Jörn Knoll
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Contact Affiliations Fields of Interest   Publications: Collision Dynamics and Decoupling Hadrons and Resonances in Dense Matter Non Equilibrium Quantum Field Theory Renormalization of resummation scheemes Transport Theory for Resonances Coherence Phenomena Hadronization Dynamics Multifragmentation Dynamics Nucleus-Nucleus Collision Dynamics  Semiclassical Theory Electron Scattering on Nuclei      GSI: Theory Home-page GSI Home-page

Electronic Mail to J.Knoll

Affiliations and Functions:

• Senior Scientist in the Theory Division of GSI (since 1980; since 2023 as Guest Scientist)
• APL-Professor at the Faculty of Physics and Astronomy of the University of Heidelberg, D 69120 Heidelberg (since 1995)
• Organizer of the GSI Summer Student Program (1985 - 2022)
• Together with H. Feldmeier, K. Langanke and J. Wambach (TuDa/GSI): Organizer of the Hirschegg Workshops (till 2008)
• former member (1990 - 2004) and twice chair person (1990-91 & 1998-99) of the GSI-Scientific Committee (Wissenschftlicher Ausschuss)
• Member of GSI's sport club "Schnelle Ionen e.V." (since 1985; as managing board member/ sport coordinator since 2013)

Books, Lecture notes and excercises

• The CBM Physics Book (Eds: B. Friman, C. Höhne, J. Knoll, S. Leupold, J. Randrup, R. Rapp, P. Senger)
  Published in Lecture Notes in Physics Volume 814, 2011, DOI: 10.1007/978-3-642-13293-3 (top cited 300+)
• Introduction to the physics of hot and dense hadronic matter (B. Friman & J. Knoll)

Fields of Interest

• Non-equilibrium Quantum Field Theory
• Dynamics of Nucleus-Nuleus Collisions at Intermediate and High Energies
• Properties of Hot and Dense Hadronic Matter
• Finite Space--Time Coherence Effects

• Publications listed by INSPIRE

Collision Dynamics and continuous Decoupling

• "Suppression of back-to-back particle--antiparticle correlations in high energy nuclear collisions", Phys. Rev. C 83, 044914 (2011)
• "Continuous decoupling of dynamically expanding systems", presented at Hirschegg 2010
• "Continuous decoupling and freeze-out", Acta Phys.Polon.B40:1037-1044,2009, presented on the 4th Workshop on Particle Correlations and Femtoscopy, Krakow, Sept. 2008.
• "Continuous decoupling of dynamically expanding systems", Nucl. Phys. A821:235-250,2009

Hadrons and Resonances in dense matter

• "Selfconsistent descriptions of vector-mesons in hot matter reexamined", Phys.Rev.C82:025207,2010 with Felix Riek,
• Comment on: 'Non-perturbative finite T broadening of the rho meson and dilepton emission in heavy ion-collisions' by J. Ruppert and T. Renk. nucl-th/0607023
• Dynamics of Resonances in Strongly Interacting Matter (Resonance Transport)
• Dynamics of Resonances in Strongly Interacting Systems with Yu.B. Ivanov, F. Riek and D. Voskresensky nucl-th/0512040 J.Phys.Conf.Ser.35:357-372,2006
• "Self-consistent description of vector-mesons in matter", Nucl. Phys. A 740 (2004) pp.287-308, with F. Riek
• "Finite pion width effects on the rho meson", Nucl. Phys. A683 (2001) 369, with H. van Hees;
• "Finite pion width effects on the rho meson and di-lepton spectra", invited talk, H. van Hees, Hirschegg workshop, Jan. 17 - 23, 2000, hep-ph/0002087

