Deeptak Biswas

@niser.ac.in

School Of Physical Sciences
National Institute of Science Education and Research

Deeptak Biswas


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https://researchid.co/deeptakb

RESEARCH, TEACHING, or OTHER INTERESTS

Physics and Astronomy
15

Scopus Publications

168

Scholar Citations

8

Scholar h-index

5

Scholar i10-index

Scopus Publications

  • Vector interaction bounds in NJL-like models from LQCD estimated curvature of the chiral crossover line
    Mahammad Sabir Ali, Deeptak Biswas, Chowdhury Aminul Islam
    European Physical Journal A, 2025
  • Dynamics of hot QCD matter 2024 - Bulk properties
    Prabhakar Palni, Amal Sarkar, Santosh K. Das, Anuraag Rathore, Syed Shoaib, Arvind Khuntia, Amaresh Jaiswal, Victor Roy, Ankit Kumar Panda, Partha Bagchi, Hiranmaya Mishra, Deeptak Biswas, Peter Petreczky, Sayantan Sharma, Kshitish Kumar Pradhan, Ronald Scaria, Dushmanta Sahu, Raghunath Sahoo, Arpan Das, Ranjita K. Mohapatra, Jajati K. Nayak, Rupa Chatterjee, Munshi G. Mustafa, K. R. Aswathy Menon, Suraj Prasad, Neelkamal Mallick, Pushpa Panday, Binoy Krishna Patra, Paramita Deb, Raghava Varma, Ashutosh Dwibedi, Thandar Zaw Win, Subhalaxmi Nayak, Cho Win Aung, Sabyasachi Ghosh, Sesha Vempati, Sunny Kumar Singh, Manu Kurian, Vinod Chandra, Soham Banerjee, Sumit, Rohit Kumar, Rajkumar Mondal, Nilanjan Chaudhuri, Pradip Roy, Sourav Sarkar, Lokesh Kumar, authors
    International Journal of Modern Physics E, 2025
    The second Hot QCD Matter 2024 conference at IIT Mandi focused on various ongoing topics in high-energy heavy-ion collisions, encompassing theoretical and experimental perspectives. This proceedings volume includes 19 contributions that collectively explore diverse aspects of the bulk properties of hot QCD matter. The topics encompass the dynamics of electromagnetic fields, transport properties, hadronic matter, spin hydrodynamics, and the role of conserved charges in high-energy environments. These studies significantly enhance our understanding of the complex dynamics of hot QCD matter, the quark–gluon plasma (QGP) formed in high-energy nuclear collisions. Advances in theoretical frameworks, including hydrodynamics, spin dynamics and fluctuation studies, aim to improve theoretical calculations and refine our knowledge of the thermodynamic properties of strongly interacting matter. Experimental efforts, such as those conducted by the ALICE and STAR collaborations, play a vital role in validating these theoretical predictions and deepening our insight into the QCD phase diagram, collectivity in small systems, and the early-stage behavior of strongly interacting matter. Combining theoretical models with experimental observations offers a comprehensive understanding of the extreme conditions encountered in relativistic heavy-ion and proton-proton collisions.
  • Hadron momentum spectra from analytical solutions of relativistic hydrodynamics
    Mahammad Sabir Ali, Deeptak Biswas, Amaresh Jaiswal, Sushant K. Singh
    European Physical Journal C, 2025
    We present analytical solution of relativistic hydrodynamics for a system having cylindrical symmetry with boost-invariant longitudinal expansion and Hubble-like transverse expansion. We also consider analytical solution for Hubble-like spherically expanding system. For these two cases, we calculate analytical expression for transverse momentum spectra of hadrons, at constant temperature freeze-out hypersurface using Cooper–Frye prescription. We compare our results for transverse momentum spectra with experimental results from Large Hadron Collider and CERN SPS where one expects cylindrical and spherical geometry of the fireball, respectively. In the case of low-energy collisions with spherical geometry, we calculate rapidity spectra and compare with the results from CERN SPS.
  • Effects of strangeness on the chiral pseudocritical line
