2001/05/16 by A. Donnachie, A Donnachie, P.V. Landshoff +1 · 5 citations
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ex #hep-ph
paper · pdf · doi:10.1016/s0370-2693(01)01048-6
published as Phys.Lett. B518 (2001) 63-71 · 11 pages, plain tex, with 10 figures embedded using epsf. (Spurious figure removed.)
arxiv created 2001/05/16 · openalex publication_date 2001/10/01 · arxiv updated 2009/11/30 · openalex created_date 2020/11/23 · openalex updated_date 2026/07/28
New structure-function data are in excellent agreement with the existence of a hard pomeron, with intercept about 1.4. It gives a very economical description of the data. Having fixed 2 parameters from the data for the real-photon cross section σγp, we need just 5 further parameters to fit the data for F2(x,Q2) with x≤ 0.001. The available data range from Q2=0.045 to 35 GeV2. With guesses consistent with dimensional counting for the x dependences of our three separate terms, the fit extends well to larger x and to Q2=5000 GeV2. With no additional parameters, it gives a good description of data for the charm structure function F2c(x,Q2) from Q2=0 to 130 GeV2. The two pomerons also give a good description of both the W and the t dependence of γp→ J/ψp.