Thomas D. Cohen

Thomas D. Cohen is a Theoretical Physicist working on the border of nuclear and particle physics. His research is largely oriented towards understanding nuclear and hadronic properties in terms of the underlying theory of the strong interactions, namely, quantum chromodynamics. He is a Professor in the Physics Department at the University of Maryland and a Fellow of the American Physical Society.

Biography Updated on 23 August 2007

Personal Home Page

http://www.physics.umd.edu/people/faculty/cohen.html

Articles in Scholarly Journals [Incomplete List]

  1. A sticky business: the status of the conjectured viscosity/entropy density bound
    Journal of High Energy Physics, vol. 2008, no. 02, pp. 026–026, 2008
  2. Cohen Replies:
    Physical Review Letters, vol. 100, no. 2, 2008
  3. Thermodynamics and Large Nc QCD
    Progress of Theoretical Physics Supplement, vol. 168, pp. 285–290, 2007
  4. Meson coupling constants at high mass and large NcNc
    Physics Letters B, vol. 653, no. 2-4, pp. 224–229, 2007
  5. Chiral condensate in a constant electromagnetic field
    Physical Review C, vol. 76, no. 5, 2007
  6. Heavy baryons in the Skyrme model: The role of highly anharmonic collective motion
    Physical Review D, vol. 75, no. 9, 2007
  7. Is There a “Most Perfect Fluid” Consistent with Quantum Field Theory?
    Physical Review Letters, vol. 99, no. 2, 2007
  8. New class of quantum bound states: Diprotons in extreme magnetic fields
    Physical Review C, vol. 75, no. 3, 2007
  9. Strange results from chiral soliton models
    Physics Letters B, vol. 651, no. 1, pp. 39–43, 2007
  10. A tale of two skyrmions: The nucleon's strange quark content in different large NcNc limits
    Physics Letters B, vol. 641, no. 5, pp. 401–404, 2006
  11. The Skyrmion strikes back: baryons and a new large Nc limit
    Journal of High Energy Physics, vol. 2006, no. 12, pp. 035–035, 2006
  12. Effective chiral restoration in the hadronic spectrum and QCD
    Nuclear Physics A, vol. 775, no. 1-2, pp. 89–101, 2006
  13. QCD strings and the thermodynamics of the metastable phase of QCD at large NcNc
    Physics Letters B, vol. 637, no. 1-2, pp. 81–84, 2006
  14. Decoupling spurious baryon states in the 1/N_{c} expansion of QCD
    Physical Review D, vol. 74, no. 3, 2006
  15. Interplay of the chiral and large N_{c} limits in pN scattering
    Physical Review D, vol. 74, no. 5, 2006
  16. Doubly heavy hadrons and the domain of validity of doubly heavy diquark-antiquark symmetry
    Physical Review D, vol. 74, no. 9, 2006
  17. Modern Physics Letters A [Particles and Fields; Gravitation; Cosmology and Nuclear Physics], vol. 21, no. 25, p. 1939, 2006
  18. Phase Separation and an Upper Bound for a Generalized Superfluid Gap for Cold Fermi Fluids in the Unitary Regime
    Physical Review Letters, vol. 95, no. 12, 2005
  19. On the existence of heavy pentaquarks: The large N_{c} and heavy quark limits and beyond
    Physical Review D, vol. 72, no. 7, 2005
  20. Phenomenology of the baryon resonance 70-plet at large N_{c}
    Physical Review D, vol. 72, no. 5, 2005