    Mahammad Sabir Ali, Deeptak Biswas, Amaresh Jaiswal, Hiranmaya Mishra
    Physical Review D, 2024
    Within a $2+1$ flavor Nambu--Jona-Lasinio model, we calculate the curvature coefficients and check them against available lattice QCD estimations. With the observation that the flavor mixing due to the `t Hooft determinant term significantly affects the ${\ensuremath{\kappa}}_{2}^{S}$, we explore the effect of ${\ensuremath{\mu}}_{S}$ on the $T\ensuremath{-}{\ensuremath{\mu}}_{B}$ crossover lines. With the novel determination of negative ${\ensuremath{\kappa}}_{2}^{B}$ at large ${\ensuremath{\mu}}_{S}$, we advocate the importance of studying the same in lattice QCD.
  • Chiral condensate and the equation of state at nonzero baryon density from the hadron resonance gas model with a repulsive mean field
    Deeptak Biswas, Peter Petreczky, Sayantan Sharma
    Physical Review C, 2024
    We study the QCD equation of state and the chiral condensate using the hadron resonance gas model with repulsive mean-field interactions. We find that the repulsive interactions improve the agreement with the lattice results on the derivatives of the pressure with respect to the baryon chemical potential up to eighth order. From the temperature dependence of the chiral condensate we estimate the crossover temperature as a function of baryon chemical potential, Tpc(μB). We find that the chiral crossover line starts to deviate significantly from the chemical freeze-out line already for μB>400MeV. Furthermore, we find that the chiral pseudocritical line can be parametrized as Tpc(μB)/Tpc(0)=1−κ2[μB/Tpc(0)]2−κ4[μB/Tpc(0)]4 with κ2=0.0150(2) and κ4=3.1(6)×10−5, which are in agreement with lattice QCD results for small values of μB. For the first time we find a tiny but nonzero value of κ4 in our study. Published by the American Physical Society 2024
  • Cumulants of net-strangeness multiplicity distributions at energies available at the BNL Relativistic Heavy Ion Collider
    Changfeng Li, Deeptak Biswas, Nihar Ranjan Sahoo
    Physical Review C, 2023
    The higher-order cumulants of net-proton number, net-charge, and net-strangeness multiplicity distributions are widely studied to search for the quantum-chromodynamics critical point and extract the chemical freeze-out parameters in heavy-ion collisions. In this context, the event-by-event fluctuations of the net-strangeness multiplicity distributions play important roles in extracting the chemical freeze-out parameter in the strangeness sector. Due to having difficulties in detecting all strange hadrons event by event, the kaon $(K)$ and lambda $(\mathrm{\ensuremath{\Lambda}})$ particles serve as a proxy for the strangeness-related observables in heavy-ion collisions. We have studied the $\mathrm{net}\text{\ensuremath{-}}K$, $\mathrm{net}\text{\ensuremath{-}}\mathrm{\ensuremath{\Lambda}}$, and net-$(K+\mathrm{\ensuremath{\Lambda}})$ multiplicity distributions and calculated their different order of cumulants using the ultrarelativistic quantum molecular dynamics model and hadron resonance gas calculation. To adequately account for the net-strangeness cumulants, it has been found that the inclusion of resonance decay contributions in $K$ and $\mathrm{\ensuremath{\Lambda}}$ is necessary.
  • Chiral condensate from a hadron resonance gas model
    Deeptak Biswas, Peter Petreczky, Sayantan Sharma
    Physical Review C, 2022
    In this work we address the question of how well the chiral crossover transition can be understood in terms of a noninteracting hadron resonance gas model. Using the latest results on the variation of hadron masses as a function of the pion mass from lattice quantum chromodynamics, we study the temperature dependence of the renormalized chiral condensate in $2+1$ flavor QCD. Furthermore, we suggest a better criterion to estimate of the pseudocritical temperature, which gives ${T}_{c}=161.2\ifmmode\pm\else\textpm\fi{}1.7$ MeV, which is much improved compared to all the earlier results within the hadron resonance gas model or chiral perturbation theory. For the curvature of the pseudocritical line we find ${\ensuremath{\kappa}}_{2}=0.0203(7)$, which is in very good agreement with continuum extrapolated lattice results.
