Publication
Title
Measurement of the diffractive longitudinal structure function $F_{L}^{D}$ at HERA
Author
Institution/Organisation
H1 Collaboration
Abstract
 First measurements are presented of the diffractive cross section σ ep→eXY at centre-of-mass energies s of 225 and 252GeV, together with a precise new measurement at s of 319GeV , using data taken with the H1 detector in the years 2006 and 2007. Together with previous H1 data at s of 301GeV , the measurements are used to extract the diffractive longitudinal structure function FLD in the range of photon virtualities 40Q2440GeV2 and fractional proton longitudinal momentum loss 5×10−4≤x ℙ≤3×10−3. The measured FLD is compared with leading twist predictions based on diffractive parton densities extracted in NLO QCD fits to previous measurements of diffractive Deep-Inelastic Scattering and with a model which additionally includes a higher twist contribution derived from a colour dipole approach. The ratio of the diffractive cross section induced by longitudinally polarised photons to that for transversely polarised photons is extracted and compared with the analogous quantity for inclusive Deep-Inelastic Scattering.
Language
English
Source (journal)
European physical journal : C : particles and fields. - Berlin
Publication
Berlin : 2011
ISSN
1434-6044
1434-6052
Volume/pages
71 :12 (2011) , p. 1836,1-1836,21
Article Reference
1836
ISI
000298347800024
Medium
E-only publicatie
Full text (Publisher's DOI)
Full text (publisher's version - intranet only)
UAntwerpen
 Faculty/Department Research group Publication type Subject Affiliation Publications with a UAntwerp address