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Now showing items 191-210 of 346

Magnetic field induced enhancement in thermal conductivity of magnetite nanofluid

Parekh, Kinnari; Lee, Hyo Sook (American Institute of Physics (AIP), 2010-04)

Magnetite nanofluid is synthesized using continuous chemical process. Powderx-ray diffraction and transmission electron microscopy show single phase spinel structure with size of 9.83 and 9.9 nm, respectively. Thermal ...
Massless charged particles: Cosmic censorship, and the third law of black hole mechanics

Fairoos, C.; Ghosh, Avirup; Sarkar, Sudipta (American Physical Society, 2017-10)

The formulation of the laws of Black hole mechanics assumes the stability of black holes under perturbations in accordance with the “cosmic censorship hypothesis” (CCH). CCH prohibits the formation of a naked singularity ...
Measuring CP nature of top-Higgs couplings at the future large hadron electron collider

Coleppa, Baradhwaj; Kumar, Mukesh; Kumar, Satendra; Mellado, Bruce (Elsevier, 2017-07)

We investigate the sensitivity of top-Higgs coupling by considering the associated vertex as CP phase (ζt) dependent through the process View the MathML source in the future Large Hadron electron Collider. In particular ...
Medium effects on the electrical conductivity of a hot pion gas

Ghosh, Snigdha; Mitra, Sukanya; Sarkar, Sourav (Elsevier B.V., 2018-01)

The electromagnetic response of an interacting system of pions has been studied at finite temperature. The corresponding transport parameter i.e. electrical conductivity has been estimated by solving the relativistic ...
Medium effects on the electrical conductivity of a hot pion gas

Ghosh, Snigdha; Mitra, Sukanya; Sarkar, Sourav (Elsevier, 2017-10)

The electromagnetic response of an interacting system of pions has been studied at finite temperature. The corresponding transport parameter i.e. electrical conductivity has been estimated by solving the relativistic ...
Memory function approach to correlated electron transport: A comprehensive review

Bhalla, Pankaj; Das, Nabyendu; Singh, Navinder (World Scientific Publishing, 2016-09)

Memory function formalism or projection operator technique is an extremely useful method to study the transport and optical properties of various condensed matter systems. A recent revival of its uses in various correlated ...
Methods and results of a search for gravitational waves associated with gamma-ray bursts using the GEO 600, LIGO, and Virgo detectors

Sengupta, Anand (American Physical Society (APS), 2014-06)

In this paper we report on a search for short-duration gravitational wave bursts in the frequency range 64 Hz–1792 Hz associated with gamma-ray bursts (GRBs), using data from GEO 600 and one of the LIGO or Virgo detectors. ...
Microscopic-macroscopic approach for binding energies with the Wigner-Kirkwood method

Bhagwat, Ameeya A.; Viñas, X.; Centelles, M.; Schuck, P.; Wyss, R. (American Physical Society, 2010-04)

The semiclassical Wigner-Kirkwood ℏ expansion method is used to calculate shell corrections for spherical and deformed nuclei. The expansion is carried out up to fourth order in ℏ. A systematic study of Wigner-Kirkwood ...
Modeling interacting dynamic networks: I. Preferred degree networks and their characteristics

Liu, Wenjia; Jolad, Shivakumar; Schmittmann, Beate; Zia, R. K. P. (IOP Publishing, 2013-08)

We study a simple model of dynamic networks, characterized by a set preferred degree, κ. Each node with degree k attempts to maintain its κ and will add (cut) a link with probability w(k;κ) (1 − w(k;κ)). As a starting ...
Moduli induced cogenesis of baryon asymmetry and dark matter

Dhuria, Mansi; Hati, Chandan; Sarkar, Utpal (Elsevier, 2016-05)

We study a cogenesis mechanism in which the observed baryon asymmetry of the universe and the dark matter abundance can be produced simultaneously at low reheating temperature without violating baryon number in the fundamental ...
Moment expansion to the memory function for generalized Drude scattering rate