  • Aspects of chiral transition in a Hadron Resonance Gas model
    Deeptak Biswas, Peter Petrezcky, Sayantan Sharma
    15th Conference on Quark Confinement and the Hadron Spectrum Confinement 2022, 2022
    We study the chiral condensate for 2 + 1 flavor QCD with physical quarks within a non-interacting Hadron Resonance Gas (HRG) model. By including the latest information on the mass variation of the hadrons concerning the light quark mass, from lattice QCD and chiral perturbation theory, we show that it is possible to quite accurately account for the chiral crossover transition even within a conventional HRG model. We have calculated a pseudocritical temperature Tc=161.2±1.6 MeV and the curvature of crossover curve κ2=0.0203(7). These are in very good agreement with the latest continuum extrapolated results obtained from lattice QCD studies. We also discuss the limitations of extending such calculations toward the chiral limit. Furthermore, we study the effects of non-resonant hadron interactions within the HRG model and its consequences for the chiral transition in the regime of dense baryonic matter where lattice QCD results are not currently available.
  • Dynamics of QCD matter-current status
    Amaresh Jaiswal, Najmul Haque, Aman Abhishek, Raktim Abir, Aritra Bandyopadhyay, Khatiza Banu, Samapan Bhadury, Sumana Bhattacharyya, Trambak Bhattacharyya, Deeptak Biswas, H. C. Chandola, Vinod Chandra, Bhaswar Chatterjee, Chandrodoy Chattopadhyay, Nilanjan Chaudhuri, Aritra Das, Arpan Das, Santosh K. Das, Ashutosh Dash, Kishan Deka, Jayanta Dey, Ricardo L. S. Farias, Utsab Gangopadhyaya, Ritesh Ghosh, Sabyasachi Ghosh, Snigdha Ghosh, Ulrich Heinz, Sunil Jaiswal, Guruprasad Kadam, Pallavi Kalikotay, Bithika Karmakar, Gastão Krein, Avdhesh Kumar, Deepak Kumar, Lokesh Kumar, Manu Kurian, Soumitra Maity, Hiranmaya Mishra, Payal Mohanty, Ranjita K. Mohapatra, Arghya Mukherjee, Munshi G. Mustafa, Subrata Pal, H. C. Pandey, Mahfuzur Rahaman, Ralf Rapp, Deependra Singh Rawat, Sutanu Roy, Victor Roy, Kinkar Saha, Nihar R. Sahoo, Subhasis Samanta, Sourav Sarkar, Sarthak Satapathy, Fernando E. Serna, Mariyah Siddiqah, Pracheta Singha, V. Sreekanth, Sudipa Upadhaya, Nahid Vasim, Dinesh Yadav
    International Journal of Modern Physics E, 2021
    In this article, there are 18 sections discussing various current topics in the field of relativistic heavy-ion collisions and related phenomena, which will serve as a snapshot of the current state of the art. Section 1 reviews experimental results of some recent light-flavored particle production data from ALICE collaboration. Other sections are mostly theoretical in nature. Very strong but transient magnetic field created in relativistic heavy-ion collisions could have important observational consequences. This has generated a lot of theoretical activity in the last decade. Sections 2, 7, 9, 10 and 11 deal with the effects of the magnetic field on the properties of the QCD matter. More specifically, Sec. 2 discusses mass of [Formula: see text] in the linear sigma model coupled to quarks at zero temperature. In Sec. 7, one-loop calculation of the anisotropic pressure are discussed in the presence of strong magnetic field. In Sec. 9, chiral transition and chiral susceptibility in the NJL model is discussed for a chirally imbalanced plasma in the presence of magnetic field using a Wigner function approach. Sections 10 discusses electrical conductivity and Hall conductivity of hot and dense hadron gas within Boltzmann approach and Sec. 11 deals with electrical resistivity of quark matter in presence of magnetic field. There are several unanswered