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- University of SplitHR1.6k papers
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- Panjab UniversityIN1.6k papers
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49 papers · 1 filter
Structure of ^{19}C from Coulomb dissociation studies
P. Banerjee, R. Shyam
We investigate the structure of the neutron rich nucleus ^{19}C through studies of its breakup in the Coulomb field of target nuclei. The breakup amplitude is calculated within an…
Nuclear symmetry energy in presence of hyperons in the nonrelativistic Thomas-Fermi approximation
Sarmistha Banik, Debades Bandyopadhyay
We generalise the finite range momentum and density dependent Seyler-Blanchard nucleon-nucleon effective interaction to the case of interaction between two baryons. This effective…
Compactification near and on the light front
A. Harindranath, L. Martinovic, J. P. Vary
We address problems associated with compactification near and on the light front. In perturbative scalar field theory we illustrate and clarify the relationships among three approa…
Impurity Substitution in Bismuth and Thallium Cuprates: Suppression of T_c and Estimation of Pseudogap
Biplab Chattopadhyay, B. Bandyopadhyay, Asok Poddar +3
Suppression of T_c in bilayer bismuth and thallium cuprates, by substitution of Co impurities at Cu sites, are taken for examination. T_c suppression data on differently doped Bi22…
Inverse beta-decay in magnetic fields
Kaushik Bhattacharya, Palash B. Pal
We calculate the cross section of the inverse beta decay process, , in a magnetic field which is much smaller than . Using exact solutions of the Dirac equat…
Chiral Gauge Theory on Lattice with Domain Wall Fermions
S. Basak, Asit K. De
We investigate a U(1) lattice chiral gauge theory with domain wall fermions and compact gauge fixing. In the reduced model limit, our perturbative and numerical investigations show…
R-parity Violating Radiative Photino Decay in Supersymmetric Models
Ambar Ghosal
It has been shown that unless the tri-linear R-parity violating coupling (i = 1, 2) is small enough ( for MSSM and for GMSB model),the p…
Breakup of B and the Be(B reaction
R. Shyam, I. J. Thompson
The calculated rate of events in some of the existing solar neutrino detectors is directly proportional to the rate of the Be(B reaction measured in the laboratory at l…
Selected Topics in Light Front Field Theory and Applications to the High Energy Phenomena
Rajen Kundu
In this thesis, we have presented some of the aspects of light-front (LF) field theory through their successful application in the Deep Inelastic Scattering (DIS). We have develope…
Complete Set of Splitting Functions Relevant in the Evolution of Nucleonic Helicity Distributions
Rajen Kundu
In this work, we show how the complete set of splitting functions relevant for the evolution of various distribution functions describing nucleonic helicity structure can be obtain…
Electron Capture Rates of Mid-fp Shell Nuclei for Supernova and Stellar Evolution
S. Chakravarti, K. Kar, A. Ray +1
A detailed model is constructed for the calculation of electron capture rates of some fp-shell nuclei for situations prevailing in pre-supernova and collapse phases of the evolutio…
A Numerical Experiment in DLCQ: Microcausality, Continuum Limit and all that
Dipankar Chakrabarti, Asmita Mukherjee, Rajen Kundu +1
Issues related with microcausality violation and continuum limit in the context of (1+1) dimensional scalar field theory in discretized light-cone quantization (DLCQ) are addressed…
Phase diagram of an exactly solvable t-J ladder model
Holger Frahm, Anjan Kundu
We study a system of one-dimensional t-J models coupled to a ladder system. A special choice of the interaction between neighbouring rungs leads to an integrable model with supersy…
Algebraic construction of quantum integrable models including inhomogeneous models
Anjan Kundu
Exploiting the quantum integrability condition we construct an ancestor model associated with a new underlying quadratic algebra. This ancestor model represents an exactly integrab…
Fermion decoupling and the Axial Anomaly on the Lattice
H. Banerjee, Asit K. De
In the axial Ward identity of lattice QED we show that in the limit of infinite fermion mass m the pseudoscalar density term exactly cancels the Adler-Bell-Jackiw anomaly. Using th…
U(1) Chiral Gauge Theory with Domain Wall Fermions and Gauge Fixing
S. Basak, Asit K. De
We investigate a U(1) lattice chiral gauge theory with the waveguide formulation of the domain wall fermions and with compact gauge fixing. In the reduced model limit, there seems…
Thermal Photons and Lepton Pairs from Quark Gluon Plasma and Hot Hadronic Matter
Jan-e Alam, Sourav Sarkar, Pradip Roy +2
The formulation of the real and virtual photon production rate from strongly interacting matter is presented in the framework of finite temperature field theory. The changes in the…
Neutrino mass and magnetic moment in supersymmetry without R-parity in the light of recent data
Gautam Bhattacharyya, H. V. Klapdor-Kleingrothaus, Heinrich Päs
We consider the generation of neutrino Majorana mass and transition magnetic moment by the lepton-number violating and/or couplings in R-parity-violating supersymmetric mo…
Imaginary deuteron optical potential due to elastic and inelastic breakup
A. Ingemarsson, R. Shyam
The contributions to the reaction cross section from the elastic and inelastic breakup processes, calculated within the post-form distorted wave Born-approximation theory, are used…
A note on the entropy of charged multi - black - holes
P. Mitra
Majumdar--Papapetrou multi--black-hole solutions of the Einstein--Maxwell equations are considered in four and higher dimensions. The Euclidean action with boundary conditions appr…
Transverse Spin in QCD and Transverse Polarized Deep Inelastic Scattering
A. Harindranath, Asmita Mukherjee, Raghunath Ratabole
We address the long standing problem of the construction of relativistic spin operators for a composite system in QCD. Exploiting the kinematical boost symmetry in light front theo…
Comparison of perturbative expansions using different phonon bases for two-site Holstein model
Jayita Chatterjee, A. N. Das
The two-site single-polaron problem is studied within the perturbative expansions using different standard phonon basis obtained through the Lang Firsov (LF), modified LF (MLF) and…
Cosmological QCD Phase Transition and Dark Matter
Abhijit Bhattacharyya, Jan-e Alam, Sourav Sarkar +4
We calculate the size distribution of quark nuggets, which could be formed due to first order QCD phase transition in the early universe. We find that there are a large number of s…
Faraday effect : a field theoretical point of view
Avijit K. Ganguly, Sushan Konar, Palash B. Pal
We analyze the structure of the vacuum polarization tensor in the presence of a background electromagnetic field in a medium. We use various discrete symmetries and crossing symmet…