian Institute of Technology, Mumbai, January 5-16, 2004. The topics covered are (i) Higgs searches (ii) supersymmetry searches (iii) extra dimensions and (iv) linear collider.This is a summary of the projects undertaken by the working group I on high energy and collider physics.