Diffractive dijet photoproduction in ep collisions at HERA

• Verfasst von: Aaron, Francisc Dionisie [VerfasserIn]
• Verfasst von: Pirumov, Hayk [VerfasserIn]
• Verfasst von: Sauter, Michel David [VerfasserIn]
• Verfasst von: Schöning, André [VerfasserIn]
• Verfasst von: Schultz-Coulon, Hans-Christian [VerfasserIn]
• Titel: Diffractive dijet photoproduction in ep collisions at HERA
• Körperschaft: H1 Collaboration [VerfasserIn]
• Verf.angabe: The H1 Collaboration*
• E-Jahr: 2010
• Jahr: 05 October 2010
• Umfang: 22 S.
• Fussnoten: *The H1 Collaboration: F.D. Aaron, H. Pirumov, M. Sauter, A. Schöning, H.-C. Schultz-Coulon [und 215 weitere Personen] ; Gesehen am 15.11.2022
• Titel Quelle: Enthalten in: The European physical journal / C
• Ort Quelle: Berlin : Springer, 1998
• Jahr Quelle: 2010
• Band/Heft Quelle: 70(2010), Seite 15-37
• ISSN Quelle: 1434-6052
• DOI: doi:10.1140/epjc/s10052-010-1448-6
• Datenträger: Online-Ressource
• Sprache: eng
• Sach-SW: Diffractive Dijet
• Sach-SW: Dijet Cross Section
• Sach-SW: Monte Carlo
• Sach-SW: Resolve Photon Contribution
• Sach-SW: ZEUS Collaboration
• K10plus-PPN: 182249284X

Abstract

Measurements are presented of single and double-differential dijet cross sections in diffractive photoproduction based on a data sample with an integrated luminosity of 47 pb−1. The events are of the type ep→eXY, where the hadronic system X contains at least two jets and is separated by a large rapidity gap from the system Y, which consists of a leading proton or low-mass proton excitation. The dijet cross sections are compared with QCD calculations at next-to-leading order and with a Monte Carlo model based on leading order matrix elements with parton showers. The measured cross sections are smaller than those obtained from the next-to-leading order calculations by a factor of about 0.6. This suppression factor has no significant dependence on the fraction xγof the photon four-momentum entering the hard subprocess. Ratios of the diffractive to the inclusive dijet cross sections are measured for the first time and are compared with Monte Carlo models.