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Browsing by Author "Bhattacharjee, P"

Browsing by Author "Bhattacharjee, P"

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  • Relics of the cosmological QCD phase transition 
    Bhattacharyya, A; Alam, J. E; Sarkar, S; Roy, P; Sinha, B; Raha, S; Bhattacharjee, P (The American Physical Society, 2000-04)
    The abundance and size distribution of quark nuggets ~QN’s!, formed a few microseconds after the big bang due to a first-order QCD phase transition in the early universe, has been estimated. It appears that stable QN’s could ...
  • Singature of Dirac vs majorana of neutrinos from HECR 
    Balaji, K. R. S; Bhattacharjee, P; Mohanty, S; Nayak, S. N (Indian Academy of Sciences, 2000-08)
  • Status of the Himalayan Gamma-Ray Observatory (HIGRO) and observation with HAGAR at very high energies 
    Britto, R. J; Acharya, B. S; Anupama, G. C; Bhatt, N; Bhattacharjee, P; Bhattacharya, S; Chitnis, V. R; Cowsik, R; Dorji, N; Duhan, S. K; Gothe, K. S; Kamath, P. U; Koul, R; Mahesh, P. K; Manoharan, J; Mitra, A; Nagesh, B. K; Parmar, N. K; Prabhu, T. P; Rannot, R. C; Rao, S. K; Saha, L; Saleem, F; Saxena, A. K; Sharma, S. K; Shukla, A; Singh, B. B; Srinivasan, R; Srinivasulu, G; Sudersanan, P. V; Tickoo, A. K; Tsewang, D; Upadhya, S. S; Vishwanath, P. R; Yadav, K. K (French Society of Astronomy and Astrophysics, 2011-12)
    High Altitude GAmma Ray (HAGAR) telescope array, which is the first stage of HImalayan Gamma Ray Observatory (HIGRO), has been successfully installed at Hanle in Himalayas and has been collecting science data since September, ...
  • A study of the performance parameters of the High Altitude Gamma Ray (HAGAR) telescope system at Ladakh in India 
    Saha, L; Chitnis, V. R; Vishwanath, P. R; Kale, S; Shukla, A; Acharya, B. S; Anupama, G. C; Bhattacharjee, P; Britto, R. J; Prabhu, T. P; Singh, B. B (Elsevier Science B.V., 2013-02)
    We present results of Monte Carlo simulations for the High Altitude Gamma Ray (HAGAR) telescope array which detects very high energy gamma rays from astronomical sources. This telescope array, located at Hanle at an altitude ...
  • Survivability of cosmological quark nuggets in the chromoelectric flux-tube fission model of baryon evaporation 
    Bhattacharjee, P; Alam, J. E; Sinha, B; Raha, S (The American Physical Society, 1993-11-15)
    The question of the survivability of quark nuggets against the process of baryon evaporation from their surfaces is studied within the context of a dynamical model, namely, the chromoelectric flux-tube fission model of ...
  • TeV and Superheavy Particles from Supersymmetric Topological Defects, the Extragalactic γ-ray Background, and the Highest Energy Cosmic Rays 
    Bhattacharjee, P; Shafi, Qaisar; Stecker, F. W (The American Physical Society, 1998-04)
    Cosmic topological defects in a wide class of supersymmetric theories can simultaneously be sources of Higgs bosons of mass~supersymmetry breaking scale~TeV, as well as superheavy gauge bosons of mass~η>>1 TeV, η being the ...
  • Towards new analysis of Gamma-Ray sources at HImalayan Gamma-Ray Observatory (HIGRO) in northern India 
    Britto, R. J; Acharya, B. S; Anupama, G. C; Bhatt, N; Bhattacharjee, P; Bhattacharya, S; Chitnis, V. R; Cowsik, R; Dorji, N; Duhan, S. K; Gothe, K. S; Kamath, P. U; Koul, R; Mahesh, P. K; Mitra, A; Nagesh, B. K; Parmar, N. K; Prabhu, T. P; Rannot, R. C; Rao, S. K; Saha, L; Saleem, F; Saxena, A. K; Sharma, S. K; Shukla, A; Singh, B. B; Srinivasan, R; Srinivasulu, G; Sudersanan, P. V; Tickoo, A. K; Tsewang, D; Upadhya, S. S; Vishwanath, P. R; Yadav, K. K (French Society of Astronomy and Astrophysics, 2010-12)
    The High Altitude GAmma-Ray (HAGAR) array is a wavefront sampling array of 7 telescopes, set-up at Hanle, at 4270 m a.s.l., in the Ladakh region of the Himalayas (North India). It constitutes the first phase of the HImalayan ...
  • Ultra high energy cosmic rays above 1011 GeV: Hints to new physics beyond Standard Model 
    Bhattacharjee, P (Indian Academy of Sciences, 2000-08)
    The observed cosmic ray events above 10/Sup11 GeV are difficult to explain within the context of known physics of propagation of known particles in the Universe and within the standard acceleration mechanisms that are ...
  • Ultra-high energy cosmic rays and prompt TeV gamma rays from gamma ray bursts 
    Bhattacharjee, P; Gupta, N (Indian Academy of Sciences, 2004-03)
    Gamma ray bursts (CRBs) have been proposed as one possible class of sources of the ultrahigh energy cosmic ray (UHECR) events observed up to energies greater than or similar to 10(20) eV. The synchrotron radiation of the ...
  • Ultrahigh energy cosmic rays from topological defects-cosmic strings, monopoles, necklaces, and all that 
    Bhattacharjee, P (American Institute of Physics, 1998-06)
    The topological defect scenario of origin of the observed highest energy cosmic rays is reviewed. Under a variety of circumstances, topological defects formed in the early Universe can be sources of very massive particles ...
  • VHE gamma-ray observation of Crab Nebula with HAGAR telescope array 
    Singh, B. B; Britto, R. J; Chitnis, V. R; Shukla, A; Saha, L; Sinha, A; Acharya, B. S; Vishwanath, P. R; Anupama, G. C; Bhattacharjee, P; Gothe, K .S; Nagesh, B. K; Prabhu, T. P; Rao, S. K; Srinivasan, R; Upadhya, S. S (Springer, 2019-12)
    HAGAR is a system of seven Non-imaging Atmospheric Cherenkov Telescopes located at Hanle in the Ladakh region of the Indian Himalay as at an altitude of 4270 meters amsl . Since 2008, we have observed the Crab Nebula to ...

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