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Diffractive structure functions in nuclei
| Content Provider | Semantic Scholar |
|---|---|
| Author | Lappi, Tuomas Kowalski, Henri Marquet, Cyrille Venugopalan, Raju |
| Copyright Year | 2009 |
| Abstract | The large fraction of diffractive events observed at HERA shows that modern colliders are approaching the nonlinear regime of QCD, where gluon saturation and unitarization effects become important. In Deep Inelastic Scattering (DIS) on nuclei the nonlinear effects are enhanced by the possibility of interacting coherently with several nucleons simultaneously [2]. There are plans for several facilities capable of high energy nuclear DIS experiments, as the EIC [3] and LHeC [4] colliders. Due to the difficulty in measuring an intact recoil nucleus deflected by a small angle, diffractive eA collisions present an experimental challenge. But if they are successful, nuclear diffractive DIS (DDIS) would provide a good test of our understanding of high energy QCD. In the high energy limit DIS is best understood in the dipole frame, where the incoming virtual photon fluctuates into a quark-antiquark pair which then interacts with the target. The scattering amplitude is related to the correlator of two Wilson lines in the wavefunction of the nucleus. In contrast to the language of collinearly factorized parton distribution functions, in this formalism both inclusive and diffractive observables can be calculated from the same universal dipole cross section. This enables one to naturally use the dipole cross sections fitted to one process to predict observables in another one. In this talk we will review the results of our recent work [5] to apply this ideology to computing nuclear diffractive structure functions. Our emphasis is not on the most recent developments of high energy evolution equations, but the effects of a more realistic and consistent impact parameter dependence. This will lead us to discuss, in addition to the consequences of nuclear geometry on diffractive observables, the importance of the proton impact parameter profile used in the calculations. In this paper we shall first describe the dipole cross sections and calculation methods used and then summarize our results for nuclear DDIS. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://arxiv.org/pdf/0906.3637v1.pdf |
| Language | English |
| Access Restriction | Open |
| Subject Keyword | Cell Nucleus Computation (action) Cross section (geometry) Cross-correlation Earth inductor compass Epstein Barr virus early restricted Ab:Titr:Pt:Ser:Qn Experiment Interaction Limbo Nonlinear system Nucleons Observable Photons Population Parameter Protons Seizures Semantics (computer science) Serous Endometrial Intraepithelial Carcinoma collision |
| Content Type | Text |
| Resource Type | Article |