  21. Pion photoproduction amplitude relations in the 1/N_{c} expansion
    Physical Review D, vol. 71, no. 7, 2005
  22. Collective quantization of three-flavored Skyrmions reexamined
    Physical Review D, vol. 72, no. 9, 2005
  23. Excited Baryons in Large QCD
    Nuclear Physics A, vol. 755, pp. 40–48, 2005
  24. SU(3) baryon resonance multiplets in large QCD
    Physics Letters B, vol. 619, no. 1-2, pp. 115–123, 2005
  25. An effective field theory for coupled-channel scattering
    Physics Letters B, vol. 588, no. 1-2, pp. 57–66, 2004
  26. New near-threshold mesons
    Physics Letters B, vol. 578, no. 3-4, pp. 359–364, 2004
  27. Partners of the T+ in large Nc QCD
    Physics Letters B, vol. 578, no. 1-2, pp. 150–155, 2004
  28. Chiral soliton models, large Nc consistency and the T+ exotic baryon
    Physics Letters B, vol. 581, no. 3-4, pp. 175–181, 2004
  29. Large N_{c} QCD at nonzero chemical potential
    Physical Review D, vol. 70, no. 11, 2004
  30. Phenomenological constraints on the Jaffe-Wilczek model of pentaquarks
    Physical Review D, vol. 70, no. 7, 2004
  31. Large-N_{c} Continuum Reduction and the Thermodynamics of QCD
    Physical Review Letters, vol. 93, no. 20, 2004
  32. Pion-nucleon scattering relations at next-to-leading order in 1/N_{c}
    Physical Review D, vol. 70, no. 5, 2004
  33. Excited baryon decay widths in large N_{c} QCD
    Physical Review D, vol. 69, no. 5, 2004
  34. Quantization of exotic states in SU(3) soliton models: A solvable quantum mechanical analog
    Physical Review D, vol. 70, no. 9, 2004
  35. SU(3) Clebsch-Gordan coefficients for baryon-meson coupling at arbitrary N_{c}
    Physical Review D, vol. 70, no. 9, 2004
  36. ?^{+} baryon in soliton models: Large N_{c} QCD and the validity of rigid-rotor quantization
    Physical Review D, vol. 70, no. 1, 2004
  37. Compatibility of quark and resonant picture excited baryon multiplets in the 1/N_{c} expansion of QCD
    Physical Review D, vol. 68, no. 5, 2003
  38. Excited baryons in large N_{c} QCD reexamined: The resonance picture versus single-quark excitations
    Physical Review D, vol. 67, no. 9, 2003
  39. Electromagnetic properties of the ? in the large Nc and chiral limits
    Physics Letters B, vol. 554, no. 1-2, pp. 28–32, 2003
  40. The extraction of gA from finite volume systems: the long and short of it
    Physics Letters B, vol. 529, no. 1-2, pp. 50–56, 2002
  41. Nucleon–nucleon scattering observables in large-Nc QCD
    Physics Letters B, vol. 540, no. 3-4, pp. 227–232, 2002
  42. International Journal of Modern Physics A [Particles and Fields; Gravitation; Cosmology; Nuclear Physics], vol. 17, no. 10, p. 1327, 2002
  43. Spontaneous parity violation in QCD at finite temperature: On the inapplicability of the Vafa-Witten theorem
    Physical Review D, vol. 64, no. 4, 2001
  44. Parity violation in ?[over ?]p Compton scattering
    Physical Review C, vol. 64, no. 5, 2001
  45. Excited heavy baryons and their symmetries III: Phenomenology
    Nuclear Physics A, vol. 696, no. 3-4, pp. 638–666, 2001
