Volker Burkert

Volker D. Burkert is a German physicist, academic and researcher. He is a Principal Staff Scientist at the Thomas Jefferson National Accelerator Facility, also known as Jefferson Lab in Newport News, Virginia, United States.

His work has focused on studies of nucleon structure and on the development of CLAS and CLAS12, large-acceptance spectrometers used in electron-scattering experiments. In 2018, Burkert co-authored "The pressure distribution inside the proton", a study published in Nature, which described the first measurement of a mechanical property of a subatomic particle.

Burkert is a Fellow of the American Physical Society and the recipient of the 2019 Virginia Governor's Outstanding Scientist Award. In 2025, he received the Tom W. Bonner Prize in Nuclear Physics from the American Physical Society.

Career Burkert began his career as a research associate at Bonn University in 1975. Following a sabbatical in the US in 1984, he joined the Continuous Electron Beam Accelerator Facility (CEBAF) in 1985 as a staff scientist. His research has focused on the internal structure of protons, neutrons and nuclei, including nucleon excitations, electron-scattering measurements, and the development and use of large-acceptance detector systems. DVCS measurements provided an experimental basis for studies of generalized parton distributions, which are used to investigate the three-dimensional quark structure and mechanical properties of the proton. These results were based on measurements of differential cross sections and beam-spin asymmetries in hard exclusive photon electroproduction on the proton over a wide kinematic range and with high statistical precision.

In 2023, Burkert co-authored a Reviews of Modern Physics colloquium on gravitational form factors of the proton, reviewing theoretical and experimental progress in interpreting these form factors in terms of the proton's mechanical properties.

Nucleon resonances and exotic baryons Burkert reviewed experimental claims from 2003 and 2004 concerning possible pentaquark states, including the proposed exotic baryon Θ+(1540). A pentaquark state would consist of four quarks and one antiquark, unlike ordinary baryons, which are composed of three quarks. In a 2012 review with Inna Aznauryan, he discussed experimental and theoretical progress on the electroexcitation amplitudes of the four lowest excited states. Burkert later co-authored a review of the Roper resonance in Reviews of Modern Physics. Similar, though smaller, effects were also reported for other excited states, including Δ(1232)3/2+, N(1520)3/2−, and N(1535)1/2−. 2013 - Member, Particle Data Group (PDG), Section Unstable Baryons 2019 - Outstanding Scientist Award, Governor of Virginia 2021 - Outstanding Achievements in Nuclear and Particle Physics, MARQUIS Who's Who, 2025 - Tom W. Bonner Prize in Nuclear Physics, American Physical Society Division of Nuclear Physics, for work on large-acceptance spectrometers.

Selected publications N* Physics and Nonperturbative Quantum Chromodynamics, S. Simula, B. Saghai, V. D. Burkert and N. C. Mukhopadhyay, eds. Springer, 1999. ISBN 978-3-211-83299-8. Excited Nucleons and Hadronic Structure, Proceedings of the NSTAR 2000 Conference, 16–19 February 2000, Newport News, Virginia, V. D. Burkert, L. Elouadrhiri, J. J. Kelly and R. C. Minehart, eds. World Scientific, 2000. "Observation of Exclusive Deeply Virtual Compton Scattering in Polarized Electron Beam Asymmetry Measurements". Physical Review Letters, 87(18), 182002 (2001). "The CEBAF large acceptance spectrometer (CLAS)". Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 503(3), 513–553 (2003). "Have Pentaquark States Been Seen?" International Journal of Modern Physics A, 21(8n09), 1764–1777 (2006). Electromagnetic Interactions and Hadronic Structure, F. Close, S. Donnachie and G. Shaw, eds. Cambridge University Press, 2007. ISBN 978-0-521-84420-8. doi:10.1017/CBO9780511534928. The 8th International Workshop on the Physics of Excited Nucleons, Newport News, Virginia, 17–20 May 2011, V. D. Burkert, M. Jones, M. Pennington and D. Richards, eds. AIP Conference Proceedings, 2012. 12th International Conference on Meson-Nucleon Physics and the Structure of the Nucleon, D. Armstrong, V. Burkert, W. Detmold, J. Dudek, J. P. Chen, W. Melnitchouk and D. Richards, eds. AIP Conference Proceedings, 2011. ISBN 9780735409347. "Electroexcitation of nucleon resonances". Progress in Particle and Nuclear Physics, 67(1), 1–54 (2012). "Review of Particle Physics". Physical Review D, 98(3), 030001 (2018). "The pressure distribution inside the proton". Nature, 557(7705), 396–399 (2018). "Roper resonance: Toward a solution to the fifty year puzzle". Reviews of Modern Physics, 91(1), 011003 (2019). "Review of Particle Physics". Progress of Theoretical and Experimental Physics, 2020(8), 083C01 (2020). "The CLAS12 spectrometer at Jefferson Laboratory". Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 959, 163419 (2020). "Colloquium: Gravitational form factors of the proton". Reviews of Modern Physics, 95(4), 041002 (2023).