Quasi-free photoproduction of /em>-mesons off 3He nuclei

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• 作者：L. Witthauer (1)
  D. Werthmler (1)
  I. Keshelashvili (1)
  P. Aguar-Bartolom(2)
  J. Ahrens (2)
  J. R. M. Annand (3)
  H. J. Arends (2)
  K. Bantawa (4)
  R. Beck (2) (5)
  V. Bekrenev (6)
  A. Braghieri (7)
  D. Branford (8)
  W. J. Briscoe (9)
  J. Brudvik (10)
  S. Cherepnya (11)
  B. Demissie (9)
  M. Dieterle (1)
  E. J. Downie (2) (3) (9)
  P. Drexler (12)
  L. V. Filov (11)
  A. Fix (13)
  D. I. Glazier (8)
  D. Hamilton (3)
  E. Heid (2)
  D. Hornidge (14)
  D. Howdle (3)
  G. M. Huber (15)
  I. Jaegle (1)
  O. Jahn (2)
  T. C. Jude (8)
  A. Kser (1)
  V. L. Kashevarov (11) (2)
  R. Kondratiev (16)
  M. Korolija (17)
  S. P. Kruglov (6)
  B. Krusche (1)
  A. Kulbardis (6)
  V. Lisin (16)
  K. Livingston (3)
  I. J. D. MacGregor (3)
  Y. Maghrbi (1)
  J. Mancell (3)
  D. M. Manley (4)
  Z. Marinides (9)
  M. Martinez (2)
  J. C. McGeorge (3)
  E. McNicoll (3)
  V. Metag (12)
  D. G. Middleton (14)
  A. Mushkarenkov (7)
  B. M. K. Nefkens (10)
  A. Nikolaev (2) (5)
  R. Novotny (12)
  M. Oberle (1)
  M. Ostrick (2)
  B. Oussena (2) (9)
  P. Pedroni (7)
  F. Pheron (1)
  A. Polonski (16)
  S. Prakhov (10) (2) (9)
  J. Robinson (3)
  G. Rosner (3)
  M. Rost (2)
  T. Rostomyan (1)
  S. Schumann (2) (5)
  M. H. Sikora (8)
  D. Sober (18)
  A. Starostin (10)
  I. Supek (17)
  M. Thiel (12) (2)
  A. Thomas (2)
  M. Unverzagt (2) (5)
  D. P. Watts (8)
  
• 刊名：The European Physical Journal A - Hadrons and Nuclei
• 出版年：2013
• 出版时间：December 2013
• 年：2013
• 卷：49
• 期：12
• 全文大小：
• 作者单位：L. Witthauer (1)
  D. Werthmler (1)
  I. Keshelashvili (1)
  P. Aguar-Bartolom(2)
  J. Ahrens (2)
  J. R. M. Annand (3)
  H. J. Arends (2)
  K. Bantawa (4)
  R. Beck (2) (5)
  V. Bekrenev (6)
  A. Braghieri (7)
  D. Branford (8)
  W. J. Briscoe (9)
  J. Brudvik (10)
  S. Cherepnya (11)
  B. Demissie (9)
  M. Dieterle (1)
  E. J. Downie (2) (3) (9)
  P. Drexler (12)
  L. V. Filov (11)
  A. Fix (13)
  D. I. Glazier (8)
  D. Hamilton (3)
  E. Heid (2)
  D. Hornidge (14)
  D. Howdle (3)
  G. M. Huber (15)
  I. Jaegle (1)
  O. Jahn (2)
  T. C. Jude (8)
  A. Kser (1)
  V. L. Kashevarov (11) (2)
  R. Kondratiev (16)
  M. Korolija (17)
  S. P. Kruglov (6)
  B. Krusche (1)
  A. Kulbardis (6)
  V. Lisin (16)
  K. Livingston (3)
  I. J. D. MacGregor (3)
  Y. Maghrbi (1)
  J. Mancell (3)
  D. M. Manley (4)
  Z. Marinides (9)
  M. Martinez (2)
  J. C. McGeorge (3)
  E. McNicoll (3)
  V. Metag (12)
  D. G. Middleton (14)
  A. Mushkarenkov (7)
  B. M. K. Nefkens (10)
  A. Nikolaev (2) (5)
  R. Novotny (12)
  M. Oberle (1)
  M. Ostrick (2)
  B. Oussena (2) (9)
  P. Pedroni (7)
  F. Pheron (1)
  A. Polonski (16)
  S. Prakhov (10) (2) (9)
  J. Robinson (3)
  G. Rosner (3)
  M. Rost (2)
  T. Rostomyan (1)
  S. Schumann (2) (5)
  M. H. Sikora (8)
  D. Sober (18)
  A. Starostin (10)
  I. Supek (17)
  M. Thiel (12) (2)
  A. Thomas (2)
  M. Unverzagt (2) (5)
  D. P. Watts (8)
  
  1. Department of Physics, University of Basel, CH-4056, Basel, Switzerland
  2. Institut f Kernphysik, University of Mainz, D-55099, Mainz, Germany
  3. School of Physics and Astronomy, University of Glasgow, G12 8QQ, Glasgow, UK
  4. Kent State University, 44242, Kent, Ohio, USA
  5. Helmholtz-Institut f Strahlen- und Kernphysik, University of Bonn, D-53115, Bonn, Germany
  6. Petersburg Nuclear Physics Institute, RU-188300, Gatchina, Russia
  7. INFN, I-27100, Pavia, Italy
  8. School of Physics, University of Edinburgh, EH9 3JZ, Edinburgh, UK
  9. Institute for Nuclear Studies, The George Washington University, 20052, Washington, DC, USA
  10. University of California Los Angeles, 90095-1547, Los Angeles, California, USA
  11. Lebedev Physical Institute, RU-119991, Moscow, Russia
  12. II. Physikalisches Institut, University of Giessen, D-35392, Giessen, Germany
  13. Laboratory of Mathematical Physics, Tomsk Polytechnic University, Tomsk, Russia
  14. Mount Allison University, E4L 1E6, Sackville, Canada
  15. University of Regina, SK S4S-0A2, Regina, Canada
  16. Institute for Nuclear Research, RU-125047, Moscow, Russia
  17. Rudjer Boskovic Institute, HR-10000, Zagreb, Croatia
  18. The Catholic University of America, 20064, Washington, DC, USA
  
• ISSN：1434-601X

文摘

Quasi-free photoproduction of mesons has been measured off nucleons bound in 3He nuclei for incident photon energies from the threshold region up to 1.4 GeV. The experiment was performed at the tagged photon facility of the Mainz MAMI accelerator with an almost 4covering electromagnetic calorimeter, combining the TAPS and Crystal Ball detectors. The mesons were detected in coincidence with the recoil nucleons. This allowed a comparison of the production cross section off quasi-free protons and quasi-free neutrons and a full kinematic reconstruction of the final state, eliminating effects from nuclear Fermi motion. In the S11(1535) resonance peak, the data agree with the neutron/proton cross section ratio extracted from measurements with deuteron targets. More importantly, the prominent structure observed in photoproduction off quasi-free neutrons bound in the deuteron is also clearly observed. Its parameters (width, strength) are consistent with the expectations from the deuteron results. On an absolute scale the cross sections for both quasi-free protons and neutrons are suppressed with respect to the deuteron target pointing to significant nuclear final-state interaction effects.