|
|||||
|
|
Experimental check of the Gerasimov-Drell-Hearn sum rule for 1H |
|
| Authors: | Dutz H Helbing K Krimmer J Speckner T Zeitler G Ahrens J Altieri S Annand J R M Anton G Arends H-J Beck R Bock A Bradtke C Braghieri A v Drachenfels W Frommberger F Godo M Goertz S Grabmayr P Hasegawa S Hansen K Harmsen J Heid E Hillert W Holvoet H Horikawa N Iwata T Hoorebeke L Van D'Hose N Jennewein P Kiel B Klein F Kondratiev R Lang M Lannoy B Leukel R Lisin V Menze D Meyer W Michel T Naumann J Panzeri A Pedroni P Pinelli T Preobrajenski I Radtke E Reicherz G Rohlof C Rostomyan T Sauer M Schoch B Schumacher M Tamas G Thomas A van de Vyver R Weihofen W Zapadtka F;GDH Collaboration |
| Institution: | Physikalisches Institut, Universit?t Bonn, D-53115 Bonn, Germany. |
| Abstract: | For the first time we checked the fundamental Gerasimov-Drell-Hearn (GDH) sum rule for the proton experimentally in the photon energy range from 0.2-2.9 GeV with the tagged photon facilities at MAMI (Mainz) and ELSA (Bonn). New data of the doubly polarized total cross section difference are presented in the energy range from 1.6 to 2.9 GeV. The contribution to the GDH integral from 0.2-2.9 GeV yields 254+/-5(stat)+/-12(syst)] microb with negative contributions in the Regge regime at photon energies above 2.1 GeV. This trend supports the validity of the GDH sum rule. |
| Keywords: | |
| 本文献已被 PubMed 等数据库收录！ | |