Exclusive diffractive processes at HERA within the dipole picture

By H. Kowalski, L. Motyka, Graeme Watt. 2006

379 citations recorded by the source corpus.

We present a simultaneous analysis, within an impact parameter dependent saturated dipole model, of exclusive diffractive vector meson ($J/\ensuremath{\psi}$, $\ensuremath{\phi}$, and $\ensuremath{\rho}$) production, deeply virtual Compton scattering and the total ${\ensuremath{\gamma}}^{*}p$ cross section data measured at HERA. Various cross sections measured as a function of the kinematic variables ${Q}^{2}$, $W$ and $t$ are well described, with little sensitivity to the details of the vector meson wave functions. We determine the properties of the gluon density in the proton in both longitudinal and transverse dimensions, including the impact parameter dependent saturation scale. The overall success of the description indicates universality of the emerging gluon distribution and proton shape.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/94b349d4355b8dfefa919bc672e2bc5a6795a598

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Nuclear and High Energy Physics

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].”
Heavy-flavour and quarkonium production in the LHC era: from proton–proton to heavy-ion collisions (2015, methodology): “LM use two different models for N(r, x): the IIM model [815] which is a parametrisation of the expected behaviour of the solution to the BK equation [816–818] which includes a nonlinear term for the evolution of N(r, x); and the IPsat model [812, 819] which uses DGLAP equations to evolve an eikonali”
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.”
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.”