Thomas C Mehen, Associate Professor  

Thomas C Mehen

Office Location: 249 Physics
Office Phone: 660 2555
Email Address:
Web Page:

Theoretical particle physics and string theory
Theoretical nuclear physics

Ph.D., Johns Hopkins University, 1998
B.S., University of Virginia, 1992

Research Categories: Theoretical Nuclear and Particle Physics

Research Description: Prof. Thomas Mehen works primarily on Quantum Chromodynamics (QCD) and the application of effective field theory to problems in hadronic physics. Effective field theories exploit the symmetries of hadrons to make model independent predictions when the dynamics of these hadrons are too hard to solve explicitly. For example, the properties of a hadron containing a very heavy quark are insensitive to the orientation of the heavy quark spin. Prof. Mehen has used this heavy quark spin symmetry to make predictions for the production and decay of heavy mesons and quarkonia at collider experiments. Another example is the chiral symmetry of QCD which is a consequence of the lightness of the up and down quarks. The implications of this symmetry for the force between nucleons is a subject of Prof. Mehen's research. Prof. Mehen has also worked on effective field theory for nonrelativistic particles whose short range interactions are characterized by a large scattering length. This theory has been successfully applied to low energy two- and three-body nuclear processes. Some of Prof. Mehen's work is interdisciplinary. For example, techniques developed for nuclear physics have been used to calculate three-body corrections to the energy density of a Bose-Einstein condensate whose atoms have large scattering lengths. Prof. Mehen has also worked on novel field theories which arise from unusual limits of string theory. Examples include noncommutative field theories and theories of tachyonic modes on non-BPS branes.

Teaching (Fall 2015):

  • Physics 141ldk.001, General physics i Synopsis
    Dkua 1078, MTuWTh 10:30 AM-11:45 AM

Recent Publications   (More Publications)   (search)

  1. Matthew Baumgart, Adam K. Leibovich, Thomas Mehen, and Ira Z. Rothstein, Probing Quarkonium Production Mechanisms with Jet Substructure, JHEP 1411 003 (2014) [2295] .
  2. Chul Kim, Ahmad Idilbi, Thomas Mehen, and Yeo Woong Yoon, Production of Stoponium at the LHC, Phys. Rev D89:075010 (2014) [1284] .
  3. Thomas Mehen, Exotic Quarkonium Spectroscopy: X(3872) Z(10610) Z(10650) in Non-Relativistic Effective Theory, Conference Proeceedings for PhiPsi 2013, Rome, Italy, September 11, 2013 (Accepted, 2013) .
  4. Thomas Mehen and Joshua W. Powell, Line shapes in Υ(5S)→B(∗) B(∗)π with Z(10610) and Z(10650) using effective field theory, Phys. Rev. D88:034017 (2013) [5459] .
  5. S. Fleming, A.K. Leibovich, T. Mehen, and I.Z. Rothstein, Anomalous dimensions of the double parton fragmentation functions, Phys. Rev. D87:074022 (2013) [3822] .

Current Ph.D. Students   (Former Students)

  • Reggie Bain  
  • Yiannis Makris  
  • Dilun Yang  
  • Jie Hu  
Postdocs Mentored

  • Jared Vanasse (2012- present)  
  • Chul Kim (September 2007 -December 2009)  
  • Ahmad Idilbi (September, 2006 - February, 2010)  
  • Brian Tiburzi (September, 2004 - August, 2006)  
  • Carlos Schat (2002/09-2004/09)