Photoproduction of $\eta '$-mesons off the deuteron
Abstract
Quasi-free photoproduction of mesons off nucleons bound in the deuteron has been measured with the combined Crystal Barrel - TAPS detector. The experiment was done at a tagged photon beam of the ELSA electron accelerator in Bonn for incident photon energies from the production threshold up to 2.5 GeV. The -mesons have been detected in coincidence with recoil protons and recoil neutrons. The quasi-free proton data are in good agreement with the results for free protons, indicating that nuclear effects have no significant impact. The coincidence with recoil neutrons provides the first data for the reaction. In addition, also first estimates for coherent -production off the deuteron have been obtained. In agreement with model predictions, the total cross section for this channel is found to be very small, at most at the level of a few nb. The data are compared to model calculations taking into account contributions from nucleon resonances and -channel exchanges.
Keywords
Cite
@article{arxiv.1012.1021,
title = {Photoproduction of $\eta '$-mesons off the deuteron},
author = {I. Jaegle and T. Mertens and A. Fix and F. Huang and K. Nakayama and L. Tiator and A. V. Anisovich and J. C. S. Bacelar and B. Bantes and O. Bartholomy and D. E. Bayadilov and R. Beck and Y. A. Beloglazov and R. Castelijns and V. Crede and H. Dutz and D. Elsner and R. Ewald and F. Frommberger and C. Funke and R. Gregor and A. B. Gridnev and E. Gutz and W. Hillert and S. Hoeffgen and J. Junkersfeld and H. Kalinowsky and S. Kammer and V. Kleber and Frank Klein and Friedrich Klein and E. Klempt and M. Kotulla and B. Krusche and M. Lang and H. Loehner and I. V. Lopatin and S. Lugert and D. Menze and J. G. Messchendorp and V. Metag and V. A. Nikonov and M. Nanova and D. V. Novinski and R. Novotny and M. Ostrick and L. M. Pant and H. van Pee and M. Pfeiffer and A. Roy and A. V. Sarantsev and S. Schadmand and C. Schmidt and H. Schmieden and B. Schoch and S. V. Shende and V. Sokhoyan and A. Suele and V. V. Sumachev and T. Szczepanek and U. Thoma and D. Trnka and R. Varma and D. Walther and C. Wendel},
journal= {arXiv preprint arXiv:1012.1021},
year = {2015}
}
Comments
Accepted for publication in Eur. Phys. J. A