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Science is the belief in the ignorance of experts



"Time is without beginning or end." (Aryabhata beyond Astronomy)

"Learn from yesterday, live for today, hope for tomorrow.The important thing is not to stop questioning" Einstein
Research interests 
I am a Theoretical Particle Physicists and work in the area of Particle Physics, Astrophysics and Cosmology. The phenomenological signatures of beyond the Standard Model(BSM) physics which can be searched in high energy colliders like  Large Hadron Collider(LHC), Linear Collider(LC) and astrophysical laboratory (e.g. star etc) interests me. At present I am working on the BSM signatures at high energy colliders and in Astrophysics using machine learning techniques.

# Research Publication click.
# Statistics: h-index and i10-index of my publication: click here.
Theoretical Elementary Particle Physics:
The question like: How the world is made of by the subatomic particles i.e. quarks, electrons, neutrinos and how they interact with each other? interests me. The answer of all these stems from a model called the Standard Model of Particle Physics (also know as the Glashow-Weinberg-Salam model).
The Weinberg-Salam model is very successful in terms of prediction. The recent finding of the Higgs boson (popularly known as the GOD particle which gives masses to everything of this universe)  on 4th July, 2012 was the ultimate success of this model. 
Despite this success, the model succumbs few drawbacks e.g. Hierarchy problem, flavour problem, neutrino mass, dark matter etc. This forces people to think: what is beyond the standard model? Is there any New Physics? If so, what is the scale of the New Physics? This was the driving force for a long time for many of the phenomenological investigations. Direct  searches of New Physics at the collider is one of the many interesting possibilities.
Present activity:  Currently, I am working on several phenomenological aspect of beyond the Standard Model(BSM) in particularly construction of BSM model and investigate their phenomenological aspects. In brief, my interest includes
  • Dark matter phenomenology: model construction and its phenomenological signatures 
  • Phenomenological investigation of the Extra dimensional models, Non-commutative Standard Model and Supersymmetry
  • Collider phenomenology: Searches of new physics at Large Hadron Collider at CERN and electron-positron Linear Collider.
In 1987 a supernova (SN1987A) was observed in a nearby galaxy called the Large Magellanic Cloud. This was the first "nearby" supernova in the last 3 centuries, and for the first time astronomers not only observed the light show, but also detected 19 of the elusive neutrinos (the detectors observed electron anti-neutrinos, to be more precise) produced by the collapse of the stars core. It is estimated that for an instant in 1987 on the earth the neutrino luminosity of SN1987A was as large as the visible-light luminosity of the entire universe. The kinetic energy of the explosion carries about 1% of the gravitational binding energy of about  ergs and the remaining 99% going into neutrinos. This powerful and detectable neutrino burst is the main astroparticle interest of core-collapse supernovae.
Now the numerical neutrino light curves can be compared with the SN1987A data where the measured energies are found to be “too low”.It is remain unclear whether this anomaly is due to a statistical problem or whether there is some New Physics. We explore the large extra dimension and warped spatial dimension scenarios. The light graviton KK modes or a stabilized radion can be produced inside the supernovae core due to the usual nucleon-nucleon bremstrahlung,electron-positron and photon-photon (photons inside plasma become massive, called plasmon )  annihilation.
Present activity:  Currently, in a collaboration with Dr. Bhupal Deb, Washington University, I am working on the relic density, SN1987A cooling and free-streaming constraint on several class of  BSM models. Also I am working on the signature of dark matter, dark energy in astrophysical and cosmology context. In brief, my interest includes

Cosmology and Astrophysics

  •  Dark matter, its collider and astrophysical signatures, dark energy in modified gravity theory

Research collaborators:
 1. Dr. Ajith P (ICTS, TIFR, Bangalore)
 2. Dr. Bhupal Dev, Washington University, USA (webpage) 
 3. Dr. K C Kong, University of Kansas, USA (webpage) 
 4. Dr. Douglas Mckay, University of Kansas, USA
 5. Dr. Partha Konar, PRL Ahmedabad (webpage)
 6. Dr. G C Samanta (Department of Mathematics, BITS Pilani Goa campus)
 5. Dr. Santosh Kr. Rai, HRI Allahabad (webpage)
 6. Dr. Ravi Manohar, University of Mumbai 
 7. Dr. N G Deshpane, University of Oregon, USA  
 8. Dr. K C Yang,  CYCU, Taiwan, ROC
 9. Dr. Pankaj Jain, IIT Kanpur
 10. Dr. Sreerup Raychaudhuri, TIFR, Mumbai
 11. Dr. Biswarup Mukhopadhyay, HRI, RECAPP, Allahabad
 12. Dr. Uma Mohanta(Late), HRI, Allahabad
 13. Dr. G. Rajasekaran, CMI, Chennai
 14. Dr. S. Garg, IMSc Chennai
 15. Mr. Anupam Mitra, BITS-Goa ex student and currently doing his Ph.D. at ISI Kolkata.
 16. Dr. Abhishodh Prakash, BITS-Goa ex-student and currently doing his Ph.D. at Stonybrook, NY, USA.
 17. Dr. V H Satheeshkumar (Instituto de Fisica,Rio de Janeiro, Brazil)

High Energy software packages: micrOMEGA, CalcHEP, LanHEP, FeynRule, MadGraph, Pythia, Feyncalc, Looptools
Other resources: Useful archive for papers, reviews, monographs and software  related to  High Energy Physics, Astrophysics,  visit  (i) LANL, (ii) Slac-Spires, (iii) NetAdvance, (iv) NeuUnb.


Research update 

Research News Colliders Research  & Industry Physics Education  School/

ILC  Symmetry  CPEP SERC school 
 Astronomy  ATLAS/LHC  AIPRF  AIP DST W'shop  SLAC
 Xtra dimension  CMS/LHC  ResearchGate  CERN    

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