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Title: The impact of new polarization data from Bonn, Mainz and Jefferson Laboratory on $$\gamma p \rightarrow \pi N$$ multipoles

New data on pion-photoproduction off the proton have been included in the partial wave analyses Bonn-Gatchina and SAID and in the dynamical coupled-channel approach Julich-Bonn. All reproduce the recent new data well: the double polarization data for E, G, H, P and T in $$\gamma p \to \pi^0 p$$ from ELSA, the beam asymmetry $$\Sigma$$ for $$\gamma p \to \pi^0 p$$ and $$\pi^+ n$$ from Jefferson Laboratory, and the precise new differential cross section and beam asymmetry data $$\Sigma$$ for $$\gamma p \to \pi^0 p$$ from MAMI. The new fit results for the multipoles are compared with predictions not taking into account the new data. Lastly, the mutual agreement is improved considerably but still far from being perfect.
Authors:
 [1] ;  [2] ;  [3] ;  [2] ;  [2] ;  [4] ;  [2] ;  [2] ;  [4] ;  [2] ;  [1] ;  [3] ;  [2] ;  [4] ;  [2] ;  [3] ;  [2] ;  [5]
  1. Univ. Bonn, Bonn (Germany); NRS "Kurchatov Institute", PNPI, Gatchina (Russia)
  2. Univ. Bonn, Bonn (Germany)
  3. George Washington Univ., Washington, DC (United States)
  4. Institut fur Kernphysik der Univ. Mainz, Mainz (Germany)
  5. Univ. Bonn, Bonn (Germany); Forschungszentrum Julich, Julich (Germany)
Publication Date:
Report Number(s):
JLAB-THY-16-2317; DOE/OR/23177-3908; arXiv:1604.05704
Journal ID: ISSN 1434-6001; PII: 652; TRN: US1700161
Grant/Contract Number:
AC05-06OR23177; SC0016583; FG02-99ER41110; PHY 1415459; 1452055; 2015VMA076; 16-12-10267
Type:
Accepted Manuscript
Journal Name:
European Physical Journal. A
Additional Journal Information:
Journal Volume: 52; Journal Issue: 9; Journal ID: ISSN 1434-6001
Publisher:
Springer
Research Org:
Thomas Jefferson National Accelerator Facility, Newport News, VA (United States); George Washington Univ., Washington, DC (United States)
Sponsoring Org:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26); National Science Foundation (NSF); German Research Foundation (DFG)
Contributing Orgs:
A2 Collaboration at MAMI
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 73 NUCLEAR PHYSICS AND RADIATION PHYSICS; coupled channel analyses
OSTI Identifier:
1328672
Alternate Identifier(s):
OSTI ID: 1439594

Anisovich, A. V., Beck, R., Döring, M., Gottschall, M., Hartmann, J., Kashevarov, V., Klempt, E., Nikonov, V., Ostrick, M., Ronchen, D., Sarantsev, A., Strakovsky, I., Thiel, A., Tiator, L., Thoma, U., Workman, R., Wunderlich, Y., and MeiBner, Ulf -G.. The impact of new polarization data from Bonn, Mainz and Jefferson Laboratory on $\gamma p \rightarrow \pi N$ multipoles. United States: N. p., Web. doi:10.1140/epja/i2016-16284-9.
Anisovich, A. V., Beck, R., Döring, M., Gottschall, M., Hartmann, J., Kashevarov, V., Klempt, E., Nikonov, V., Ostrick, M., Ronchen, D., Sarantsev, A., Strakovsky, I., Thiel, A., Tiator, L., Thoma, U., Workman, R., Wunderlich, Y., & MeiBner, Ulf -G.. The impact of new polarization data from Bonn, Mainz and Jefferson Laboratory on $\gamma p \rightarrow \pi N$ multipoles. United States. doi:10.1140/epja/i2016-16284-9.
Anisovich, A. V., Beck, R., Döring, M., Gottschall, M., Hartmann, J., Kashevarov, V., Klempt, E., Nikonov, V., Ostrick, M., Ronchen, D., Sarantsev, A., Strakovsky, I., Thiel, A., Tiator, L., Thoma, U., Workman, R., Wunderlich, Y., and MeiBner, Ulf -G.. 2016. "The impact of new polarization data from Bonn, Mainz and Jefferson Laboratory on $\gamma p \rightarrow \pi N$ multipoles". United States. doi:10.1140/epja/i2016-16284-9. https://www.osti.gov/servlets/purl/1328672.
@article{osti_1328672,
title = {The impact of new polarization data from Bonn, Mainz and Jefferson Laboratory on $\gamma p \rightarrow \pi N$ multipoles},
author = {Anisovich, A. V. and Beck, R. and Döring, M. and Gottschall, M. and Hartmann, J. and Kashevarov, V. and Klempt, E. and Nikonov, V. and Ostrick, M. and Ronchen, D. and Sarantsev, A. and Strakovsky, I. and Thiel, A. and Tiator, L. and Thoma, U. and Workman, R. and Wunderlich, Y. and MeiBner, Ulf -G.},
abstractNote = {New data on pion-photoproduction off the proton have been included in the partial wave analyses Bonn-Gatchina and SAID and in the dynamical coupled-channel approach Julich-Bonn. All reproduce the recent new data well: the double polarization data for E, G, H, P and T in $\gamma p \to \pi^0 p$ from ELSA, the beam asymmetry $\Sigma$ for $\gamma p \to \pi^0 p$ and $\pi^+ n$ from Jefferson Laboratory, and the precise new differential cross section and beam asymmetry data $\Sigma$ for $\gamma p \to \pi^0 p$ from MAMI. The new fit results for the multipoles are compared with predictions not taking into account the new data. Lastly, the mutual agreement is improved considerably but still far from being perfect.},
doi = {10.1140/epja/i2016-16284-9},
journal = {European Physical Journal. A},
number = 9,
volume = 52,
place = {United States},
year = {2016},
month = {9}
}