Article révisé par les pairs
| Résumé : | Performances of the Very Forward Proton Spectrometer (VFPS) of the H1 detector at HERA using data collected during the 2006/2007 running period are discussed, including the description of acceptance, reconstruction of proton energy loss and estimation of the amount of the beam-gas background. The first physics result obtained with the VFPS detector - A preliminary measurement of the semi-inclusive reduced cross section,σD(3) r (Q2;β;xP) - is presented for the diffractive deep inelastic scattering process ep→eX p with the leading final state proton measured by the VFPS. Results of this measurement are found to be in agreement with other σD(3) r measurements by the H1 Collaboration and with a theoretical prediction based on a NLO DGLAP QCD fit. They provide a higher precision and therefore allow a deeper inside to the nature of diffraction. © Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike Licence. |
