Short Biography

Bernd Krusche, born in 1956 in Salzhemmendorf (Germany, Lower Saxony), studied Physics, Mathematics and Pedagogy at the University of Goettingen. He received his Ph.D. for studies in experimental nuclear spectroscopy (gamma ray spectroscopy after thermal neutron capture reactions at ILL Grenoble, nucleon transfer reactions at Technical University of Munich) in 1985 from Goettingen University. He held postdoc positions at Institute Laue Langevin, Grenoble, France and assistent positions at University of Giessen, Germany where he completed his Habilitation in 1996 (photoproduction of mesons). He became a professor of Physics at the University of Basel in 1999. Member of International Research Collaborations (TAPS, A2/Crystal Ball, CB@ELSA, BGO-OD, PANDA, MUSE), spokesperson of the TAPS and CB@ELSA collaborations.

 

Research Summary

The work of our group is centered around hadron physics. Most of the recent results are for the structure of nucleons and mesons, studied with electromagnetic interactions. In particular the investigation of excited nucleon states via photoproduction of mesons and the modification of the properties of nucleon resonances and mesons in the nuclear medium. Both are closely connected to the properties of Quantum-Chromo-Dynamics, the fundamental theory of strong interactions. The excitation spectrum of hadrons reflects directly the underlying symmetries and the internal degrees of freedom. In-medium modifications of the mass and widths of hadrons are closely related to fundamental properties of QCD like partial chiral symmetry restoration and important for the behavior of matter under extreme conditions. The most recent work studies in particular the electromagnetic excitations of the neutron using quasi-free reactions on neutrons bound in light nuclei. These experiments have been extended during the last few years to measurements of single and double polarization observables using polarized beams and polarized targets.

Collaborations

 