Non-equilibrium quantum field theory

• "Renormalization of a gapless Hartree-Fock approximation to a theory with spontaneously broken O(N)-symmetry", Phys.Rev.D72:036008,2005 with Yu.B. Ivanov, F. Riek and H. van Hees
• "Renormalization of self-consistent Φ-derivable approximations", with H. van Hees, hep-ph/0210262, Proceedings of the workshop "Progress in Nonequilibrium Greens Functions, Dresden, Germany, 19.-22. August 2002, p. 348"
• "Renormalization of self-consistent Schwinger-Dyson equations at finite temperature", with H. van Hees, hep-ph/0202263, Contribution to the proceedings of the International Workshop XXX on Gross Properties of Nuclei and Nuclear Excitations - Ultrarelativistic Heavy-Ion Collisions, Jan. 13-19, 2002, Hirschegg, Austria
• "Renormalization in Self-Consistent Approximation Schemes at Finite Temperature III: Global Symmetries", Phys.Rev.D66:025028,2002, with H. van Hees (top cited 100+)
• "Renormalization in Self-Consistent Approximation Schemes at Finite Temperature II: Applications to the Sunset Diagram", with H. van Hees, Phys.Rev.D65:105005,2002, (top cited 100+)
• "Renormalization in Self-Consistent Approximation schemes at Finite Temperature I: Theory", with H. van Hees, Phys.Rev.D65:025010,2002, (top cited 150+)
• "Exact Conservation Laws for the Gradient Expanded Kadanoff-Baym Equations", Ann. Phys. (NY) 293 (2001) 126, with Yu.B. Ivanov and D. Voskresensky (top cited 50+)

• "Gapless Hartree-Fock-Resummation Scheme for the O(N)-Model", Phys.Rev.D71:105016,2005 with Yu.B. Ivanov and F. Riek
• "Self-consistent Approach to Off-Shell Transport", with Yu.B. Ivanov and D. Voskresensky, Yad Fiz 66 (2003) 1950, engl. Phys. Atom. Nucl. 66 (2003) 1902, hep-ph/0303006, dedicated to S.T. Belyaev on the occasion of his 80th birthday
• "Soft Modes, Quantum Transport and Kinetic Entropy", with Yu.B. Ivanov and D. Voskresensky; Kadanoff-Baym workshop, Rostock, Oct. 20- 24 1999, published in "Progress in nonequilibrium Green's functions", p 310, World Scientific Publ. Co (2000)
• "Transport dynamics of broad resonances", Progress in particle and nuclear physics 42, 177 - 186 (1999)
• "Resonance transport and kinetic entropy", Nucl. Phys. A 672 (2000) 313, with Yu.B. Ivanov and D. Voskresensky; nucl-th/9905028 (top cited 100+)
• "Transport Dynamics of Broad Resonances", nucl-th/9811099, contribution to the Erice School on Nuclear Physics in Erice, Sicily, Italy, September 17 -25 1998, published in Progress in Particle and Nuclear Physics, Vol 42. (1999) p. 177
• "Towards a Quantum Transport Description of Particles with Finite Mass Width", hep-ph/9809419, contribution to the Thermal-Field-Theory workshop, TFT-98, Regensburg, Aug. 10-15 1998.
• "Self-Consistent Approximations to Non-Equilibrium Many-Body Theory", Nucl. Phys. A 657 (1999) 413, extended version of hep-ph/9807351, with Yu.B. Ivanov and D. Voskresensky; (top cited 50+ (93 citations))

Coherence Effects and Sum Rules for Photon Production

• "Photons from Dense Matter", lectures given at the TAPS workshop, Bosen, Germany; Sep. 11-15, 1995
• "Classical and quantum many-body description of bremsstrahlung in dense matter (Landau - Pomeranchuk - Migdal effect)", Ann. Phys. (N.Y.) 249 (1996) 532,, with D. Voskresensky; 50 pages; 4 figs.; (top cited 50+)
• "Non-equilibrium description of bremsstrahlung in dense matter (Landau - Pomeranchuk - Migdal effect)", with D. Voskresensky; Phys. Lett. B 351 (1995) 43
• "Coherence Effects in Radiative Scattering - a Study of an Exactly Solvable Hard Scattering Model", Nucl. Phys. A 561 (1993) 501, with R. Lenk
• "Space-time Effects in the Decay of Strings by Pair Creation" Phys. Lett. B 234 (1990) 437, with M. Herrmann (25 citations)
• "Sum Rules at Finite Temperature and the Limitations of Kinetic Particle- Production Models", Nucl. Phys. A 494 (1989) 334 , with C. Guet
• "Quenching Effects in Photon Production", Nucl. Phys. A 496 (1989) 539, with M. Durand

