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82 papers · 1 filter

nucl-th2005★ 1 cited

Hadrons in compact stars

Debades Bandyopadhyay

We discuss -equilibrated and charge neutral matter involving hyperons and condensates within relativistic models. It is observed that populations of baryons are strongl…

cond-mat.stat-mech2005

A two-fractal overlap model of earthquakes

Bikas K Chakrabarti, Arnab Chatterjee

We introduce here the two-fractal model of earthquake dynamics. As the fractured surfaces have self-affine properties, we consider the solid-solid interface of the earth's crust an…

nucl-th2005★ 13 cited

Nuclear expansion with excitation

J. N. De, S. K. Samaddar, X. Vinas +1

The expansion of an isolated hot spherical nucleus with excitation energy and its caloric curve are studied in a thermodynamic model with the SkM* force as the nuclear effective tw…

nucl-th2005★ 18 cited

Hyperon production in near threshold nucleon-nucleon collisions

Radhey Shyam

We study the mechanism of the associated Lambda-kaon and Sigma-kaon production in nucleon-nucleon collisions over an extended range of near threshold beam energies within an effect…

nlin.SI2005★ 24 cited

Integrable Hierarchy of Higher Nonlinear Schrödinger Type Equations

Anjan Kundu

Addition of higher nonlinear terms to the well known integrable nonlinear Schrödinger (NLS) equations, keeping the same linear dispersion (LD) usually makes the system nonintegrabl…

hep-ph2005★ 5 cited

Baryogenesis via Leptogenesis in presence of cosmic strings

Narendra Sahu, Pijushpani Bhattacharjee, Urjit A Yajnik

We study the effect on leptogenesis due to cosmic strings of a extension of the Standard Model. The disappearance of closed loops of cosmic strings can pro…

hep-ph2005★ 1 cited

Studying the effects of minimal length in large extra dimensional models in the jet + missing energy channels at hadron colliders

Gautam Bhattacharyya, Kumar Rao, K. Sridhar

Theories of quantum gravity suggest the existence of a minimal length scale. We study the consequences of a particular implementation of the idea of a minimal length scale in the m…

cond-mat.stat-mech2005★ 3 cited

Driven diffusive systems of active filament bundles

P. K. Mohanty, K. Kruse

The cytoskeleton is an important subsystem of cells that is involved for example in cell division and locomotion. It consists of filaments that are cross-linked by molecular motors…

cond-mat.dis-nn2005★ 6 cited

Analysis of the long-range random field quantum antiferromagnetic Ising model

Bikas K. Chakrabarti, Arnab Das, Jun-ichi Inoue

We introduce a solvable quantum antiferromagnetic model. The model, with Ising spins in a transverse field, has infinite range antiferromagnetic interactions with random fields on…

cond-mat.soft2005★ 16 cited

Unzipping DNA by force: thermodynamics and finite size behaviour

Rajeev Kapri, Somendra M. Bhattacharjee

We discuss the thermodynamic behaviour near the force induced unzipping transition of a double stranded DNA in two different ensembles. The Y-fork is identified as the coexisting p…

physics.soc-ph2005★ 25 cited

A common origin of the power law distributions in models of market and earthquake

Pratip Bhattacharyya, Arnab Chatterjee, Bikas K Chakrabarti

We show that there is a common mode of origin for the power laws observed in two different models: (i) the Pareto law for the distribution of money among the agents with random sav…

hep-ph2005★ 20 cited

Neutrinos in the simplest little Higgs scenario and TeV leptogenesis

Asmaa Abada, Gautam Bhattacharyya, Marta Losada

The little Higgs scenario may provide an interesting framework to accommodate TeV scale leptogenesis because a TeV Majorana mass of the right-handed neutrino that we employ for the…

hep-ph2005★ 23 cited

Energy loss and dynamical evolution of quark spectra

Pradip Roy, Abhee K. Dutt-Mazumder, Jan-e Alam

Average energy loss of light quarks has been calculated in a two stage equilibrium scenario where the quarks are executing Brownian motion in a gluonic heat bath. The evolution of…

hep-ph2005★ 10 cited

Gravitational decay of the Z-boson

Jose F. Nieves, Palash B. Pal

We study the decay process of the Z boson to a photon and a graviton. The most general form of the on-shell amplitude, subject to the constraints due to the conservation of the ele…

cond-mat.mtrl-sci2005★ 88 cited

Lattice expansion and non-collinear to collinear ferrimagnetic order in MnCrO nanoparticle

R. N. Bhowmik, R. Ranganathan, R. Nagarajan

We report magnetic behaviour of MnCrO, which belongs to a special class of spinel, known as chromite. Bulk MnCrO shows a sequence of magnetic states, which follows…

hep-th2005★ 8 cited

Gauge-invariant dressed fermion propagator in massless QED_3

Indrajit Mitra, Raghunath Ratabole, H. S. Sharatchandra

The infrared behaviour of the gauge-invariant dressed fermion propagator in massless QED_3 is discussed for three choices of dressing. It is found that only the propagator with the…

cond-mat.mes-hall2005★ 17 cited

Evidence of ratchet effect in nanowires of a conducting polymer

A. Rahman, M. K. Sanyal, R. Gangopadhayy +2

Ratchet effect, observed in many systems starting from living organism to artificially designed device, is a manifestation of motion in asymmetric potential. Here we report results…

physics.data-an2005

Time series of stock price and of two fractal overlap: Anticipating market crashes?

Bikas K. Chakrabarti, Arnab Chatterjee, Pratip Bhattacharyya

We find prominent similarities in the features of the time series for the overlap of two Cantor sets when one set moves with uniform relative velocity over the other and time serie…

cond-mat.other2005★ 6 cited

Specific heat of Bosons in a lattice

R. Ramakumar, A. N. Das

We present a theoretical study of specific heat of bosons () in a simple cubic lattice. We have studied the non-interacting bosons and the Tonks gas. For both cases, the …

hep-th2005★ 6 cited

Gauge dependence of the infrared behaviour of massless QED_3

Indrajit Mitra, Raghunath Ratabole, H. S. Sharatchandra

Using the Zumino identities it is shown that in a class of non-local gauges, massless QED_3 has an infrared behaviour of a conformal field theory with a continuously varying anomal…

hep-ph2005★ 12 cited

Possible violation of the spin-statistics relation for neutrinos: checking through future galactic supernova

Sandhya Choubey, Kamales Kar

We use the detection of neutrinos from a future galactic type-II supernova event in a water Cerenkov detector like Super-Kamiokande to constrain the possible violation of spin-stat…

cond-mat.str-el2005★ 7 cited

Biaxial spin-nematic phase of two dimensional disordered rotor models and spin-one bosons in optical lattices

Jean-Sebastien Bernier, K. Sengupta, Yong Baek Kim

We show that the ground state of disordered rotor models with quadrupolar interactions can exhibit biaxial nematic ordering in the disorder-averaged sense. We present a mean-field…

nucl-th2005★ 11 cited

Relativistic mean field study of neutron rich even-even C and Be isotopes

G. Gangopadhyay, Subinit Roy

Ground state properties of neutron rich even-even Be and C nuclei have been investigated using Relativistic Mean Field approach in co-ordinate space. The positions of the neutron d…

cond-mat.mtrl-sci2005

Detecting onset of chain scission and crosslinking of gamma-ray irradiated elastomer surfaces using frictional force microscopy

S. Banerjee, N. K. Sinha, N. Gayathri +4

We report here that atomic force microscope (AFM) in frictional force mode can be used to detect onset of chain scission and crosslinking in polymeric and macromolecular samples up…