Selected Publications

  1. Insight into the narrow structure in η photoproduction on the neutron from helicity-dependent cross sections
    L. Witthauer, M. Dieterle, S. Abt, P. Achenbach, F. Afzal, Z. Ahmed, J.R.M. Annand, H.J. Arends, M. Bashkanov, R. Beck, M. Biroth, N.S. Borisov, A. Braghieri, W.J. Briscoe, F. Cividini, S. Costanza, C. Collicott, A. Denig, E.J. Downie, P. Drexler, M.I. Ferretti-Bondy, S. Gardner, S. Garni, D.I. Glazier, D. Glowa, W. Gradl, M. Guenther, G.M. Gurevich, D. Hamilton, D. Hornidge, G.M. Huber, A. Kaeser, V.L. Kashevarov, S. Kay, I. Keshelashvili, R. Kondratiev, M. Korolija, B. Krusche, A.B. Lazarev, J.M. Linturi, V. Lisin, K. Livingston, S. Lutterer, I.J.D. MacGregor, J. Mancell, D.M. Manley, P.P. Martel, V. Metag, W. Meyer, R. Miskimen, E. Mornacchi, A. Mushkarenkov, A.B. Neganov, A. Neiser, M. Oberle, M. Ostrick, P.B. Otte, D. Paudyal, P. Pedroni, A. Polonski, S.N. Prakhov, A. Rajabi, G. Reicherz, G. Ron, T. Rostomyan, A. Sarty, C. Sfienti, M.H. Sikora, V. Sokhoyan, K. Spieker, O. Steffen, I.I. Strakovski, Th. Strub, I. Supek, A. Thiel, M. Thiel, A. Thomas, M. Unverzagt, Yu.A. Usov, S. Wagner, N.K. Walford, D.P. Watts, D. Werthmueller, J. Wettig, M. Wolfes, and L. Zana
    Phys. Rev. Lett. 117 (2016) 132502
  2. The isospin structure of photoproduction of πη pairs from the nucleon in the threshold region
    A. Kaeser, J. Ahrens, J.R.M. Annand, H.J. Arends, K. Bantawa, P.A. Bartolome, R. Beck, V. Bekrenev, H. Berghaeuser, A. Braghieri, D. Branford, W.J. Briscoe, J. Brudvik, S. Cherepnya, S. Costanza, B. Demissie, M. Dieterle, E.J. Downie, P. Drexler, L.V. Filkov, A. Fix, D.I. Glazier, D Hamilton, E. Heid, D. Hornidge, D. Howdle, G.M. Huber, O. Jahn, I. Jaegle, T.C. Jude, V.L. Kashevarov, I. Keshelashvili, R. Kondratiev, M. Korolija, S.P. Kruglov, B. Krusche, V. Lisin, K. Livingston, I.J.D. MacGregor, Y. Maghrbi, J. Mancell, D.M. Manley, Z. Marinides, M. Martinez, J.C. McGeorge, E. McNicoll, D. Mekterovic, V. Metag, S. Micanovic, D.G. Middleton, A. Mushkarenkov, A. Nikolaev, R. Novotny, M. Oberle, M. Ostrick, P.Otte, B. Oussena, P. Pedroni, F. Pheron, A. Polonski, S.N. Prakhov, J. Robinson, G. Rosner, T. Rostomyan, S. Schumann, M.H. Sikora, D.I. Sober, A. Starostin, I. Supek, M. Thiel, A. Thomas, M. Unverzagt, D.P. Watts, D. Werthmueller, L. Witthauer
    Phys. Lett. B748 (2015) 244
  3. Production of η and η′ mesons on nucleons and nuclei
    B. Krusche and C. Wilkin
    Progress in Particle and Nuclear Physics 80 (2015)
  4. Photoproduction of π0 mesons off neutrons in the nucleon resonance region
    M. Dieterle, I. Keshelashvili, J. Ahrens, J.R.M. Annand, H.J. Arends, K. Bantawa, P.A. Bartolome, R. Beck, V. Bekrenev, A. Braghieri, D. Branford, W.J. Briscoe, J. Brudvik, S. Cherepnya, B. Demissie, E.J. Downie, P. Drexler, L.V. Fil'kov, A. Fix, D.I. Glazier, D. Hamilton, E. Heid, D. Hornidge, D. Howdle, G.M. Huber, I. Jaegle, O. Jahn, T.C. Jude, A. Kaeser, V.L. Kashevarov, R. Kondratiev, M. Korolija, S.P. Kruglov, B. Krusche, A. Kulbardis, V. Lisin, K. Livingston, I.J.D. MacGregor, Y. Maghrbi, J. Mancell, D.M. Manley, Z. Marinides, M. Martinez, J.C. McGeorge, E. McNicoll, D. Mekterovic, V. Metag, S. Micanovic, D.G. Middleton, A. Mushkarenkov, B.M.K. Nefkens, A. Nikolaev, R. Novotny, M. Oberle, M. Ostrick, B. Oussena, P. Pedroni, F. Pheron, A. Polonski, S.N. Prakhov, J. Robinson, G. Rosner, T. Rostomyan, S. Schumann, M.H. Sikora, D. Sober, A. Starostin, I. Supek, M. Thiel, A. Thomas, M. Unverzagt, D.P. Watts, D. Werthmueller, L. Witthauer 
    Phys. Rev. Lett. 112 (2014) 142001
  5. Narrow structure in the excitation function of η photoproduction off the neutron
