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33 papers · 1 filter
Signatures of an invisibly decaying Higgs particles at LHC
Debajyoti Choudhury, D. P. Roy
The Higgs particle can decay dominantly into an invisible channel in the Majoron models. We have explored the prospect of detecting such a Higgs particle at LHC via its associated…
Topological Landau-Ginzburg Model of Two-Dimensional String Theory
Debashis Ghoshal, Sunil Mukhi
We study a topological Landau-Ginzburg model with superpotential W(X)=X^{-1}. This is argued to be equivalent to c=1 string theory compactified at the self-dual radius. We compute…
Heavy Charged Higgs Signals at the LHC
V. Barger, R. J. N. Phillip, D. P. Roy
We discuss the viability of charged-Higgs signals at the proposed LHC supercollider, in the decay channel . Here one top qua…
The Quasi-Linear Evolution of the Density Field in Models of Gravitational Instability
F. Bernardeau, T. P. Singh, B. Banerjee +1
Two quasi-linear approximations, the frozen flow approximation (FFA) and the frozen potential approximation (FPA), have been proposed recently for studying the evolution of a colli…
Interface Tensions and Perfect Wetting in the Two-Dimensional Seven-State Potts Model
B. Grossmann, Sourendu Gupta
We present a numerical determination of the order-disorder interface tension, \sod, for the two-dimensional seven-state Potts model. We find $\sod=0.0114\pm0.0012$, in good agreeme…
Effects of Possible Transitions in Neutral Meson Decays}
G. V. Dass, K. V. L. Sarma
We explore the possibility that the existing data on like-sign dileptons at the resonance consist of events arising from mixing and also from $ΔB =…
Like Sign Dilepton Signature for Gluino Production at LHC with or without R Conservation
H. Dreiner, Manoranjan Guchait, D. P. Roy
The isolated like sign dilepton signature for gluino production is investigated at the LHC energy for the conserving as well as the and violating SUSY models over a wid…
Supercooling and Nucleation in Phase Transitions of the Early Universe -
B. Banerjee, R. V. Gavai
The three phase transitions - the GUT, the electro-weak and the quark-hadron, which the universe is assumed to have undergone produce very important physical effects if they are as…
Glueball-Like Screening Masses in Pure SU(3) at Finite Temperatures
B. Grossman, Sourendu Gupta, U. M. Heller +1
We investigate the finite-temperature excitation spectrum in the gluon sector of pure gauge theory through measurements of screening masses in correlations of loop operator…
Correlation Functions and Multicritical Flows in String Theory
Suresh Govindarajan, T. Jayaraman, Varghese John
We compute all string tree level correlation functions of vertex operators in string theory. This is done by using the ring structure of the theory. In order to study the mul…
coherent states and path-integral derivation of bosonization of non-relativistic fermions in one dimension
Avinash Dhar, Gautam Mandal, Spenta R. Wadia
We complete the proof of bosonization of noninteracting nonrelativistic fermions in one space dimension by deriving the bosonized action using coherent states in the fer…
A Note on Gauge Transformations in Batalin-Vilkovisky Theory
Ashoke Sen, Barton Zwiebach
We give a generally covariant description, in the sense of symplectic geometry, of gauge transformations in Batalin-Vilkovisky quantization. Gauge transformations exist not only at…
A family of étale coverings of the affine line
Kirti Joshi
In the note we construct a family of étale coverings of the affine line. More specifically, let be a finite field of characteristic and suppose that the cardinality of …
Perturbation of the Ground Varieties of C = 1 String Theory
Debashis Ghoshal, Porus Lakdawala, Sunil Mukhi
We discuss the effect of perturbations on the ground rings of string theory at the various compactification radii defining the points of the moduli space. We argue that…
Quantum Gravity and Non-unitarity in Black Hole Evaporation
Claus Kiefer, Rainer Mueller, Tejinder P. Singh
We discuss the relevance of quantum gravitational corrections to the functional Schrödinger equation for the information loss paradox in black hole evaporation. These corrections a…
Sizing up the Nuclear Glue in -production
R. V. Gavai, R. M. Godbole
Nuclear gluon densities are of great importance to the physics of relativistic heavy ion collisions, in particular, in assessing the origin of -suppression. We describe our at…
Two-Dimensional Black Hole and Nonperturbative String Theory
Avinash Dhar
We discuss the interpertation of the matrix model as two-dimensional string theory in a dilaton-black hole background. The nonperturbative formulation of matrix model i…
A Proof of Local Background Independence of Classical Closed String Field Theory
Ashoke Sen, Barton Zwiebach
We give a complete proof of local background independence of the classical master action for closed strings by constructing explicitly, for any two nearby conformal theories in a C…
Can a Logarithmically Running Coupling Mimic a String Tension?
M. Grady
It is shown that a Coulomb potential using a running coupling slightly modified from the perturbative form can produce an interquark potential that appears nearly linear over a lar…
Duality Symmetries of 4D Heterotic Strings
John H. Schwarz, Ashoke Sen
Target space duality (T duality), which interchanges Kaluza--Klein and winding-mode excitations of the compactified heterotic string, is realized as a symmetry of a world-sheet act…
An Effective Cutoff for the Isolalated Lepton Background from Bottom Decay --
N. K. Mondal, D. P. Roy
There is a strong correlation between the and isolation of the lepton coming from decay. Consequently the isolated lepton background from decay goes down rapidly with…
Collective Dipole Oscillations in Atomic Nuclei and Small Metal Particles
R. S. Bhalerao, M. Barma
(The systematics of photon absorption cross sections in nuclei and small metal particles are examined as a function of the number of constituent fermions . It is pointed out tha…
Decay-Time Asymmetries at the B-Factories
K. V. L. Sarma
Absract (Invited talk at the X DAE High Energy Physics symposium in December 1992, held at Tata Institute of Fundamental Research, Bombay)
Wave Propagation in Stringy Black Hole
Avinash Dhar, Gautam Mandal, Spenta R. Wadia
We further study the nonperturbative formulation of two-dimensional black holes. We find a nonlinear differential equation satisfied by the tachyon in the black hole background. We…