Photoproduction of Neutral Pions off Protons

TAPS Collaboration; V. Crede; N. Sparks; A. Wilson; A. V. Anisovich; J. C. S. Bacelar; R. Bantes; O. Bartholomy; D. Bayadilov; R. Beck; Y. A. Beloglazov; R. Castelijns; H. Dutz; D. Elsner; R. Ewald; F. Frommberger; Chr. Funke; R. Gregor; A. Gridnev; E. Gutz; W. Hillert; P. Hoffmeister; I. Jaegle; J. Junkersfeld; H. Kalinowsky; S. Kammer; Frank Klein; Friedrich Klein; E. Klempt; M. Kotulla; B. Krusche; H. Loehner; I. V. Lopatin; S. Lugert; D. Menze; T. Mertens; J. G. Messchendorp; V. Metag; M. Nanova; V. A. Nikonov; D. Novinski; R. Novotny; M. Ostrick; L. M. Pant; H. van Pee; M. Pfeiffer; A. Roy; A. V. Sarantsev; S. Schadmand; C. Schmidt

doi:10.1103/PhysRevC.84.055203

Photoproduction of Neutral Pions off Protons

Nuclear Experiment 2012-08-27 v2 High Energy Physics - Experiment High Energy Physics - Phenomenology

Authors: TAPS Collaboration , V. Crede , N. Sparks , A. Wilson , A. V. Anisovich , J. C. S. Bacelar , R. Bantes , O. Bartholomy , D. Bayadilov , R. Beck , Y. A. Beloglazov , R. Castelijns , H. Dutz , D. Elsner , R. Ewald , F. Frommberger , Chr. Funke , R. Gregor , A. Gridnev , E. Gutz , W. Hillert , P. Hoffmeister , I. Jaegle , J. Junkersfeld , H. Kalinowsky , S. Kammer , Frank Klein , Friedrich Klein , E. Klempt , M. Kotulla , B. Krusche , H. Loehner , I. V. Lopatin , S. Lugert , D. Menze , T. Mertens , J. G. Messchendorp , V. Metag , M. Nanova , V. A. Nikonov , D. Novinski , R. Novotny , M. Ostrick , L. M. Pant , H. van Pee , M. Pfeiffer , 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 , Ch. Wendel

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Abstract

Photoproduction of neutral pions has been studied with the CBELSA/TAPS detector in the reaction $\gamma p\to p\pi^0$ for photon energies between 0.85 and 2.50 GeV. The $\pi^0$ mesons are observed in their dominant neutral decay mode: $\pi^0\to\gamma\gamma$ . For the first time, the differential cross sections cover the very forward region, $\theta_{\rm c.m.}<60^\circ$ . A partial-wave analysis of these data within the Bonn-Gatchina framework observes the high-mass resonances $G_{17}$ (2190), $D_{13}$ (2080), and $D_{15}$ (2070).

Keywords

neutral pion photoproduction differential cross sections CBELSA/TAPS detector partial-wave analysis Bonn-Gatchina framework high-mass resonances proton target

Cite

@article{arxiv.1107.2151,
  title  = {Photoproduction of Neutral Pions off Protons},
  author = {TAPS Collaboration and V. Crede and N. Sparks and A. Wilson and A. V. Anisovich and J. C. S. Bacelar and R. Bantes and O. Bartholomy and D. Bayadilov and R. Beck and Y. A. Beloglazov and R. Castelijns and H. Dutz and D. Elsner and R. Ewald and F. Frommberger and Chr. Funke and R. Gregor and A. Gridnev and E. Gutz and W. Hillert and P. Hoffmeister and I. Jaegle and J. Junkersfeld and H. Kalinowsky and S. Kammer and Frank Klein and Friedrich Klein and E. Klempt and M. Kotulla and B. Krusche and H. Loehner and I. V. Lopatin and S. Lugert and D. Menze and T. Mertens and J. G. Messchendorp and V. Metag and M. Nanova and V. A. Nikonov and D. 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. 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 Ch. Wendel},
  journal= {arXiv preprint arXiv:1107.2151},
  year   = {2012}
}

Comments

12 pages, 9 figures, minor modifications to PWA section

Photoproduction of Neutral Pions off Protons

Abstract

Keywords

Cite

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