    D. Werthmueller, L. Witthauer, I. Keshelashvili, P. Aguar-Bartolome, J. Ahrens, J.R.M. Annand, H.J. Arends, K. Bantawa, R. Beck, V. Bekrenev, A. Braghieri, D. Branford, W.J. Briscoe, J. Brudvik, S. Cherepnya, B. Demissie, M. Dieterle, E.J. Downie, P. Drexler, L.V. Fil'kov, A. Fix, D.I. Glazier, D. Hamilton, E. Heid, D Hornidge, D. Howdle, G.M. Huber, I. Jaegle, O. Jahn, T.C. Jude, A. Kaeser, V.L. Kashevarov, R. Kondratiev, M. Korolija, S.P. Kruglov, B. Krusche, A. Kulbardis, V. Lisin, K. Livingston, I.J.D. MacGregor, Y. Maghrbi, J. Mancell, D.M. Manley, Z. Marinides, M. Martinez, J.C. McGeorge, E.F. McNicoll, V. Metag, D.G. Middleton, A. Mushkarenkov, B.M.K. Nefkens, A. Nikolaev, R. Novotny, M. Oberle, M. Ostrick, B. Oussena, P. Pedroni,F. Pheron, A. Polonski, S.N. Prakhov, J. Robinson, G. Rosner, T. Rostomyan, S. Schumann, M.H. Sikora, D. Sober, A. Starostin, I. Supek, M. Thiel, A. Thomas, M. Unverzagt, D.P. Watts 
    Phys. Rev. Lett. 111 (2013) 232001
  6. Measurement of the beam-helicity asymmetry I⊙ in the photoproduction of π0-pairs off the proton and off the neutron
    M. Oberle, B. Krusche, J. Ahrens, J.R.M. Annand, H.J. Arends, K. Bantawa, P.A. Bartolome, R. Beck, V. Bekrenev, H. Berghaeuser, A. Braghieri, D. Branford, W.J. Briscoe, J. Brudvik, S. Cherepnya, B. Demissie, M. Dieterle, E.J. Downie, P. Drexler, L.V. Fil'kov, A. Fix, D.I. Glazier, E. Heid, D. Hornidge, D. Howdle, G.M. Huber, O. Jahn, I. Jaegle, T.C. Jude, A. Kaeser, V.L. Kashevarov, I. Keshelashvili, R. Kondratiev, M. Korolija, A. Kulbardis, S.P. Kruglov, V. Lisin, K. Livingston, I.J.D. MacGregor, Y. Maghrbi, J. Mancell, D.M. Manley, Z. Marinides, M. Martinez, J.C. McGeorge, E. McNicoll, D. Mekterovic, V. Metag, S. Micanovic, D.G. Middleton, A. Mushkarenkov, B.M.K. Nefkens, A. Nikolaev, R. Novotny, M. Ostrick, B. Oussena, P. Pedroni, F. Pheron, A. Polonski, S.N. Prakhov, J. Robinson, G. Rosner, T. Rostomyan, S. Schumann, M.H. Sikora, D.I. Sober, A. Starostin, I. Supek, M. Thiel, A. Thomas, M. Unverzagt, D.P. Watts, D. Werthmueller, L. Witthauer, F. Zehr
    Phys. Lett. B721 (2013) 237
  7. Coherent photoproduction of η-mesons off 3He – search for η-mesic nuclei
    F. Pheron, J. Ahrens, J.R.M. Annand, H.J. Arends, K. Bantawa, P.A. Bartolome, R. Beck, V. Bekrenev, H. Berghaeuser, B. Boillat, A. Braghieri, D. Branford, W.J. Briscoe, J. Brudvik, S. Cherepnya, B. Demissie, M. Dieterle, E.J. Downie, P. Drexler, D.I. Glazier, E. Heid, L.V. Fil'kov, D. Hornidge, D. Howdle, O. Jahn, I. Jaegle, T.C. Jude, V.L. Kashevarov, I. Keshelashvili, R. Kondratiev, M. Korolija, M. Kotulla, A. Kulbardis, S.P. Kruglov, B. Krusche, V. Lisin, K. Livingston, I.J.D. MacGregor, Y. Maghrbi, J. Mancell, D.M. Manley, Z. Marinides, M. Martinez, J.C. McGeorge, E. McNicoll, D. Mekterovic, V. Metag, S. Micanovic, D.G. Middleton, A. Mushkarenkov, B.M.K. Nefkens, A. Nikolaev, R. Novotny, M. Oberle, M. Ostrick, B. Oussena, P. Pedroni, A. Polonski, S.N. Prakhov, J. Robinson, G. Rosner, T. Rostomyan, S. Schumann, M.H. Sikora, D.I. Sober, A. Starostin, I. Supek, M. Thiel, A. Thomas, M. Unverzagt, D.P. Watts, D. Werthmueller, L. Witthauer, F. Zehr
    Phys. Lett. B 709 (2012) 21
  8. Photoproduction of mesons off nuclei
    B. Krusche
    Eur. Phys. J. Special Topics 198 (2011) 199
  9. Quasi-free photoproduction of η-mesons off 3He nuclei
    I. Jaegle, T. Mertens, A.V. Anisovich, J.C.S. Bacelar, B. Bantes, O. Bartholomy, D. Bayadilov, R. Beck, Y.A. Beloglazov, R. Castelijns, V. Crede, H. Dutz, A. Ehmanns, D. Elsner, K. Essig, R. Ewald, I. Fabry, M. Fuchs, C. Funke, R. Gothe, R. Gregor, A.B. Gridnev, E. Gutz, S. Hoeffgen, P. Hoffmeister, I. Horn, J. Junkersfeld, H. Kalinowsky, S. Kammer, V. Kleber, Frank Klein, Friedrich Klein, E. Klempt, M. Konrad, M. Kotulla, B. Krusche, M. Lang, J. Langheinrich, H. Loehner, I.V. Lopatin, J. Lotz, S. Lugert, D. Menze, J.G. Messchendorp, V. Metag, C. Morales, M. Nanova, V.A. Nikonov, D.V. Novinski, R. Novotny, M. Ostrick, L.M. Pant, H. van Pee, M. Pfeiffer, A.K. Radkov, A. Roy, A.V. Sarantsev, S. Schadmand, C. Schmidt, H. Schmieden, B. Schoch, S. Shende, V. Sokhoyan, A. Suele, V.V. Sumachev, T. Szczepanek, U. Thoma, D. Trnka, R. Varma, D. Walther, C. Weinheimer, C. Wendel
    Phys. Rev. Lett 100 (2008) 252002