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187 papers · 1 filter
Weak and strong dynamic scaling in a one-dimensional driven coupled-field model: Effects of kinematic waves
Dibyendu Das, Abhik Basu, Mustansir Barma +1
We study the coupled dynamics of the displacement fields in a one dimensional coupled-field model for drifting crystals, first proposed by R.Lahiri and S.Ramaswamy [{\em Phys. Rev.…
On the source of QPO of the black hole candidate GRS1915+105: some new observations and their interpretation
Anuj Nandi, Sivakumar G. Manickam, A. R. Rao +1
A few classes of the light curve of the black hole candidate GRS 1915+105 have been analyzed in detail. We discover that unlike the previous findings, QPOs occasionally occur even…
Understanding Galactic Black Hole Candidate GRS 1915+105
Sandip K. Chakrabarti, S. G. Manickam, A. Nandi +1
We interpret observed features of the black hole candidate GRS1915+105 in the light of the advective flow paradigm. The light curve of this black hole is seen to be of four classes…
Spectral Signature of Wind Generation From The Post-Shock Region in GRS1915+105 Accretion Disk
Sandip K. Chakrabarti, Sivakumar G. Manickam, Anuj K. Nandi +1
Accretion and outflows are common in systems which include black holes. Especially important is the case of the well known micro-quasar GRS1915+105 in our own galaxy, where super-l…
Inhomogeneous Pairing in Highly Disordered s-wave Superconductors
Amit Ghosal, Mohit Randeria, Nandini Trivedi
We study a simple model of a two-dimensional s-wave superconductor in the presence of a random potential in the regime of large disorder. We first use the Bogoliubov-de Gennes (BdG…
The Dynamics of Efficiency: A Simple Model
S. N. Majumdar, P. L. Krapivsky
We propose a simple model that describes the dynamics of efficiencies of competing agents. Agents communicate leading to increase of efficiencies of underachievers, and an efficien…
Supergravity couplings to Noncommutative Branes, Open Wilson Lines and Generalised Star Products
S. R. Das, S. P. Trivedi
Noncommutative gauge theories can be constructed from ordinary gauge theories in lower dimensions. Using this construction we identify the operators on noncommutative D…
Distribution of sizes of erased loops of loop-erased random walks in two and three dimensions
Himanshu Agrawal, Deepak Dhar
We show that in the loop-erased random walk problem, the exponent characterizing probability distribution of areas of erased loops is superuniversal. In d-dimensions, the probabili…
Search for the Standard Model Higgs boson in e+e- collisions at root(s) up to 202GeV
L3 Collaboration
The Standard Model Higgs boson is searched for in 233.2 pb-1 of data collected by the L3 detector at centre of mass energies from 192 GeV to 202 GeV. These data are consistent with…
Search for Neutral Higgs Bosons of the Minimal Supersymmetric Standard Model in e+e- Interactions at root(s)=192-202GeV
L3 Collaboration
A search for the lightest neutral CP-even and the neutral CP-odd Higgs bosons of the Minimal Supersymmetric Standard Model is performed using 233.2 pb-1 of integrated luminosity co…
Electron and Neutron Electric Dipole Moments in the Focus Point Scenario of SUGRA Model
Utpal Chattopadhyay, Tarek Ibrahim, D. P. Roy
We estimate the electron and neutron electric dipole moments in the focus point scenario of the minimal SUGRA model corresponding to large sfermion masses and moderate to large $\t…
Toward a Midisuperspace Quantization of LeMaitre-Tolman-Bondi Collapse Models
Cenalo Vaz, Louis Witten, T. P. Singh
LeMa\^ıtre-Tolman-Bondi models of spherical dust collapse have been used and continue to be used extensively to study various stellar collapse scenarios. It is by now well-known th…
Experimental implications of quantum phase fluctuations in layered superconductors
Arun Paramekanti
I study the effect of quantum and thermal phase fluctuations on the in-plane and c-axis superfluid stiffness of layered d-wave superconductors. First, I show that quantum phase flu…
Inner Disk Oscillations and QPOs in Relativistic Jet Sources
A. R. Rao
Recent results on the inner disk oscillations found in GRS 1915+105 are reviewed. QPOs during the low state are used as a marker for such oscillations and the physical picture emer…
Implications of 21cm observations for damped Ly- systems
Jayaram N Chengalur, Nissim Kanekar
We present Giant Metrewave Radio Telescope HI 21cm absorption observations, of candidate and confirmed damped Lyman- systems (DLAS). The derived spin temperatures (T_s) are in a…
Matrix Model, Noncommutative Gauge Theory and the Tachyon Potential
Gautam Mandal, Spenta R. Wadia
The D2brane-anti-D2brane system is described in the framework of BFSS Matrix model and noncommutative (NC) gauge theory. The physical spectrum of fields is found by appropriate gau…
Stable Non-BPS States and Their Holographic Duals
Sunil Mukhi, Nemani V. Suryanarayana
Stable non-BPS states can be constructed and studied in a variety of contexts in string theory. Here we review some interesting constructions that arise from suspended and wrapped…
A Quasi-Model-Independent Search for New High p_T Physics at DZero
DZero Collaboration
We apply a quasi-model-independent strategy ("Sleuth") to search for new high p_T physics in approximately 100 pb^-1 of ppbar collisions at sqrt(s) = 1.8 TeV collected by the DZero…
Measurements of the Cross Sections for Open Charm and Beauty Production in gamma gamma Collisions at root(s)=189-202 GeV
L3 Collaboration
The production of c and b quarks in gamma-gamma collisions is studied with the L3 detector at LEP with 410 pb^-1 of data, collected at centre-of-mass energies from 189 GeV to 202 G…
Search for Excited Leptons in e+ e- Interactions at sqrt(s)=192 - 202 GeV
L3 Collaboration
Excited leptons are searched for using the L3 detector at LEP. The data collected at centre-of-mass energies in the range from 192 up to 202 GeV correspond to a total luminosity of…
Higgs Candidates in e+e- Interactions at root(s) = 206.6 GeV
L3 Collaboration
In a search for the Standard Model Higgs boson, carried out on 212.5 pb-1 of data collected by the L3 detector at the highest LEP centre-of-mass energies, including 116.5 pb-1 abov…
A Quasi-Model-Independent Search for New Physics at Large Transverse Momentum
DZero Collaboration
We apply a quasi-model-independent strategy ("Sleuth") to search for new high p_T physics in approximately 100 pb^-1 of ppbar collisions at sqrt(s) = 1.8 TeV collected by the DZero…
Peak effect in laser ablated DyBa2Cu3O7-d films at microwave frequencies at subcritical currents
A. R. Bhangale, P. Raychaudhuri, T. Banerjee +2
In this paper we report the observation of a peak in the microwave surface resistance (at frequencies ~10GHz) of laser ablated DyBa2Cu3O7-d films in magnetic field ranging from 2 t…
K0s K0s Final State in Two-Photon Collisions and Implications for Glueballs
L3 Collaboration
The K0s K0s final state in two-photon collisions is studied with the L3 detector at LEP. The mass spectrum is dominated by the formation of the f_2'(1525) tensor meson in the helic…