Bhalla, Pankaj; Das, Nabyendu; Singh, Navinder (Elsevier, 2016-05)

The memory function formalism is an important tool to evaluate the frequency dependent electronic conductivity. It is previously used within some approximations in the case of electrons interacting with various other degrees ...
Monitoring self-assembly and ligand exchange of PbS nanocrystal superlattices at the liquid/air interface in real time

Maiti, Santanu; André, Alexander; Banerjee, Rupak; Hagenlocher, Jan; Konovalov, Oleg; Schreiber, Frank; Scheele, Marcus (American chemical Society, 2018-01)

We investigate in situ the structural changes during self-assembly of PbS nanocrystals from colloidal solution into superlattices, solvent evaporation, and ligand exchange at the acetonitrile/air interface by grazing ...
Monodispersed Magnetic Fluids: Synthesis and Characterization

Parekh, Kinnari; Upadhyay, Ramesh V.; Aswal, V. K. (Trans Tech Publications, 2009-05)

Magnetite and Co ferrite particles were synthesized with control of particle size distribution via non-aqueous route. The XRD pattern shows the formation of single phase spinel structure with the particle size of 96 Å and ...
Multi-messenger observations of a ninary Neutron star merger

Sengupta, Anand (IOP Publishing, 2017-10)

On 2017 August 17 a binary neutron star coalescence candidate (later designated GW170817) with merger time 12:41:04 UTC was observed through gravitational waves by the Advanced LIGO and Advanced Virgo detectors. The Fermi ...
Multi-wavelength study of blazars using variability as a tool

Kaur, Navpreet; Baliyan, Kiran S.; Chandra, Sunil; Sameer; Ganesh, Shashikiran (The Korean Space Science Society, 2016)

Active galactic nuclei (AGN) are too compact to be resolved by any existing optical telescope facility, making it difficult to understand their structure and the emission processes responsible for their huge energy output. ...
Multimessenger search for sources of gravitational waves and high-energy neutrinos: Initial results for LIGO-Virgo and IceCube

Sengupta, Anand; (American Physical Society, 2014-11)

We report the results of a multimessenger search for coincident signals from the LIGO and Virgo gravitational-wave observatories and the partially completed IceCube high-energy neutrino detector, including periods of joint ...
Multiwavelength observations of a VHE gamma-ray flare from PKS 1510−089 in 2015

Kaur, Navpreet (EDP sciences, 2017-07)

Context. PKS 1510−089 is one of only a few flat spectrum radio quasars detected in the very-high-energy (VHE, > 100 GeV) gamma-ray band. Aims. We study the broadband spectral and temporal properties of the PKS 1510−089 ...
A multiwavelength study of flaring activity in the high-energy peaked BL lac object 1ES 1959+650 during 2015-2016

Kaur, Navpreet; Chandra, Sunil; Baliyan, Kiran S.; Sameer; Ganesh, Shashikiran (American Astronomical Society, 2017-09)

We present the results from a multiwavelength study of the flaring activity in the high-energy peaked BL Lac object 1ES 1959+650 during 2015 January–2016 June. The source underwent two major outbursts, during 2015 March ...
Muon anomalous magnetic moment and positron excess at AMS-02 in a gauged horizontal symmetric model

Tomar, Gaurav; Mohanty, Subhendra (Springer, 2014-11)

We studied an extension of the standard model with a fourth generation of fermions to explain the discrepancy in the muon (g −2) and explain the positron excess seen in the AMS-02 experiment. We introduce a gauged SU(2)HV ...
Naked singularities are not singular in distorted gravity

Garattini, Remo; Majumder, Barun (Elsevier, 2014-07)

We compute the Zero Point Energy (ZPE) induced by a naked singularity with the help of a reformulation of the Wheeler–DeWitt equation. A variational approach is used for the calculation with Gaussian Trial Wave Functionals. ...

Now showing items 191-210 of 346

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