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.
The X-SCAPE collaboration: The X+ion collision with a Statistically and Computationally Advanced Program Envelope collaboration awarded by Wayne State University (Principal Investigator). 2020 to 2024
REU Site: Undergraduate Research in Nuclear Particle Physics at TUNL and Duke awarded by National Science Foundation (Senior Investigator). 2018 to 2021
Nuclear Physics at Extreme Energy Density awarded by Department of Energy (Principal Investigator). 2005 to 2021
Collaborative Research: SI2-SSI: Jet Energy-loss Tomography with a Statistically and Computationally Advanced Program Envelope (JETSCAPE) awarded by National Science Foundation (Principal Investigator). 2016 to 2020
Support for Xiaojun Yao awarded by Brookhaven National Labs (Principal Investigator). 2017 to 2019
Fermi Gases in Bichromatic Superlattices awarded by North Carolina State University (Principal Investigator). 2012 to 2018
Optical Control of Interactions in Non-equilibrium Fermi Gases awarded by North Carolina State University (Principal Investigator). 2016 to 2018
Nuclear Physics at Extreme Energy Density awarded by Department of Energy (Principal Investigator). 2005 to 2018
JET Collaboration awarded by Department of Energy (Co-Principal Investigator). 2010 to 2015
NEARLY PERFECT LIQUIDS 2009: From Quark-Gluon Plasma to Ultra-Cold Atoms awarded by National Science Foundation (Principal Investigator). 2009 to 2010
Yao, Xiaojun, et al. “Fate of heavy quark bound states inside quark-gluon plasma.” Hadron Spectroscopy and Structure, WORLD SCIENTIFIC, Aug. 2020. Crossref, doi:10.1142/9789811219313_0118. Full Text
Paquet, J. F., and S. A. Bass. “Effective viscosities in a hydrodynamically expanding boost-invariant QCD plasma.” Physical Review C, vol. 102, no. 1, July 2020. Scopus, doi:10.1103/PhysRevC.102.014903. Full Text
Song, T., et al. “Traces of nonequilibrium effects, initial condition, bulk dynamics, and elementary collisions in the charm observables.” Physical Review C, vol. 101, no. 4, Apr. 2020. Scopus, doi:10.1103/PhysRevC.101.044903. Full Text
Moreland, J. S., et al. “Bayesian calibration of a hybrid nuclear collision model using p-Pb and Pb-Pb data at energies available at the CERN Large Hadron Collider.” Physical Review C, vol. 101, no. 2, Feb. 2020. Scopus, doi:10.1103/PhysRevC.101.024911. Full Text
Ke, W., et al. “Modified Boltzmann approach for modeling the splitting vertices induced by the hot QCD medium in the deep Landau-Pomeranchuk-Migdal region.” Physical Review C, vol. 100, no. 6, Dec. 2019. Scopus, doi:10.1103/PhysRevC.100.064911. Full Text
Bernhard, J. E., et al. “Bayesian estimation of the specific shear and bulk viscosity of quark–gluon plasma.” Nature Physics, vol. 15, no. 11, Nov. 2019, pp. 1113–17. Scopus, doi:10.1038/s41567-019-0611-8. Full Text
Abada, A., et al. “FCC-hh: The Hadron Collider: Future Circular Collider Conceptual Design Report Volume 3.” European Physical Journal: Special Topics, vol. 228, no. 4, July 2019, pp. 755–1107. Scopus, doi:10.1140/epjst/e2019-900087-0. Full Text
Abada, A., et al. “HE-LHC: The High-Energy Large Hadron Collider: Future Circular Collider Conceptual Design Report Volume 4.” European Physical Journal: Special Topics, vol. 228, no. 5, July 2019, pp. 1109–382. Scopus, doi:10.1140/epjst/e2019-900088-6. Full Text
Nahrgang, M., et al. “Diffusive dynamics of critical fluctuations near the QCD critical point.” Physical Review D, vol. 99, no. 11, June 2019. Scopus, doi:10.1103/PhysRevD.99.116015. Full Text
Abada, A., et al. “FCC-ee: The Lepton Collider: Future Circular Collider Conceptual Design Report Volume 2.” European Physical Journal: Special Topics, vol. 228, no. 2, June 2019, pp. 261–623. Scopus, doi:10.1140/epjst/e2019-900045-4. Full Text
Dai, T., et al. “Hard scattering and stochastic reformulation of parton energy loss.” Proceedings of Science, vol. 355, 2019.
Ke, W., et al. “Modeling coherence effects of gluon emission for heavy flavor studies.” Proceedings of Science, vol. 355, 2019.
Fan, W., et al. “Heavy jet analysis within the JETSCAPE framework.” Proceedings of Science, vol. 355, 2019.
Bluhm, M., et al. “Fluctuating fluid dynamics for the QGP in the LHC and BES era.” Epj Web of Conferences, vol. 171, 2018. Scopus, doi:10.1051/epjconf/201817116004. Full Text
Xu, Y., et al. “A data-drive analysis for heavy quark diffusion coefficient.” Epj Web of Conferences, vol. 171, 2018. Scopus, doi:10.1051/epjconf/201817118001. Full Text
Dai, T., et al. “Parton energy loss in the reformulated weakly-coupled kinetic approach.” Proceedings of Science, vol. 345, 2018.
Ke, W., et al. “Towards an extraction of q with an uncertainty controlled energy loss Monte-Carlo.” Proceedings of Science, vol. 345, 2018.
Ke, W., et al. “Constraints on rapidity-dependent initial conditions from charged particle pseudorapidity densities and correlations at the LHC.” Nuclear and Particle Physics Proceedings, vol. 289–290, 2017, pp. 483–86. Scopus, doi:10.1016/j.nuclphysbps.2017.05.113. Full Text
Xu, Y., et al. Data-driven analysis of the temperature dependence of the heavy-quark transport coefficient. Vol. 289–290, 2017, pp. 257–60. Scopus, doi:10.1016/j.nuclphysbps.2017.05.058. Full Text
Auvinen, J., et al. “Multi-strange hadrons and the precision extraction of QGP properties in the RHIC-BES domain.” Journal of Physics: Conference Series, vol. 779, no. 1, 2017. Scopus, doi:10.1088/1742-6596/779/1/012045. Full Text
Determination of QGP Properties from a global Bayesian Analysis. Munich Institute for Astro- and Particle Physics 2018 Programme on Probing the Quark- Gluon-Plasma with Collective Phenomena and Heavy Quarks. September 3, 2018