par Ahmed, T;Marage, Pierre ;Favart, Laurent ; [et al.]
Référence Physics letters. Section B, 299, page (374-384)
Publication Publié, 1993
Article révisé par les pairs
Résumé : We present first results on the total photoproduction cross section measurement with the H1 detector at HERA. The data were extracted from low Q2 collisions of 26.7 GeV electrons with 820 GeV protons. The γp total cross section has been measured by two independent methods in the γp center of mass energy range from 90 to 290 GeV. For an average center of mass energy of 195 GeV a value of σtot (γp) = 159 ± 7 (stat.) ± 20 (syst.) μb was obtained. © 1993.