Steffen A. Bass
Arts and Sciences Distinguished Professor of Physics
Professor of Physics
Chair of Physics
Prof. Bass does research at the intersection of theoretical nuclear and particle physics, in particular studying highly energetic collisions of heavy nuclei, with which one aims to create a primordial state of matter at extremely high temperatures and densities (the Quark-Gluon-Plasma) that resembles the composition of the early Universe shortly after the Big Bang.
It has been only in the last two decades that accelerators have been in operation that give us the capabilities to create the conditions of temperature and density in the laboratory that are favorable for the Quark-Gluon-Plasma (QGP) to exist. The Relativistic Heavy-Ion Collider (RHIC) at Brookhaven National Laboratory and the accompaniment of detector systems were built specifically to observe and study this phase of matter. Similar studies have recently commenced at the CERN Large Hadron Collider. The experiments at RHIC have discovered a new form of ultra-dense matter with unprecedented properties, a plasma composed of unbound quarks and gluons, that appears to behave as a nearly ``perfect liquid.''
Prof. Bass is a leading expert in the phenomenology of the Quark-Gluon-Plasma (QGP) and in knowledge extraction from large scale data sets via computational modeling. He is best known for his work developing a variety of computational models for the description of these ultra-relativistic heavy-ion collisions, as well as for his contributions to the phenomenology of the QGP and the determination of the shear viscosity of the QGP.
Prof. Bass is a member of the Divisions of Nuclear and Computational Physics of the American Physical Society. He has published more than 160 peer-reviewed articles. He is a member of the Editorial Board of Journal of Physics G: Nuclear and Particle Physics. In 2014 he was named Outstanding Referee for APS Journals and was elected a Fellow of the American Physical Society.
Hot Quarks 2008 awarded by National Science Foundation (Principal Investigator). 2008 to 2009
Modeling and Analysis of Ultra-Realistic Heavy-Ion Collisions awarded by Department of Energy (Principal Investigator). 2003 to 2008
Probing the QCD Equation of State and Hadronization at RHIC awarded by National Science Foundation (Principal Investigator). 2003 to 2007
Quantum Chromodynamics and Nuclear Physics at Extreme Energy Density awarded by Department of Energy (Co-Principal Investigator). 1995 to 2005
Hot Quarks 2004 - A Workshop on the Physics of Ultrarelativistic Nucleus-Nucleus Collisions for Young Scientists awarded by National Science Foundation (Principal Investigator). 2004 to 2005
7th International Conference on Strangeness in Quark Matter awarded by National Science Foundation (Principal Investigator). 2003 to 2004
Moreland, J. S., et al. “Estimating nucleon substructure properties in a unified model of p-Pb and Pb-Pb collisions.” Nuclear Physics A, vol. 982, Feb. 2019, pp. 503–06. Scopus, doi:10.1016/j.nuclphysa.2018.07.011. Full Text
Yao, X., et al. “Quarkonium production in heavy ion collisions: coupled Boltzmann transport equations.” Nuclear Physics A, vol. 982, Feb. 2019, pp. 755–58. Scopus, doi:10.1016/j.nuclphysa.2018.10.005. Full Text
Yao, Xiaojun, et al. “Quarkonium production in heavy ion collisions: coupled Boltzmann transport equations.” Proceedings of International Conference on Hard and Electromagnetic Probes of High Energy Nuclear Collisions — Pos(Hardprobes2018), Sissa Medialab, Jan. 2019. Crossref, doi:10.22323/1.345.0157. Full Text
Xu, Y., et al. “Resolving discrepancies in the estimation of heavy quark transport coefficients in relativistic heavy-ion collisions.” Physical Review C, vol. 99, no. 1, Jan. 2019. Scopus, doi:10.1103/PhysRevC.99.014902. Full Text
Ke, W., et al. “Linearized Boltzmann-Langevin model for heavy quark transport in hot and dense QCD matter.” Physical Review C, vol. 98, no. 6, Dec. 2018. Scopus, doi:10.1103/PhysRevC.98.064901. Full Text
Srivastava, DK, Chatterjee, R, and Bass, SA. "Landau-Pomeranchuk-Midgal effect and charm production in pp collisions at energies available at the CERN Large Hadron Collider using the parton cascade model." Physical Review C 98.5 (November 28, 2018). Full Text
Srivastava, D. K., et al. “Transport dynamics of parton interactions in pp collisions at energies available at the CERN Large Hadron Collider.” Physical Review C, vol. 97, no. 6, June 2018. Scopus, doi:10.1103/PhysRevC.97.064910. Full Text
Auvinen, J., et al. “Investigating the collision energy dependence of η/s in the beam energy scan at the BNL Relativistic Heavy Ion Collider using Bayesian statistics.” Physical Review C, vol. 97, no. 4, Apr. 2018. Scopus, doi:10.1103/PhysRevC.97.044905. Full Text
Xu, Y., et al. “Data-driven analysis for the temperature and momentum dependence of the heavy-quark diffusion coefficient in relativistic heavy-ion collisions.” Physical Review C, vol. 97, no. 1, Jan. 2018. Scopus, doi:10.1103/PhysRevC.97.014907. Full Text
Yao, X., et al. “Quarkonium production in heavy ion collisions: Coupled Boltzmann transport equations.” Proceedings of Science, vol. 345, Jan. 2018.
Bluhm, M., et al. “Behavior of universal critical parameters in the QCD phase diagram.” Journal of Physics: Conference Series, vol. 779, no. 1, 2017. Scopus, doi:10.1088/1742-6596/779/1/012074. Full Text
Nahrgang, M., et al. “Toward the description of fluid dynamical fluctuations in heavy-ion collisions.” Acta Physica Polonica B, Proceedings Supplement, vol. 10, no. 3, 2017, pp. 687–92. Scopus, doi:10.5506/APhysPolBSupp.10.687. Full Text
Moreau, P., et al. “Traces of non-equilibrium dynamics in relativistic heavy-ion collisions.” Proceedings of Science, vol. 2017-August, 2017.
Auvinen, J., et al. “Parameter extractions for RHIC BES using Bayesian statistics.” Proceedings of Science, vol. 2017-August, 2017.
Hao, L., et al. “Visualizing static ensembles for effective shape and data comparison.” Is and T International Symposium on Electronic Imaging Science and Technology, vol. 0, 2016. Scopus, doi:10.2352/issn.2470-1173.2016.1.vda-509. Full Text
Cao, S., et al. “Heavy quark energy loss and angular de-correlation in a quark-gluon plasma matter.” Journal of Physics: Conference Series, vol. 446, no. 1, 2013. Scopus, doi:10.1088/1742-6596/446/1/012035. Full Text
Bass, S. A., et al. “Hadronization at RHIC: Interplay of recombination and fragmentation.” Ichep 2005: Proceedings of the 32nd International Conference High Energy Physics Vols 1 and 2, edited by H. Chen et al., WORLD SCIENTIFIC PUBL CO PTE LTD, 2005, pp. 347–51.
Bass, S. A., et al. “Hadronization at RHIC: Interplay of recombination and fragmentation.” Structure and Dynamics of Elementary Matter, edited by W. Greiner et al., vol. 166, SPRINGER, 2004, pp. 225–37.
Bass, S. A., et al. “Probing hadronization with strangeness.” Nonequilibrium and Nonlinear Dynamics in Nuclear and Other Finite Systems, edited by Z. X. Li et al., vol. 597, AMER INST PHYSICS, 2001, pp. 54–63.