Hadronization Dynamics

• "The Hadronization of a Quark--gluon Plasma", Prog. Part. Nucl. Phys. 30 (1993) 393, with H. W. Barz, B. L. Friman and H. Schulz
• "Production of Strangeness and Vector Mesons from a Decaying Quark-gluon Plasma", Nucl. Phys. A545 (1992) 259c, with H. W. Barz, B. L. Friman and H. Schulz
• "Do Strangelets Survive?" , Nucl. Phys. A 519 (1991) 479c, with H. W. Barz, B. L. Friman and H. Schulz
• "Strangeness Production in Ultra-relativistic Heavy-ion Collisions" , Nucl. Phys. A 525c (1991) 831, with H. W. Barz, B. L. Friman and H. Schulz
• "Dynamics of the Quark-gluon Plasma Droplets", Nucl. Phys. Suppl. 24 B (1991) 211, with H. W. Barz, B. L. Friman and H. Schulz
• "Production of Φ, ρ and ω--mesons in the Hadronization of a Quark-gluon Plasma ", Phys. Lett. 245 B (1991) 315, with H. W. Barz, B. L. Friman and H. Schulz
• "Is the Quark-gluon Plasma Detectable from Flavour Signals" Nucl. Phys. A 495 (1990) 401c
• "Evaporation of Hadrons from Quark-gluon Plasma Globs" Phys. Lett. B 242 (1990) 328, with H. W. Barz, B. L. Friman and H. Schulz
• "Strangeness Production in Ultra-relativistic Heavy-ion Collisions: Flavour Kinetics II", Nucl. Phys. A 519 (1990) 831 with H. W. Barz, B. L. Friman and H. Schulz (43 citations; Inspire record)
• "Nuclear Matter - Quark Matter Phase Diagram with Strangeness", Phys. Rev. D 40 (1989) 157, with H. W. Barz, B. L. Friman and H. Schulz (34 citations, Inspire record)
• "Flavour Kinetics in an Expanding Quark-Gluon Plasma", Nucl. Phys. A484 (1988) 661, with H. W. Barz, B. L. Friman and H. Schulz (top cited 100+)
• "The Materialisation Phase in the Colour Rope Picture", Z. Phys. C38 (1988) 187
• "Colour Rope Model for Extreme Relativistic Heavy Ion Collisions", Nucl. Phys. B245 (1984) 449, with T. S. Biro and H. B. Nielson (top cited 200+; 284 citations)

Other Subjects

• "First Stages of Matter Growth in a Dynamical Percolation Model", Phys. Lett. A 147 (1990) 23, with O. Knospe and R. Schmidt,

Some Earlier Publications

Multifragmentation Dynamics

• "Dynamical multifragmentation of highly excited nuclear systems", Physics letters / B 165(4-6), 256 - 261 (1985) with T.S. Biro
• "The Dynamics of the Nuclear Disassembly in a Field-theoretical Model at Finite Entropies", Phys. Lett 149B (1984) 45, with B. Strack
• "Percolation in Finite Space: A Picture of Nuclear Fragmentation", Nucl. Phys A 459 (1986) 692, with T. S. Biro and J. Richert (top cited 50+)
• "Expansion Dynamics and Multifragmentation of a Saturating System of Fermions", Nucl. Phys. A481 (1988) 173, with J. Wu

Nucleus--Nucleus Collision Dynamics

• Lecture Notes/ Review Talks

• "An Introduction to the Geometrical and Dynamical Aspects of Collisions among Nuclei at High and Relativistic Energies"; Lecture notes, INS Numa 9, 1978, Institut for Nuclear Study, Tokyo, Japan
• "The Dynamics of Heavy-ion Reactions at Relativistic Energies", in 'Quark matter formation and heavy-ion collisions', Bielefeld, May 1982, ed. by M. Jacob and H. Satz, World Scientific, p. 95