questions about the QCD phase diagram. Sections 3, 11 and 18 discuss various aspects of the QCD phase diagram and phase transitions. Recent years have witnessed interesting developments in foundational aspects of hydrodynamics and their application to heavy-ion collisions. Sections 12 and 15–17 of this article probe some aspects of this exciting field. In Sec. 12, analytical solutions of viscous Landau hydrodynamics in 1+1D are discussed. Section 15 deals with derivation of hydrodynamics from effective covariant kinetic theory. Sections 16 and 17 discuss hydrodynamics with spin and analytical hydrodynamic attractors, respectively. Transport coefficients together with their temperature- and density-dependence are essential inputs in hydrodynamical calculations. Sections 5, 8 and 14 deal with calculation/estimation of various transport coefficients (shear and bulk viscosity, thermal conductivity, relaxation times, etc.) of quark matter and hadronic matter. Sections 4, 6 and 13 deal with interesting new developments in the field. Section 4 discusses color dipole gluon distribution function at small transverse momentum in the form of a series of Bells polynomials. Section 6 discusses the properties of Higgs boson in the quark–gluon plasma using Higgs–quark interaction and calculate the Higgs decays into quark and anti-quark, which shows a dominant on-shell contribution in the bottom-quark channel. Section 13 discusses modification of coalescence model to incorporate viscous corrections and application of this model to study hadron production from a dissipative quark–gluon plasma.
  • Centrality Dependence of Chemical Freeze-Out Parameters and Strangeness Equilibration in RHIC and LHC Energies
    Deeptak Biswas
    Advances in High Energy Physics, 2021
    We have estimated centrality variation of chemical freeze-out parameters from yield data at midrapidity of π ± , K ± and p , p ¯ for collision energies of RHIC (Relativistic Heavy Ion Collider), Beam Energy Scan (RHIC-BES) program, and LHC (Large Hadron Collider). We have considered a simple hadron resonance gas model and employed a formalism involving conserved charges ( B , Q , S ) of QCD for parameterization. Along with temperature and three chemical potentials ( T , μ B , μ Q , μ S ), a strangeness undersaturation factor ( γ S ) has been used to incorporate the partial equilibration in the strange sector. Our obtained freeze-out temperature does not vary much with centrality, whereas chemical potentials and γ S seem to have a significant dependence. The strange hadrons are found to deviate from a complete chemical equilibrium at freeze-out at the peripheral collisions. This deviation appears to be more prominent as the collision energy decreases at lower RHIC-BES energies. We have also shown that this departure from equilibrium reduces towards central collisions, and strange particle equilibration may happen after a threshold number of participants in A - A collision.
  • Formation of light nuclei at chemical freezeout: Description within a statistical thermal model
    Deeptak Biswas
    Physical Review C, 2020
  • Viscosity, nonconformal equation of state, and sound velocity in Landau hydrodynamics
    Deeptak Biswas, Kishan Deka, Amaresh Jaiswal, Sutanu Roy
    Physical Review C, 2020
  • Systematics of chemical freeze-out parameters in heavy-ion collision experiments
    Sumana Bhattacharyya, Deeptak Biswas, Sanjay K. Ghosh, Rajarshi Ray, Pracheta Singha
    Physical Review D, 2020
  • Novel scheme for parametrizing the chemical freeze-out surface in heavy ion collision experiments
    Sumana Bhattacharyya, Deeptak Biswas, Sanjay K. Ghosh, Rajarshi Ray, Pracheta Singha
    Physical Review D, 2019
  • An experimental study of the swelling properties of spherical hydro-gel immersed in water and the formulation of a simple theoretical model for its explanation
    International Journal of Drug Delivery, 2012

