Leading twist nuclear shadowing and suppression of hard coherent diffraction in proton-nucleus scattering
arXiv:hep-ph/0507310 · doi:10.1103/PhysRevC.75.045208
Abstract
We use the Glauber-Gribov multiple scattering formalism and the theory of leading twist nuclear shadowing to develop a method for the calculation of leading twist hard coherent diffraction in hadron-nucleus processes. We demonstrate that soft multiple rescatterings lead to the factorization breaking of hard diffraction in proton-nucleus scattering, which is larger than in hadron-nucleon scattering. At the LHC and RHIC kinematics, we compare the hard diffractive to e.m.~mechanisms of hard coherent production of two jets in proton-nucleus scattering. We study the x_{\Pomeron}, βand A-dependence of the ratio of the dijet production cross sections due to the two effects, R. We demonstrate that in proton-heavy nucleus hard coherent diffraction at the LHC, R is small, which offers a clean method to study hard photon-proton scattering at the energies exceeding the HERA energies by the factor of ten. On the other hand, the use of lighter nuclei, such as Ca-40, will allow to study the screened nuclear diffractive parton distribution. Moreover, a comparison of the dijet diffractive production to the heavy-quark-jet diffractive production will estimate the screened nuclear diffractive gluon PDF, which will be measured in nucleus-nucleus ultraperipheral collisions at the LHC.
arXiv comment25 pages, 11 figures, LaTeX. It is a significantly revised and extended version of our original preprint. The calculation of leading twist nuclear shadowing is based on the most recent H1 diffractive fits
References in corpus (21)
- Global QCD Analysis of Parton Structure of the Nucleon: CTEQ5 Parton Distributions
- Total cross sections
- Physics of Ultra-Peripheral Nuclear Collisions
- Coherent gamma-gamma and gamma-A interactions in very peripheral collisions at relativistic ion colliders
- Proof of Factorization for Diffractive Hard Scattering
- Measurement and QCD Analysis of the Diffractive Deep-Inelastic Scattering Cross Section at HERA
- Inclusive Measurement of Diffractive Deep-inelastic ep Scattering
- Diffractive Deep-Inelastic Scattering with a Leading Proton at HERA
- Probabilities of rapidity gaps in high energy interactions
- HERA Collider Physics
- POMERON FLUX RENORMALIZATION IN SOFT AND HARD DIFFRACTION
- Leading twist nuclear shadowing: uncertainties, comparison to experiments and higher twist effects
- Dijet photoproduction at HERA and the structure of the photon
- Proton-nucleus scattering and cross section fluctuations at RHIC and LHC
- Diffractive Jet Production in Deep-Inelastic e^+p Collisions at HERA
- Probing small parton densities in ultraperipheral and collisions at the LHC
- Evidence for Color Fluctuations in Hadrons from Coherent Nuclear Diffraction}
- Leading twist coherent diffraction on nuclei in deep inelastic scattering at small x and nuclear shadowing
- Color coherent phenomena on nuclei and the QCD evolution equation
- Evidence for Factorization Breaking in Diffractive Low-Q^2 Dijet Production
- Hadronic cross-section fluctuations and proton coherent diffractive dissociation on helium
Cited by in corpus (4)
- Leading twist nuclear shadowing phenomena in hard processes with nuclei
- Diffractive dijet photoproduction in ultraperipheral collisions at the LHC in next-to-leading order QCD
- Coherent and incoherent diffractive hadron production in pA collisions and gluon saturation
- From RHIC to EIC: Nuclear Structure Functions