Browsing Physics by Title

Browsing Physics by Title

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  • 10Be depositional flux variation in the central Indian Ocean during the last 43 ka 
    Jena, Partha Sarathi; Bhushan, Ravi; Ajay, Shivam; Bharti, Nisha; Sudheer, A. K. (Elsevier, 2022-01)
    The advent of Accelerator Mass Spectrometer (AMS) enhanced the application of meteoric 10Be (half-life of 1.39 Ma) as a tracer for understanding earth surface processes on thousand to million-year time scales. However, for ...
  • 21 cm line astronomy and constraining new physics 
    Natwariya, Pravin Kumar (Cornell University Library, 2023-01)
    The 21 cm signal appears to be a treasure trove to provide an insight into the period when the first generation of luminous objects formed in the Universe. Hydrogen is the predominating fraction of the total baryonic matter ...
  • The 2HDM doppelganger 
    Coleppa, Baradhwaj; Sarkar, Agnivo (Cornell University Library, 2020-11)
    We discuss the structure of a model with an extended gauge symmetry group SU(2)�SU(2)�U(1) with a correspondingly rich Electroweak Symmetry Breaking structure. In spite of the additional scalar degrees of freedom in the ...
  • The 2HDM doppelganger 
    Coleppa, Baradhwaj; Sarkar, Agnivo (SpringerOpen, 2022-06)
    We discuss the structure of a model with anextended gauge symmetry groupSU(2)×SU(2)×U(1)with a correspondingly rich Electroweak Symmetry Break-ing structure. In spite of the additional scalar degrees of free-dom ...
  • 331 models and grand unification: From minimal SU(5) to minimal SU(6) 
    Hati, Chandan; Deppisch, Frank F.; Patra, Sudhanwa; Sarkar, Utpal; Valle, Jose W. F. (Elsevier, 2016-11)
    We consider the possibility of grand unification of the SU(3)c⊗SU(3)L⊗U(1)X model in an SU(6) gauge unification group. Two possibilities arise. Unlike other conventional grand unified theories, in SU(6) one can embed the ...
  • 331 models and grand unification: from minimal SU(5) to minimal SU(6) 
    Deppisch, Frank F.; Hati, Chandan; Patra, Sudhanwa; Sarkar, Utpal; Valle, Jose W. F. (Cornell University Library, 2016-08)
    We consider the possibility of grand unification of the SU(3)c⊗SU(3)L⊗U(1)X model in an SU(6) gauge unification group. Two possibilities arise. Unlike other conventional grand unified theories, in SU(6) one can embed the ...
  • 750 GeV resonance in the dark left-right model 
    Dey, Ujjal Kumar; Mohanty, Subhendra; Tomar, Gaurav (Cornell University Library, 2015-12)
    We explain the 750 GeV diphoton resonance in the context of the dark left-right symmetric model. A global symmetry in this model, stabilizes the dark matter and ensures that the scalar couples only to gluons and photons. ...
  • 750 GeV resonance in the dark left-right model 
    Dey, Ujjal Kumar; Mohanty, Subhendra; Tomar, Gaurav (Elsevier, 2016-05)
    We explain the 750 GeV750 GeV diphoton resonance in the context of the dark left-right symmetric model. A global symmetry in this model, stabilizes the dark matter and ensures that the scalar couples dominantly to gluons ...
  • A case of anomalous electric field perturbations in the equatorial ionosphere during postsunset hours: insights 
    Kumar, Ankit; Chakrabarty, Dibyendu; Fejer, B. G.; Reeves, Geoffrey D.; Rout, Diptiranjan; Sripathi, S.; Seemala, Gopi K.; Sunda, Surendra; Yadav, Anil Kumar (Wiley, 2023-02)
    During a weak geomagnetic storm (Ap = 15) on 24 December 2014, the penetration electric field perturbations over the Indian dip equatorial sector are found to be anomalous on a number of occasions during postsunset hours. ...
  • Absence of an effective horizon for black holes in gravity's rainbow 
    Ali, Ahmed Farag; Faizal, Mir; Majumder, Barun (arXiv, Cornell University Library, 2014-06)
    We will argue that the divergence in time for the asymptotic observer occurs because of specifying the position of the Horizon beyond the Planck scale. In fact, a similar divergence in time will also occur for an in-going ...
  • Absence of an effective horizon for black holes in gravity's rainbow 
    Ali, Ahmed Farag; Faizal, Mir; Majumder, Barun (IOP Science, 2015-01)
    We argue that the divergence in time for an asymptotic observer occurs because of specifying the position of the Horizon beyond the Planck scale. In fact, a similar divergence in time will also occur for an in-going observer ...