  46. Chiral multiplets versus parity doublets in highly excited baryons
    Physical Review D, vol. 65, no. 1, 2001
  47. Model-independent predictions for low energy isoscalar heavy baryon observables in the combined heavy quark and large Nc expansion
    Physics Letters B, vol. 514, no. 3-4, pp. 346–354, 2001
  48. Phases of QCD with nonvanishing isospin density
    Physics Letters B, vol. 516, no. 1-2, pp. 27–32, 2001
  49. Excited heavy baryons and their symmetries I: Formalism
    Nuclear Physics A, vol. 688, no. 3-4, pp. 842–870, 2001
  50. Excited heavy baryons and their symmetries II: Effective theory
    Nuclear Physics A, vol. 692, no. 3-4, pp. 521–545, 2001
  51. Drell-Hearn-Gerasimov sum rule for the nucleon in the large-Nc limit
    Physics Letters B, vol. 474, no. 3-4, pp. 251–254, 2000
  52. Deuteron electromagnetic properties and the viability of effective field theory methods in the two-nucleon system
    Nuclear Physics A, vol. 668, no. 1-4, pp. 45–82, 2000
  53. Symmetries of Excited Heavy Baryons in the Heavy-Quark and Large- N_{c} Limit
    Physical Review Letters, vol. 84, no. 24, pp. 5474–5477, 2000
  54. Quantum coins, dice, and children: Probability and quantum statistics
    American Journal of Physics, vol. 68, no. 9, p. 829, 2000
  55. Testing low energy theorems in nucleon-nucleon scattering
    Physical Review C, vol. 59, no. 6, pp. 3047–3051, 1999
  56. Low energy theorems for nucleon-nucleon scattering
    Physical Review C, vol. 59, no. 1, pp. 13–20, 1999
  57. Systematic power counting in cutoff effective field theories for nucleon-nucleon interactions and the equivalence with PDS
    Physics Letters B, vol. 440, no. 3-4, pp. 233–238, 1998
  58. Quantum number exotic hybrid mesons and large Nc QCD
    Physics Letters B, vol. 427, no. 3-4, pp. 348–352, 1998
  59. Nonperturbative Regularization and Renormalization: Simple Examples from Nonrelativistic Quantum Mechanics
    Annals of Physics, vol. 263, no. 2, pp. 255–275, 1998
  60. The potential of effective field theory in NN scattering
    Nuclear Physics A, vol. 632, no. 3, pp. 445–469, 1998
  61. Regularization, renormalization, and range: The nucleon-nucleon interaction from effective field theory
    Physical Review C, vol. 55, no. 1, pp. 67–72, 1997
  62. Chiral multiplets of hadron currents
    Physical Review D, vol. 55, no. 11, pp. 6870–6876, 1997
  63. How short is too short? Constraining zero-range interactions in nucleon-nucleon scattering
    Physics Letters B, vol. 390, no. 1-4, pp. 7–12, 1997
  64. Relations among correlation functions in the high temperature phase of QCD with broken SU(3)
    Physics Letters B, vol. 399, no. 3-4, pp. 263–266, 1997
  65. Short-range interactions in an effective field theory approach for nucleon-nucleon scattering
    Physical Review C, vol. 56, no. 2, pp. 679–688, 1997
  66. pp?ppp^{0} reaction near threshold: A chiral power counting approach
    Physical Review C, vol. 53, no. 6, pp. 2661–2673, 1996
  67. Isospin violation and possible signatures of disoriented chiral condensates in ultrarelativistic heavy ion collisions
