Steffen A. Bass

Steffen A. Bass

Arts and Sciences Distinguished Professor of Physics

Professor of Physics

Chair of Physics

Office Location: 
261D Physics, Durham, NC 27708
Front Office Address: 
Box 90305, Durham, NC 27708-0305
(919) 660-2479


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.

Education & Training

  • Ph.D., Goethe Universitat Frankfurt Am Main (Germany) 1997

  • M.S., Goethe Universitat Frankfurt Am Main (Germany) 1993

Cao, S., et al. “Heavy-quark dynamics and hadronization in ultrarelativistic heavy-ion collisions: Collisional versus radiative energy loss.” Physical Review C  Nuclear Physics, vol. 88, no. 4, Oct. 2013. Scopus, doi:10.1103/PhysRevC.88.044907. Full Text

Cao, S., et al. “Model and parameter dependence of heavy quark energy loss in a hot and dense medium.” Journal of Physics G: Nuclear and Particle Physics, vol. 40, no. 8, Aug. 2013. Scopus, doi:10.1088/0954-3899/40/8/085103. Full Text

Asakawa, Masayuki, et al. “Center domains and their phenomenological consequences.Physical Review Letters, vol. 110, no. 20, May 2013, p. 202301. Epmc, doi:10.1103/physrevlett.110.202301. Full Text

Cao, S., et al. “Collisional vs. radiative energy loss of heavy quark in a hot and dense nuclear matter.” Nuclear Physics A, vol. 904–905, May 2013, pp. 653c-656c. Scopus, doi:10.1016/j.nuclphysa.2013.02.100. Full Text

Coleman-Smith, C. E., et al. “Systematic Monte-Carlo studies of dijets at RHIC using the VNI/BMS Parton Cascade.” Nuclear Physics A, vol. 904–905, May 2013, pp. 759c-762c. Scopus, doi:10.1016/j.nuclphysa.2013.02.128. Full Text

Cao, S., et al. “Heavy quark energy loss and thermalization in hot and dense nuclear matter.” Journal of Physics: Conference Series, vol. 420, no. 1, Jan. 2013. Scopus, doi:10.1088/1742-6596/420/1/012022. Full Text

Song, H., et al. “Erratum: Hadron spectra and elliptic flow for 200A GeV Au+Au collisions from viscous hydrodynamics coupled to a Boltzmann cascade.” Physical Review C  Nuclear Physics, vol. 86, no. 5, Nov. 2012. Scopus, doi:10.1103/PhysRevC.86.059903. Full Text

Song, H., et al. “Erratum: 200 A GeV Au+Au collisions serve a nearly perfect Quark-Gluon liquid.” Physical Review Letters, vol. 109, no. 13, Sept. 2012. Scopus, doi:10.1103/PhysRevLett.109.139904. Full Text

Bass, S. A., et al. “Probing the QCD critical point with relativistic heavy-ion collisions.” Central European Journal of Physics, vol. 10, no. 6, May 2012, pp. 1278–81. Scopus, doi:10.2478/s11534-012-0076-1. Full Text