Thomas C. Mehen

Professor of Physics

External Address: 
249 Physics Bldg, Durham, NC 27708
Internal Office Address: 
Box 90305, Durham, NC 27708-0305
Phone: 
(919) 660-2555

Overview

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.

Education & Training

  • Ph.D., Johns Hopkins University 1997

  • M.A., Johns Hopkins University 1997

  • B.S., University of Virginia 1992

Lattice and Effective Field Theory Studies of Quantum Chromodynamics awarded by Department of Energy (Co-Principal Investigator). 2005 to 2018

Heavy Quarks, QCD, and Effective Field Theory awarded by Department of Energy (Principal Investigator). 2005 to 2009

Bain, R, Makris, Y, and Mehen, T. "Transverse momentum dependent fragmenting jet functions with applications to quarkonium production." Journal of High Energy Physics 2016.11 (November 2016). Full Text

Yao, X, Mehen, T, and Müller, B. "An effective field theory approach to the stabilization of 8 Be in a QED plasma." Journal of Physics G: Nuclear and Particle Physics 43.7 (July 1, 2016): 07LT02-07LT02. Full Text

Bain, R, Dai, L, Hornig, A, Leibovich, AK, Makris, Y, and Mehen, T. "Analytic and Monte Carlo studies of jets with heavy mesons and quarkonia." Journal of High Energy Physics 2016.6 (June 2016). Full Text

Hornig, A, Makris, Y, and Mehen, T. "Jet shapes in dijet events at the LHC in SCET." Journal of High Energy Physics 2016.4 (April 2016). Full Text

Baumgart, M, Leibovich, AK, Mehen, T, and Rothstein, IZ. "Probing quarkonium production mechanisms with jet substructure." Journal of High Energy Physics 2014.11 (November 2014). Full Text

Kim, C, Idilbi, A, Mehen, T, and Yoon, YW. "Production of stoponium at the LHC." Physical Review D 89.7 (April 2014). Full Text

Fleming, S, Leibovich, AK, Mehen, T, and Rothstein, IZ. "Anomalous dimensions of the double parton fragmentation functions." Physical Review D - Particles, Fields, Gravitation and Cosmology 87.7 (2013). Full Text

Mehen, T, and Powell, JW. "Line shapes in Υ(5S)→B(*)B ̄(*)π with Z(10610) and Z(10650) using effective field theory." Physical Review D - Particles, Fields, Gravitation and Cosmology 88.3 (2013). Full Text

Fleming, S, and Mehen, T. "The decay of the X(3872) into &chicJ and the Operator Product Expansion in XEFT." Phys.Rev. D85:014016 (2012). (Academic Article)

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