Impact parameter dipole saturation model
By H. Kowalski, D. Teaney. 2003
381 citations recorded by the source corpus.
We develop a dipole model for DESY HERA deep inelastic scattering data which incorporates the impact parameter distribution of the proton. The model describes the inclusive total ${\ensuremath{\gamma}}^{*}p$ cross sections as well as the diffractive $J/\ensuremath{\psi}$ differential cross sections. We compare the model with previous approaches and show that the t distributions are sensitive to saturation phenomena. We estimate the boundary of the saturation region and show that it dominates the data in the low-${Q}^{2}$ region where the total ${\ensuremath{\gamma}}^{*}p$ cross section exhibits the same universal rise as hadronic cross sections. The model is then extended to nuclei and shows good agreement with the nuclear shadowing data at small x. Finally, we estimate the saturation scale in nuclei.
Subfields: Nuclear and High Energy Physics
View Paper: https://www.semanticscholar.org/paper/bc5c656cf0b929b2057386d68bc4c68f3367d226
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In Nuclear and High Energy Physics
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Citations in the corpus
- Collinearly-improved BK evolution meets the HERA data (2015, background): “Such extensions required more elaborated versions of the dipole model, including impact parameter dependence [24–27] and heavy quarks [25,28].”
- A Large Hadron Electron Collider at CERN: Report on the Physics and Design Concepts for Machine and Detector (2012, methodology): “39) are compared with the “b-sat” [276, 277] and bCGC [453] dipole models.”
- Relativistic Fluid Dynamics in and out of Equilibrium (2017, methodology): “To start the evolution, a seed function f ( x,Q ) at some fiducial scale Q = Q0 is needed, which is obtained by a fit to data from the HERA experiment using the so-called IP-Sat model [267]:”
- Nonlinear QCD meets data: A global analysis of lepton-proton scattering with running coupling Balitsky-Kovchegov evolution (2009, background): “Very succinctly, some of these works [29] incorporated features of BFKL dynamics and explicit impact parameter dependence in the scattering amplitude [30,32,33], whereas [39] focused in including DGLAP evolution into the model, which resulted in a improved fit to the higher Q(2) data.”