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.
Srivastava, D. K., et al. “Production of charm quarks in a parton cascade model for relativistic heavy ion collisions at s NN =200 GeV.” Physical Review C, vol. 96, no. 6, Dec. 2017. Scopus, doi:10.1103/PhysRevC.96.064906. Full Text
Moreland, J. S., et al. “Flow in small and large quark-gluon plasma droplets: the role of nucleon substructure.” Nuclear Physics A, vol. 967, Nov. 2017, pp. 361–64. Scopus, doi:10.1016/j.nuclphysa.2017.05.054. Full Text
Bernhard, J. E., et al. “Characterization of the initial state and QGP medium from a combined Bayesian analysis of LHC data at 2.76 and 5.02 TeV.” Nuclear Physics A, vol. 967, Nov. 2017, pp. 293–96. Scopus, doi:10.1016/j.nuclphysa.2017.05.037. Full Text
Bass, S. A., et al. “Determination of Quark-Gluon-Plasma Parameters from a Global Bayesian Analysis.” Nuclear Physics A, vol. 967, Nov. 2017, pp. 67–73. Scopus, doi:10.1016/j.nuclphysa.2017.05.052. Full Text
Auvinen, J., et al. “Revealing the collision energy dependence of η/s in RHIC-BES Au+Au collisions using Bayesian statistics.” Nuclear Physics A, vol. 967, Nov. 2017, pp. 784–87. Scopus, doi:10.1016/j.nuclphysa.2017.05.107. Full Text
Nahrgang, M., et al. “Baryon number diffusion with critical fluctuations.” Nuclear Physics A, vol. 967, Nov. 2017, pp. 824–27. Scopus, doi:10.1016/j.nuclphysa.2017.04.021. Full Text
Xu, Y., et al. “A data-driven analysis of the heavy quark transport coefficient.” Nuclear Physics A, vol. 967, Nov. 2017, pp. 668–71. Scopus, doi:10.1016/j.nuclphysa.2017.05.035. Full Text
Ke, W., et al. “Constraints on rapidity-dependent initial conditions from charged-particle pseudorapidity densities and two-particle correlations.” Physical Review C, vol. 96, no. 4, Oct. 2017. Scopus, doi:10.1103/PhysRevC.96.044912. Full Text
Cao, S., et al. “Multistage Monte Carlo simulation of jet modification in a static medium.” Physical Review C, vol. 96, no. 2, Aug. 2017. Scopus, doi:10.1103/PhysRevC.96.024909. Full Text
Xu, Y., et al. “Traces of nonequilibrium dynamics in relativistic heavy-ion collisions.” Physical Review C, vol. 96, no. 2, Aug. 2017. Scopus, doi:10.1103/PhysRevC.96.024902. Full Text
Dumitru, A., and S. A. Bass. “Collective evolution of hot QCD matter from the QGP to freeze-out.” Intersections of Particle and Nuclear Physics, edited by Z. Parsa and W. J. Marciano, vol. 549, AMER INST PHYSICS, 2000, pp. 359–62.
Bass, S. A., et al. “Hadrochemical vs. microscopic analysis of particle production and freeze-out in ultrarelativistic heavy ion collisions.” Advances in Nuclear Dynamics 4, edited by W. Bauer and H. G. Ritter, PLENUM PRESS DIV PLENUM PUBLISHING CORP, 1998, pp. 13–24.
BASS, S. A., et al. “COLLECTIVE EFFECTS OF MESONS AT SIS ENERGIES.” Hot and Dense Nuclear Matter, edited by W. Greiner et al., vol. 335, PLENUM PRESS DIV PLENUM PUBLISHING CORP, 1994, pp. 463–74.
BASS, S. A., et al. “AZIMUTHAL ANISOTROPIES OF PIONS IN HEAVY-ION COLLISIONS - A NEW CHANCE OF PROBING THE HOT AND DENSE REACTION PHASE.” Frontier Topics in Nuclear Physics, edited by W. Scheid and A. Sandulescu, vol. 334, PLENUM PRESS DIV PLENUM PUBLISHING CORP, 1994, pp. 439–40.