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Subjects

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  • Bhatt, Jitesh R.; Natwariya, Pravin Kumar; Nayak, Alekha C.; Pandey, Arun Kumar (Cornell University Library, 2019-05)
    The Experiment to Detect the Global Epoch of reionization Signature (EDGES) collaboration has reported an excess absorption dip in the 21 cm signal during cosmic dawn era. The stronger than expected 21 absorption signal ...
  • Dhuria, Mansi; Hati, Chandan; Rangarajan, Raghavan; Sarkar, Utpal (Cornell University Library, 2015-03)
    We study the left-right symmetric extensions of the Standard Model (LRSM) and point out that the discovery of a right-handed charged gauge boson W±R with mass in the TeV range will have profound consequences for leptogenesis. ...
  • Anand Sengupta et. al. (Cornell University Library, 2019-01)
    We present a multi-messenger measurement of the Hubble constant H_0 using the binary-black-hole merger GW170814 as a standard siren, combined with a photometric redshift catalog from the Dark Energy Survey (DES). The ...
  • Mazumdar, Arindam; Mohanty, Subhendra; Parashari, Priyank (Cornell University Library, 2020-11)
    Self interaction in the active neutrinos is studied in the literature to alleviate the H0 tension. Similar self-interaction can also explain the observed dips in the flux of the neutrinos, coming from the distant astro-physical ...
  • Arya, Richa; Mahajan, Namit; Rangarajan, Raghavan (Cornell University Library, 2016-08)
    We study the production of spin 1/2 gravitinos in a thermal Universe. Taking into account supersymmetry breaking due to the finite thermal energy density of the Universe, there is a large enhancement in the cross section ...
  • Bhattacharya, Kaushik; Chakrabortty, Joydeep; Das, Suratna; Mondal, Tanmoy (Cornell University Library, 2014-08)
    Recent detection of B−mode polarization of the Cosmic Microwave Background by BICEP2 observations has surprisingly put the inflationary scale near Grand Unification scale if one considers single-field inflationary models. ...
  • Bhattacharyya, Sukannya; Mohanty, Subhendra; Parashari, Priyank (Cornell University Library, 2020-10)
    Recently, the NANOGrav collaboration has reported the evidence for a common-spectrum stochastic process, which might be interpreted as the first ever detection of stochastic gravitational wave (GW) background. We discuss ...
  • Sengupta, Anand (Cornell University Library, 2014-06)
    Gravitational waves from a variety of sources are predicted to superpose to create a stochastic background. This background is expected to contain unique information from throughout the history of the universe that is ...
  • Mazumdar, Arindam; Mohanty, Subhendra; Parashari, Priyank (Cornell University Library, 2019-11)
    Short baseline neutrino experiments, like LSND and MiniBooNE experiments, pointed towards the existence of eV mass scale sterile neutrinos. To reconcile sterile neutrinos with cosmology self interaction between sterile ...
  • Pandey, Arun Kumar; Natwariya, Pravin Kumar; Bhatt, Jitesh R (Cornell University Library, 2019-11)
    In the present work, we have studied the spectrum of the primordial gravitational waves due to magnetic instability in the presence of neutrino asymmetry. The magnetic instability generates a helical magnetic field on a ...
  • Sengupta, Anand (Cornell University Library, 2018-08)
    We present the first Advanced LIGO and Advanced Virgo search for ultracompact binary systems with component masses between 0.2 M⊙ - 1.0 M⊙ using data taken between September 12, 2015 and January 19, 2016. We find no viable ...
  • Lambiase, Gaetano; Mohanty, Subhendra; Narang, Ashish; Parashari, Priyank (Cornell University Library, 2018-04)
    It has been pointed out that there exists a tension in σ8−Ωm measurement between CMB and LSS observation. In this paper we show that σ8−Ωm observations can be used to test the dark energy theories. We study two models, (1) ...
  • Atreya, Abhishek; Bhatt, Jitesh R.; Mishra, Arvind Kumar (Cornell University Library, 2018-10)
    The viscosity of dark matter in cosmological models may cause an accelerated expansion and when this effect is sufficiently large, it can explain the dark energy. In this work, attributing the origin of viscosity to ...

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