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40 papers · 1 filter
Like-sign dilepton signature for gluino production at LHC including top quark and higgs boson effects
Manoranjan Guchait, D. P. Roy
A systematic analysis of the like-sign dipleton signature for gluino production at LHC is performed in the -conserving minimal supersymmetric standard model, taking into account…
Breakdown of Simple Scaling in Abelian Sandpile Models in One Dimension
Agha Afsar Ali, Deepak Dhar
We study the abelian sandpile model on decorated one dimensional chains. We determine the structure and the asymptotic form of distribution of avalanche-sizes in these models, and…
Upper Bound on the Mass of Lightest Higgs Boson in the Supersymmetric Majoran Model
P. N. Pandita
We calculate an upper bound on the lightest Higgs boson mass in the supersymmetric singlet majoran model containing SU(2) X U(1) singlet right handed neutrino fields and a chiral s…
Black Hole Solutions in Heterotic String Theory on a Torus
Ashoke Sen
We construct the general electrically charged, rotating black hole solution in the heterotic string theory compactified on a six dimensional torus and study its classical propertie…
Higher dimensional uniformisation and W-geometry
Suresh Govindarajan
We formulate the uniformisation problem underlying the geometry of W_n-gravity using the differential equation approach to W-algebras. We construct W_n-space (analogous to superspa…
Observing Virtual LSPs at LEP II
Amitava Datta, Aseshkrishna Datta, Sreerup Raychaudhuri
In the minimal supersymmetric extension of the Standard Model (MSSM) with -parity conservation the possibility that the sneutrino and the second lightest neutralino decay domina…
Massive particle creation in a static 1+1 dimensional spacetime
D. J. Lamb, A. Z. Capri, S. M. Roy
We show explicitly that there is particle creation in a static spacetime. This is done by studying the field in a coordinate system based on a physical principle which has recently…
Physics Prospects at the Hadron Colliders
D. P. Roy
I start with a brief introduction to the elementary particles and their interactions, Higgs mechanism and supersymmetry. The major physics objectives of the Tevatron and LHC collid…
Photon Structure Functions: Target Photon Mass Effects and QCD Corrections
Prakash Mathews, V. Ravindran
We present a systematic analysis of the processes to study the polarised and unpolarised photon structure functions. The effect of target photon m…
Haldane Exclusion Statistics and the Boltzmann Equation
R. K. Bhaduri, R. S. Bhalerao, M. V. N. Murthy
We generalize the collision term in the one-dimensional Boltzmann-Nordheim transport equation for quasiparticles that obey the Haldane exclusion statistics. For the equilibrium sit…
Causal quantum mechanics treating position and momentum symmetrically
S. M. Roy, V. Singh
De Broglie and Bohm formulated a causal quantum mechanics with a phase space density whose integral over momentum reproduces the position probability density of usual statistical q…
Leading Large N Modification of QCD_2 on a Cylinder by Dynamical Fermions
Avinash Dhar, Gautam Mandal, Spenta R. Wadia
We consider 2-dimensional QCD on a cylinder, where space is a circle. We find the ground state of the system in case of massless quarks in a expansion. We find that coupling…
Universality and the Deconfinement Phase Transition in SU(2) Lattice Gauge Theory
Manu Mathur, Rajiv V. Gavai
We study the three dimensional fundamental-adjoint lattice gauge theory at non-zero temperatures by Monte Carlo simulations. On an lattice, at , w…
Topological 2D String Theory: Higher-genus Amplitudes and W-infinity Identities
Debashis Ghoshal, Camillo Imbimbo, Sunil Mukhi
We investigate Landau-Ginzburg string theory with the singular superpotential X^{-1} on arbitrary Riemann surfaces. This theory, which is a topological version of the c=1 string at…
The Final Fate of Spherical Inhomogeneous Dust Collapse
T. P. Singh, P. S. Joshi
We examine the role of the initial density and velocity distribution in the gravitational collapse of a spherical inhomogeneous dust cloud. Such a collapse is described by the Tolm…
Universal Cellular Automata and Class 4
Avinash Dhar, Porus Lakdawala, Gautam Mandal +1
Wolfram has provided a qualitative classification of cellular automata(CA) rules according to which, there exits a class of CA rules (called Class 4) which exhibit complex pattern…
A possible resolution of the CDF psi^prime anomaly
D. P. Roy, K. Sridhar
We consider the contribution of radially excited 2^3P_{1,2} states to psi^prime production at the Tevatron energy. Production of these states via the conventional gluon fusion mech…
Slow Relaxation in a Model with Many Conservation Laws : Deposition and Evaporation of Trimers on a Line
Mustansir Barma, Deepak Dhar
We study the slow decay of the steady-state autocorrelation function in a stochastic model of deposition and evaporation of trimers on a line with infinitely many conservati…
Background Independent Algebraic Structures in Closed String Field Theory
Ashoke Sen, Barton Zwiebach
We construct a Batalin-Vilkovisky (BV) algebra on moduli spaces of Riemann surfaces. This algebra is background independent in that it makes no reference to a state space of a conf…
Algebraic Aspects of Abelian Sandpile Models
D. Dhar, P. Ruelle, S. Sen +1
The abelian sandpile models feature a finite abelian group generated by the operators corresponding to particle addition at various sites. We study the canonical decomposition…
Algebraic Aspects of Abelian Sandpile Models
D. Dhar, P. Ruelle, S. Sen +1
The abelian sandpile models feature a finite abelian group G generated by the operators corresponding to particle addition at various sites. We study the canonical decomposition of…
Strong-Weak Coupling Duality in Three Dimensional String Theory
Ashoke Sen
Following an old result of Marcus and Schwarz we argue that in the heterotic string theory compactified on a seven dimensional torus, the target space duality group O(7,23;Z) and t…
O(d,d;R) Deformations of Complex Structures and Extended Worldsheet Supersymmetry
S. F. Hassan
It is shown that the O(d,d;R) deformations of the superstring vacua and the O(d,d+16;R) deformations of the heterotic string vacua preserve extended worldsheet supersymmetry and, h…
Recent Results in Neutrino Physics
K. V. L. Sarma
This is a survey of the current experimental information on some of the interesting issues in neutrino physics: neutrino species, neutrino masses, neutrino magnetic moments, solar…