RECENT SCHOLAR PUBLICATIONS

  • Effect of quark flavor coupling on chiral crossover line
    MS Ali, D Biswas, A Jaiswal, H Mishra
    Journal of Subatomic Particles and Cosmology, 100220 , 2025
    2025
  • Vector interaction bounds in NJL-like models from LQCD estimated curvature of the chiral crossover line
    MS Ali, D Biswas, CA Islam
    The European Physical Journal A 61 (10), 1-13 , 2025
    2025
    Citations: 2
  • Dynamics of hot QCD matter 2024—Bulk properties
    P Palni, A Sarkar, SK Das, A Rathore, S Shoaib, A Khuntia, A Jaiswal, ...
    International Journal of Modern Physics E 34 (07), 2544002 , 2025
    2025
    Citations: 9
  • Hadron momentum spectra from analytical solutions of relativistic hydrodynamics
    MS Ali, D Biswas, A Jaiswal, SK Singh
    The European Physical Journal C 85 (1), 30 , 2025
    2025
    Citations: 3
  • Effects of strangeness on the chiral pseudocritical line
    MS Ali, D Biswas, A Jaiswal, H Mishra
    Physical Review D 109 (11), 114017 , 2024
    2024
    Citations: 7
  • Chiral condensate and the equation of state at nonzero baryon density from the hadron resonance gas model with a repulsive mean field
    D Biswas, P Petreczky, S Sharma
    Physical Review C 109 (5), 055206 , 2024
    2024
    Citations: 8
  • Chemical freeze-out parametrization with mean field repulsive hadron resonance gas model
    SK Singh, N Sarkar, D Biswas
    arXiv preprint arXiv:2307.05930 , 2023
    2023
  • Cumulants of net-strangeness multiplicity distributions at energies available at the BNL Relativistic Heavy Ion Collider
    C Li, D Biswas, NR Sahoo
    Physical Review C 107 (6), 064905 , 2023
    2023
    Citations: 1
  • Chiral condensate from a hadron resonance gas model
    D Biswas, P Petreczky, S Sharma
    Physical Review C 106 (4), 045203 , 2022
    2022
    Citations: 9
  • Aspects of chiral transition in a Hadron Resonance Gas model
    D Biswas, P Petrezcky, S Sharma
    EPJ Web of Conferences 274, 05010 , 2022
    2022
  • Dynamics of QCD matter—current status
    A Jaiswal, N Haque, A Abhishek, R Abir, A Bandyopadhyay, K Banu, ...
    International Journal of Modern Physics E 30 (02), 2130001 , 2021
    2021
    Citations: 33
  • A thermal model study of the formation of nuclei and hypernuclei
    D Biswas
    Proceedings of the DAE Symp. on Nucl. Phys 65, 646 , 2021
    2021
  • Centrality Dependence of Chemical Freeze‐Out Parameters and Strangeness Equilibration in RHIC and LHC Energies
    D Biswas
    Advances in High Energy Physics 2021 (1), 6611394 , 2021
    2021
    Citations: 17
  • Formation of light nuclei at chemical freezeout: Description within a statistical thermal model
    D Biswas
    Physical Review C 102 (5), 054902 , 2020
    2020
    Citations: 8
  • Viscosity, nonconformal equation of state, and sound velocity in Landau hydrodynamics
    D Biswas, K Deka, A Jaiswal, S Roy
    Physical Review C 102 (1), 014912 , 2020
    2020
    Citations: 12
  • Analyzing COVID-19 pandemic with a new growth model for population ecology
    D Biswas, S Roy
    arXiv preprint arXiv:2004.12950 , 2020
    2020
    Citations: 6
  • Systematics of chemical freeze-out parameters in heavy-ion collision experiments
    S Bhattacharyya, D Biswas, SK Ghosh, R Ray, P Singha
    Physical Review D 101 (5), 054002 , 2020
    2020
    Citations: 27
  • A root finding method for parametrizing the chemical freeze-out surface in heavy-ion Collision Experiments
    D Biswas
    64th DAE BRNS Symposium on nuclear physics 64 (2020), 798-799 , 2020
    2020
  • Novel scheme for parametrizing the chemical freeze-out surface in Heavy Ion Collision Experiments
    S Bhattacharyya, D Biswas, SK Ghosh, R Ray, P Singha
    Physical Review D 100 (5), 054037 , 2019
    2019
    Citations: 17
  • An experimental study of the swelling properties of spherical hydro-gel immersed in water and the formulation of a simple theoretical model for its explanation
    P Das, D Biswas, S Roy, P Majumdar
    International Journal of Drug Delivery 4 (1), 20 , 2012
    2012
    Citations: 9