    Physics Letters B, vol. 372, no. 3-4, pp. 193–197, 1996
  68. Symmetry and correlation functions in the high temperature phase of QCD
    Physics Letters B, vol. 388, no. 1, pp. 137–140, 1996
  69. Nucleon electric polarizability in soliton models and the role of the seagull terms
    Nuclear Physics A, vol. 596, no. 3-4, pp. 599–610, 1996
  70. QCD inequalities, the high temperature phase of QCD, and U(1)A symmetry
    Physical Review D, vol. 54, no. 3, pp. R1867–R1870, 1996
  71. Chiral and large-N_{c} limits of quantum chromodynamics and models of the baryon
    Reviews of Modern Physics, vol. 68, no. 2, pp. 599–608, 1996
  72. Relations among zero momentum correlators for heavy-light systems in QCD
    Physical Review D, vol. 51, no. 9, pp. 5316–5318, 1995
  73. Vanishing condensates and anomalously light Goldstone modes in medium
    Physics Letters B, vol. 342, no. 1-4, pp. 25–31, 1995
  74. QCD sum rules and chiral logarithms
    Physics Letters B, vol. 348, no. 3-4, pp. 263–269, 1995
  75. Baryon isovector electric properties and the large Nc and chiral limits
    Physics Letters B, vol. 359, no. 1-2, pp. 23–28, 1995
  76. Pseudo-Goldstone modes in isospin-asymmetric nuclear matter
    Physics Letters B, vol. 348, no. 1-2, pp. 12–18, 1995
  77. ρ-ω mixing off shell and charge symmetry breaking in the N-N potential
    Physical Review C, vol. 52, no. 6, pp. 3428–3436, 1995
  78. QCD sum rules for nucleons in nuclear matter III
    Physical Review C, vol. 49, no. 1, pp. 464–477, 1994
  79. Strange vector form factors of the nucleon
    Physical Review C, vol. 50, no. 6, pp. 3108–3121, 1994
  80. QCD sum rules vs. chiral perturbation theory
    Physics Letters B, vol. 333, no. 1-2, pp. 27–32, 1994
  81. Disoriented chiral condensates and quantum mechanical isospin correlation
    Physics Letters B, vol. 333, no. 1-2, pp. 166–171, 1994
  82. Model-independent extraction of ‖ Vbc ‖ without heavy quark symmetry
    Physical Review D, vol. 50, no. 1, pp. R21–R25, 1994
  83. Unquenching the ? meson
    Physical Review D, vol. 49, no. 7, pp. 3512–3518, 1994
  84. Response of nucleons to external probes in hedgehog models. I. Electromagnetic polarizabilities
    Physical Review D, vol. 47, no. 1, pp. 299–312, 1993
  85. Response of nucleons to external probes in hedgehog models. II. General formalism
    Physical Review D, vol. 47, no. 1, pp. 313–324, 1993
  86. Chiral corrections to lattice calculations of charge radii
    Physical Review D, vol. 47, no. 5, pp. 2147–2150, 1993
  87. Structure of the pion and effective electroweak currents in soliton models of the nucleon
    Physical Review D, vol. 48, no. 5, pp. 2299–2303, 1993
  88. Just how strange? Loops, poles and the strangeness radius of the nucleon
    Physics Letters B, vol. 316, no. 1, pp. 1–6, 1993
  89. Heavy quark symmetry and pair production of heavy mesons. A perturbative QCD estimate
    Physics Letters B, vol. 306, no. 1-2, pp. 134–138, 1993
  90. QCD sum rules for nucleons in nuclear matter II
    Physical Review C, vol. 47, no. 6, pp. 2882–2900, 1993
  91. Composite nucleons and the Dirac sea
    Physical Review C, vol. 45, no. 2, pp. 833–843, 1992
  92. QCD sum rules for nucleons in nuclear matter
    Physical Review C, vol. 46, no. 4, pp. 1507–1527, 1992
  93. Splitting of the neutron and proton electric polarizabilities in a hedgehog model
    Physics Letters B, vol. 283, no. 1-2, pp. 22–26, 1992
  94. Probing vector meson properties in nuclei with photo-production of the neutral pion
    Physics Letters B, vol. 285, no. 4, pp. 325–330, 1992
  95. The role of the ? isobar in chiral perturbation theory and hedgehog soliton models
    Physics Letters B, vol. 292, no. 1-2, pp. 5–9, 1992
  96. Quark and gluon condensates in nuclear matter
    Physical Review C, vol. 45, no. 4, pp. 1881–1893, 1992