  • Absorption variability of the highly obscured active galactic nucleus NGC 4507 
    Jana, Arghajit; Ricci, Claudio; Naik, Sachindra; Tanimoto, Atsushi; Kumari, Neeraj; Chang, Hsiang-Kuang; Nandi, Prantik; Chatterjee, Arka; Safi-Harb, Samar (Cornell University Library, 2022-03)
    We present a detailed study of the highly obscured active galaxy NGC 4507, performed using four Nuclear Spectroscopic Telescope Array (NuSTAR) observations carried out between May and August in 2015 (~ 130 ks in total). ...
  • Absorption variability of the highly obscured active galactic nucleus NGC 4507 
    Jana, Arghajit; Ricci, Claudio; Naik, Sachindra; Tanimoto, Atsushi; Kumari, Neeraj; Chang, Hsiang-Kuang; Nandi, Prantik; Chatterjee, Arka; Safi-Harb, Samar (Royal Astronomical Society, 2022-06)
    We present a detailed study of the highly obscured active galaxy NGC 4507, performed using four Nuclear Spectroscopic Telescope Array (NuSTAR) observations carried out between May and August in 2015 (?130 ks in total). ...
  • Ac-Susceptibility Study in Rare Earth Substituted Magnetite Ferrofluids 
    Upadhyay, Ramesh V.; Parekh, Kinnari; Banerjee, A.; Kumar, Kranti (2010-08-20)
    It is shown that variation of the third order ac-susceptibility as a function of measuring field and frequency lead to distinguish between superparamagnetic and spin glass like ordering in the rare earth substituted magnetic ...
  • Acceleration of solar energetic particles by the shock of interplanetary coronal mass ejection 
    Mondal, Shanwlee Sow; Sarkar, Aveek; Vaidya, Bhargav; Mignone, Andrea (Cornell University Library, 2021-10)
    Interplanetary Coronal Mass Ejection (ICME) shocks are known to accelerate particles and contribute significantly to Solar Energetic Particle (SEP) events. We have performed Magnetohydrodynamic-Particle in Cell (MHD-PIC) ...
  • Acceleration of solar energetic particles by the shock of interplanetary coronal mass ejection 
    Mondal, Shanwlee Sow; Sarkar, Aveek; Vaidya, Bhargav; Mignone, Andrea, (IOP Publishing, 2021-12)
    Interplanetary coronal mass ejection (ICME) shocks are known to accelerate particles and contribute significantly to solar energetic particle events. We have performed magnetohydrodynamic-particle in cell simulations of ...
  • Accretion properties of MAXI J1813-095 during its failed outburst in 2018 
    Jana, Arghajit; Jaisawal, Gaurava K.; Naik, Sachindra; Kumari, Neeraj; Chatterjee, Debjit; Chatterjee, Kaushik; Bhowmick, Riya; Chakrabarti, Sandip K.; Chang, Hsiang-Kuang; Debnath, Dipak (Cornell University Library, 2021-04)
    We present the results obtained from detailed timing and spectral studies of a black hole candidate MAXI~J1813-095 using (it Swift}, (it NICER), and (it NuSTAR) observations during its 2018 outburst. The timing behaviour ...
  • Accretion properties of MAXI J1813-095 during its failed outburst in 2018 
    Jana, Arghajit; Jaisawal, Gaurava K.; Naik, Sachindra; Kumari, Neeraj; Chatterjee, Debjit; Chatterjee, Kaushik; Bhowmick, Riya; Chakrabarti, Sandip K.; Chang, Hsiang-Kuang; Debnath, Dipak (IOP Publishing, 2021-06)
    We present the results obtained from detailed timing and spectral studies of a black hole candidate MAXI J1813-095 using Swift, NICER, and NuSTAR observations during its 2018 outburst. The timing behavior of the source is ...
  • Acoustic radiation from vortex-barrier interaction in atomic Bose-Einstein condensate 
    Suthar, Kuldeep; Roy, Arko; Angom, D. (Cornell University Library, 2014-05)
    We examine the dynamics of a vortex dipole in the Bose-Einstein condensates (BECs) of trapped dilute atomic gases at zero temperature in the presence of a Gaussian barrier potential. The density-anisotropy induced by the ...
  • Acoustic radiation from vortex–barrier interaction in atomic Bose–Einstein condensate 
    Suthar, Kuldeep; Roy, Arko; Angom, D. (IOP Science, 2014-06)
    We examine the dynamics of a vortex dipole in the Bose–Einstein condensates of trapped dilute atomic gases at zero temperature in the presence of a Gaussian barrier potential. The density anisotropy induced by the barrier ...

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