321 citations · 1.1k across the 51 of their papers we have counts for
24 papers · 1 filter
Dynamics of () Domain Walls in SU(N) Gauge Theories
Sayanjit Banerjee, Sanatan Digal, Sumit Shaw
We study collisions of domain walls in gauge theories using the Polyakov-loop effective potential models. We find that string junctions play a crucial role in the dynamics…
Doppler shifted Hawking radiation from acoustic black holes in ultra-relativistic heavy-ion collisions
Sanatan Digal, Ajit M. Srivastava
In a hydrodynamic flow, with flow becoming supersonic at some point, the subsonic-supersonic boundary behaves as the horizon of a black hole. Possibility of detecting Hawking radia…
Parametric resonance in abelian and non-abelian gauge fields via space-time oscillations
Shreyansh S. Dave, Sanatan Digal, Vinod Mamale
We study the evolution of abelian electromagnetic as well as non-abelian gauge fields, in the presence of space-time oscillations. Analysis of the time evolution of…
Effect of fluctuations on the Geodesic rule for topological defect formation
Sanatan Digal, Vinod Mamale
At finite temperature, the field along a linear stretch of correlation length size is supposed to trace the shortest path in the field space given the two end point values, known a…
meta-stable states in PNJL model
Minati Biswal, Sanatan Digal, P. S. Saumia
We study the Z 3 meta-stable states in the Polyakov loop Nambu-Jona-Lasinio (PNJL) model. These states exist for temperatures above T m ~ 194 MeV and can decay via bubble nucleatio…
Charmonium Production and Corona Effect
S. Digal, H. Satz, R. Vogt
We study the centrality dependence to be expected if only charmonium production in the corona survives in high energy nuclear collisions, with full suppression in the hot, deconfin…
Semi-superfluid strings in High Density QCD
A. P. Balachandran, S. Digal, T. Matsuura
We show that topological superfluid strings/vortices with flux tubes exist in the color-flavor locked (CFL) phase of color superconductors. Using a Ginzburg-Landau free energy we f…
Predictions for J/Psi Suppression by Parton Percolation
S. Digal, S. Fortunato, H. Satz
Parton percolation provides geometric deconfinement in the pre-equilibrium stage of nuclear collisions. The resulting parton condensate can lead to charmonium suppression. We formu…
Parton Percolation and J/Psi Suppression
S. Digal, S. Fortunato, P. Petreczky +1
The geometric clustering of partons in the transverse plane of nuclear collisions leads for increasing A or sqrt(s) to percolation. In the resulting condensate, the partons are dec…
Non-abelian Topological Strings and Metastable States in Linear Sigma Model
A. P. Balachandran, S. Digal
Non-abelian (NA) topological string defects exist in QCD with the spontaneous chiral symmetry breaking . Anomaly effects lead to domain walls…
Sequential Quarkonium Suppression
S. Digal, P. Petreczky, H. Satz
We use recent lattice data on the heavy quark potential in order to determine the dissociation temperatures of different quarkonium states in hot strongly interacting matter. Our a…
Topological String Defect Formation During the Chiral Phase Transition
A. P. Balachandran, S. Digal
We extend and generalize the seminal work of Brandenberger, Huang and Zhang on the formation of strings during chiral phase transitions(berger) and discuss the formation of abelian…
Quarkonium Feed-Down and Sequential Suppression
S. Digal, P. Petreczky, H. Satz
About 40-50 % of the quarkonium ground states J/psi(1S) and Upsilon(1S) produced in hadronic collisions originate from the decay of higher excitations. In a hot medium, these highe…
String Breaking and Quarkonium Dissociation at Finite Temperatures
S. Digal, P. Petreczky, H. Satz
Recent lattice studies of string breaking in QCD with dynamical quarks determine the in-medium temperature dependence of the heavy quark potential. Comparing this to the binding en…
Deconfinement through Chiral Symmetry Restoration in Two-Flavour QCD
S. Digal, E. Laermann, H. Satz
We propose that in QCD with dynamical quarks, colour deconfinement occurs when an external field induced by the chiral condensate strongly aligns the Polyakov loop. This effect set…
Resonant Production of Topological Defects
Sanatan Digal, Rajarshi Ray, Supratim Sengupta +1
We describe a novel phenomenon in which vortices are produced due to resonant oscillations of a scalar field which is driven by a periodically varying temperature T, with T remaini…
Observing Correlated Production of Defects-Antidefects in Liquid Crystals
Sanatan Digal, Rajarshi Ray, Ajit M. Srivastava
We present observations of strength one defects and antidefects formed in isotropic-nematic phase transition in a thin layer of nematic liquid crystals, using a cross-polarizer set…
Forming a Single, Large, DCC Domain in a Heavy-Ion Collision
S. Digal, R. Ray, S. Sengupta +1
We demonstrate the possibility of forming a single, large domain of disoriented chiral condensate (DCC) in a heavy-ion collision. In our scenario, rapid initial heating of the part…
Thermal Fluctuations of Domains of Disoriented Chiral Condensates
Sanatan Digal, Ajit M. Srivastava
We argue that disoriented chiral condensate (DCC) domains are not well defined for temperatures above the Ginzburg temperature (). Above , the dynamics o…
Surface Induced Phase Transition in Quark-Gluon Plasma Produced in Laboratory
Sanatan Digal, Ajit M. Srivastava
We discuss an outside-inside scenario for a first order quark-hadron transition in the Quark-Gluon Plasma (QGP) expected to be produced in heavy ion collisions, wherein the entire…
Simulation of Vortex-Antivortex Pair Production in a Phase Transition with Explicit Symettry Breaking
Sanatan Digal, Supratim Sengupta, Ajit M. Srivastava
We carry out numerical simulation of the formation of U(1) global vortices in a first order phase transition in 2+1 dimensions in the presence of small explicit symmetry breaking.…
Vortex-Antivortex Pair Production in a First Order Phase Transition
Sanatan Digal, Supratim Sengupta, Ajit M. Srivastava
We carry out numerical simulation of a first order phase transition in 2+1 dimensions by randomly nucleating bubbles, and study the formation of global U(1) vortices. Bubbles grow…
Defect-Antidefect pair production via field oscillations
Sanatan Digal, Supratim Sengupta, Ajit M. Srivastava
We show that the mechanism of vortex-antivortex pair production via field oscillations, earlier proposed by two of us for systems with first order transitions in presence of explic…
Formation of Topological Defects with Explicit Symmetry Breaking
Sanatan Digal, Ajit M. Srivastava
We demonstrate a novel mechanism for the formation of topological defects in a first order phase transition for theories in the presence of small explicit symmetry breaking terms.…