• Properties of Inclusive Spectra

• "Rows on Rows - A Theory for Collisions of Heavy Ions at High Energies"; Nucl. Phys. A290 (1977) 460-492, with J. Hüfner (top cited 100+ (science direct))
• "Microscopic Study of the Equilibration in High-Energy Nuclear Collisions"; Nucl. Phys. A324 (1979) 445-463, with J. Randrup (top cited 50+)
• "Statistical Picture of High-Energy Nuclear Collisions", Phys. Rev. C20 (1979) 773-780 (top cited 50+, 82 citations)
• "Finite Particle Number Effects in High-Energy Nuclear Collisions: Implications on Pion Spectra", Nucl. Phys. A356 (1981) 498, with S. Bohrmann (38 citations)
• "Energetic particles emitted from energetic nuclear reactions" The European physical journal / A 306(2), 177 - 182 (1982) with A.H. Blin and S. Bohrmann
• "DO WE SEE FINITE PARTICLE NUMBER EFFECTS IN CENTRAL HIGH-ENERGY HEAVY ION COLLISIONS?", Nucl.Phys.A 343 (1980) 511-518 (39 citations)
• "Deutron-production - An Entropy Puzzle?", Phys. Lett. 112B (1982) 13, with L. Münchow, G. Röpke and H. Schulz
• "Subthreshold Pion Production in Nucleus-Nucleus Collisions - A Cooperative Process!", Phys. Lett. 136B (1984) 221, with R. Shyam (35 citations)
• "A Cooperative Mechanism of Subthreshold Pion Production", Nucl.Phys. A426 (1984) 606, with R. Shyam (top cited 50+)
• "Hard Photons from Co-operative Effects in Intermediate Energy Collisions", Heavy-ion Nucl. Phys. A448 (1986) 322, with R. Shyam; Erratum: Nucl. Phys. A459 (1986) 732
• "Energetic Particle Emission from Nuclear Co-operation", Nucl. Phys. A483 (1988) 711, with R. Shyam

• Multi-particle Correlations and Global Observables

• "Proton Proton Correlations in High-Energy Nuclear Collisions", Phys. Lett. 103B (1981) 264 with J. Randrup
• "Event by Event Emission-Pattern Analysis of the Intra-Nuclear Cascade", Phys. Lett. 109B (1982) 167, with J. Cugnon, C. Riedel and Y. Yariv (39 citations)
• "PARTICIPANT INTIMACY - A CLUSTER ANALYSIS OF THE INTRANUCLEAR CASCADE", Nucl.Phys.A 360 (1981) 444-458 with J. Cugnon and J. Randrup (32 citations)
• "Macroscopic nucleon-nucleon correlations caused by the bounce-off process in energetic collisions of heavy nuclei" Physical review / C 25(5), 2482-2490 (1982) with S. Nagamiya, H. Hamagaki, et al.
• "PRODUCTION OF NEGATIVE PIONS WITH 183-MEV/NUCLEON NE BEAMS", Phys.Rev.Lett. 48 (1982) 1780 with S. Nagamyia et.al. (34 citations)

Semiclassical Theory with Complex Classical Paths and Path Integrals

• "Semiclassical Scattering Theory with Complex Trajectories. I. Elastic Waves"; Ann. Phys. (N.Y.) 97 (1976) 307-366, with R. Schaeffer (top cited 50+, 82 citations (science direct))
• "Complex Paths and Uniform Approximations in a Semiclassical Description of Direct Reactions"; Phys. Rep. C 31 (1977) 159-207, with R. Schaeffer
• "Reflection at a Complex Potential Barrier in the Semiclassical Theory of Scattering"; Z. Physik A229 (1976) 415, with Y. Avishai
• "Path Integral Approach to the Solution of Fokker Planck Equations", Phys. Lett. 106B (1981) 443, with W. Cassing

Electron Scattering on Nuclei

• "Analytic Description of Inelastic Electron Scattering on Nuclei"; Nucl. Phys. A223 (1974) 462-476
• "Longitudinal and Transverse Dispersion Corrections in Electron Scattering"; Nucl. Phys. A229 (1974) 333-345, with R. Rosenfelder