MOST CITED SCHOLAR PUBLICATIONS

  • Dynamics of QCD matter—current status
    A Jaiswal, N Haque, A Abhishek, R Abir, A Bandyopadhyay, K Banu, ...
    International Journal of Modern Physics E 30 (02), 2130001 , 2021
    2021
    Citations: 33
  • Systematics of chemical freeze-out parameters in heavy-ion collision experiments
    S Bhattacharyya, D Biswas, SK Ghosh, R Ray, P Singha
    Physical Review D 101 (5), 054002 , 2020
    2020
    Citations: 27
  • Centrality Dependence of Chemical Freeze‐Out Parameters and Strangeness Equilibration in RHIC and LHC Energies
    D Biswas
    Advances in High Energy Physics 2021 (1), 6611394 , 2021
    2021
    Citations: 17
  • Novel scheme for parametrizing the chemical freeze-out surface in Heavy Ion Collision Experiments
    S Bhattacharyya, D Biswas, SK Ghosh, R Ray, P Singha
    Physical Review D 100 (5), 054037 , 2019
    2019
    Citations: 17
  • Viscosity, nonconformal equation of state, and sound velocity in Landau hydrodynamics
    D Biswas, K Deka, A Jaiswal, S Roy
    Physical Review C 102 (1), 014912 , 2020
    2020
    Citations: 12
  • Dynamics of hot QCD matter 2024—Bulk properties
    P Palni, A Sarkar, SK Das, A Rathore, S Shoaib, A Khuntia, A Jaiswal, ...
    International Journal of Modern Physics E 34 (07), 2544002 , 2025
    2025
    Citations: 9
  • Chiral condensate from a hadron resonance gas model
    D Biswas, P Petreczky, S Sharma
    Physical Review C 106 (4), 045203 , 2022
    2022
    Citations: 9
  • An experimental study of the swelling properties of spherical hydro-gel immersed in water and the formulation of a simple theoretical model for its explanation
    P Das, D Biswas, S Roy, P Majumdar
    International Journal of Drug Delivery 4 (1), 20 , 2012
    2012
    Citations: 9
  • Chiral condensate and the equation of state at nonzero baryon density from the hadron resonance gas model with a repulsive mean field
    D Biswas, P Petreczky, S Sharma
    Physical Review C 109 (5), 055206 , 2024
    2024
    Citations: 8
  • Formation of light nuclei at chemical freezeout: Description within a statistical thermal model
    D Biswas
    Physical Review C 102 (5), 054902 , 2020
    2020
    Citations: 8
  • Effects of strangeness on the chiral pseudocritical line
    MS Ali, D Biswas, A Jaiswal, H Mishra
    Physical Review D 109 (11), 114017 , 2024
    2024
    Citations: 7
  • Analyzing COVID-19 pandemic with a new growth model for population ecology
    D Biswas, S Roy
    arXiv preprint arXiv:2004.12950 , 2020
    2020
    Citations: 6
  • Hadron momentum spectra from analytical solutions of relativistic hydrodynamics
    MS Ali, D Biswas, A Jaiswal, SK Singh
    The European Physical Journal C 85 (1), 30 , 2025
    2025
    Citations: 3
  • Vector interaction bounds in NJL-like models from LQCD estimated curvature of the chiral crossover line
    MS Ali, D Biswas, CA Islam
    The European Physical Journal A 61 (10), 1-13 , 2025
    2025
    Citations: 2
  • Cumulants of net-strangeness multiplicity distributions at energies available at the BNL Relativistic Heavy Ion Collider
    C Li, D Biswas, NR Sahoo
    Physical Review C 107 (6), 064905 , 2023
    2023
    Citations: 1
  • Effect of quark flavor coupling on chiral crossover line
    MS Ali, D Biswas, A Jaiswal, H Mishra
    Journal of Subatomic Particles and Cosmology, 100220 , 2025
    2025
  • Chemical freeze-out parametrization with mean field repulsive hadron resonance gas model
    SK Singh, N Sarkar, D Biswas
    arXiv preprint arXiv:2307.05930 , 2023
    2023
  • Aspects of chiral transition in a Hadron Resonance Gas model
    D Biswas, P Petrezcky, S Sharma
    EPJ Web of Conferences 274, 05010 , 2022
    2022
  • A thermal model study of the formation of nuclei and hypernuclei
    D Biswas
    Proceedings of the DAE Symp. on Nucl. Phys 65, 646 , 2021
    2021
  • A root finding method for parametrizing the chemical freeze-out surface in heavy-ion Collision Experiments
    D Biswas
    64th DAE BRNS Symposium on nuclear physics 64 (2020), 798-799 , 2020
    2020