  97. Exotic high-isospin baryons in the Skyrme model: Experimental observable or large- N artifact?
    Physical Review D, vol. 43, no. 9, pp. 3089–3092, 1991
  98. In-medium proton-neutron mass difference and the systematics of the Nolen-Schiffer anomaly
    Physical Review C, vol. 43, no. 1, pp. 357–360, 1991
  99. From QCD sum rules to relativistic nuclear physics
    Physical Review Letters, vol. 67, no. 8, pp. 961–964, 1991
  100. Vacuum effects of non-nucleonic baryons in nuclear matter
    Nuclear Physics A, vol. 510, no. 4, pp. 671–688, 1990
  101. Exact effective potential for a scalar source coupled to the sine-Gordon model: Test of effective potentials for composite nucleons
    Physical Review C, vol. 42, no. 3, pp. 970–980, 1990
  102. Finite-density effective sigma meson mass in chiral models
    Physical Review C, vol. 39, no. 3, pp. 1032–1038, 1989
  103. Color-dielectric models from a lattice point of view
    Physical Review D, vol. 40, no. 9, pp. 3060–3065, 1989
  104. Vector mesons, anomalies and the KSFR relation
    Physics Letters B, vol. 233, no. 3-4, pp. 467–473, 1989
  105. Mean-field theory and solitonic matter
    Nuclear Physics A, vol. 495, no. 3-4, pp. 545–563, 1989
  106. The spin content of the proton. The large N and chiral limits revisited
    Physics Letters B, vol. 230, no. 1-2, pp. 129–134, 1989
  107. Quantum level statistics of pseudointegrable billiards
    Physical Review Letters, vol. 62, no. 24, pp. 2769–2772, 1989
  108. Large-N_{c} QCD, composite nucleons, and the Dirac sea
    Physical Review Letters, vol. 62, no. 26, pp. 3027–3030, 1989
  109. Explicit σ meson, topology, and the large-N limit of the Skyrmion
    Physical Review D, vol. 37, no. 11, pp. 3344–3347, 1988
  110. Cohen, Picklesimer, and Van Orden Reply
    Physical Review Letters, vol. 61, no. 12, pp. 1428–1428, 1988
  111. Cutoff dependence of vacuum properties for nucleon-meson quantum field theories
    Physics Letters B, vol. 211, no. 4, pp. 384–388, 1988
  112. Nature of the equivalence between gamma instability and rigid triaxiality for finite boson number
    Physical Review C, vol. 38, no. 2, pp. 1038–1045, 1988
  113. Vacuum instability for model field theories
    Physical Review C, vol. 36, no. 4, pp. 1653–1656, 1987
  114. Exotic isoscalar dipole resonances in the Walecka model
    Physical Review C, vol. 35, no. 5, pp. 1969–1972, 1987
  115. Roper resonance in a color dielectric model
    Physics Letters B, vol. 187, no. 3-4, pp. 229–234, 1987
  116. Medium-modified form factors, relativistic dynamics, and the (e,e’p) reaction
    Physical Review Letters, vol. 59, no. 12, pp. 1267–1269, 1987
  117. Comment on ‘‘Signature of g boson in the interacting-boson model from g-factor variations’’
    Physical Review Letters, vol. 59, no. 5, pp. 605–605, 1987
  118. Cranking in hedgehog models with vector mesons
    Physics Letters B, vol. 177, no. 2, pp. 141–146, 1986
  119. RPA method for quark-meson solitons
    Nuclear Physics A, vol. 458, no. 4, pp. 652–668, 1986
  120. The nucleon-delta splitting in the chiral quark-meson model
    Physics Letters B, vol. 167, no. 1, pp. 21–25, 1986
  121. π NN form factor in the Skyrme model
    Physical Review D, vol. 34, no. 7, pp. 2187–2190, 1986
  122. Semiclassical projection of hedgehog models with quarks
    Physical Review D, vol. 34, no. 11, pp. 3472–3483, 1986
  123. Self-consistency and boson mappings for deformed systems
    Physics Letters B, vol. 158, no. 1, pp. 1–6, 1985
  124. The importance of angular-momentum-four pairs in the dynamics of deformed nuclei
    Nuclear Physics A, vol. 436, no. 1, pp. 165–184, 1985
  125. Microscopic nuclear collective motion studied by classical equations of motion
    Nuclear Physics A, vol. 431, no. 1, pp. 45–74, 1984