skip to main content

DOE PAGESDOE PAGES

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
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)
Sponsoring Org:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
OSTI Identifier:
1328672