Diffractive dijet photoproduction in ep collisions at HERA
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 - GT 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 x (gamma) of 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.
Source:
European Physical Journal C. Particles and Fields, 2010, 70, 1-2, 15-37Funding / projects:
- Helmholtz Association (HGF) [VH-NG-401], Bundesministerium fur Bildung und Forschung, FRG [05H09GUF, 05H09VHC, 05H09VHF, 05H16PEA], UK Science and Technology Facilities Council, UK Particle Physics and Astronomy Research Council, FNRS-FWO-Vlaanderen, IISN-IIKW, IWT, Interuniversity Attraction Poles Programme, Belgian Science Policy, Polish Ministry of Science and Higher Education [DPN/N168/DESY/2009], Deutsche Forschungsgemeinschaft, VEGA SR [2/7062/27], Swedish Natural Science Research Council, Ministry of Education of the Czech Republic [LC527, INGO-1P05LA259, MSM0021620859], Swiss National Science Foundation, CONACYT, Mexico [48778-F], Russian Foundation for Basic Research (RFBR) [1329.2008.2], European Social Fund, (EPEAEK II)-PYTHAGORAS II, Romanian National Authority for Scientific Research [PN 09370101]
DOI: 10.1140/epjc/s10052-010-1448-6
ISSN: 1434-6044
WoS: 000284423800003
Scopus: 2-s2.0-78449289477
Collections
Institution/Community
VinčaTY - JOUR AU - Aaron, F. D. AU - Božović-Jelisavčić, Ivanka AU - Mudrinić, Mihajlo AU - Pandurović, Mila AU - Smiljanić, Ivan PY - 2010 UR - https://vinar.vin.bg.ac.rs/handle/123456789/4151 AB - 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 - GT 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 x (gamma) of 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. T2 - European Physical Journal C. Particles and Fields T1 - Diffractive dijet photoproduction in ep collisions at HERA VL - 70 IS - 1-2 SP - 15 EP - 37 DO - 10.1140/epjc/s10052-010-1448-6 ER -
@article{ author = "Aaron, F. D. and Božović-Jelisavčić, Ivanka and Mudrinić, Mihajlo and Pandurović, Mila and Smiljanić, Ivan", year = "2010", 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 - GT 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 x (gamma) of 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.", journal = "European Physical Journal C. Particles and Fields", title = "Diffractive dijet photoproduction in ep collisions at HERA", volume = "70", number = "1-2", pages = "15-37", doi = "10.1140/epjc/s10052-010-1448-6" }
Aaron, F. D., Božović-Jelisavčić, I., Mudrinić, M., Pandurović, M.,& Smiljanić, I.. (2010). Diffractive dijet photoproduction in ep collisions at HERA. in European Physical Journal C. Particles and Fields, 70(1-2), 15-37. https://doi.org/10.1140/epjc/s10052-010-1448-6
Aaron FD, Božović-Jelisavčić I, Mudrinić M, Pandurović M, Smiljanić I. Diffractive dijet photoproduction in ep collisions at HERA. in European Physical Journal C. Particles and Fields. 2010;70(1-2):15-37. doi:10.1140/epjc/s10052-010-1448-6 .
Aaron, F. D., Božović-Jelisavčić, Ivanka, Mudrinić, Mihajlo, Pandurović, Mila, Smiljanić, Ivan, "Diffractive dijet photoproduction in ep collisions at HERA" in European Physical Journal C. Particles and Fields, 70, no. 1-2 (2010):15-37, https://doi.org/10.1140/epjc/s10052-010-1448-6 . .