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Diffractive incoherent vector meson production off protons: a quark model approach to gluon fluctuation effects
- Source :
- Eur.Phys.J.C, Eur.Phys.J.C, 2019, 79 (4), pp.327. ⟨10.1140/epjc/s10052-019-6826-0⟩, INSPIRE-HEP, European Physical Journal C: Particles and Fields, Vol 79, Iss 4, Pp 1-16 (2019), European Physical Journal
- Publication Year :
- 2019
-
Abstract
- Fluctuations play an important role in diffractive production of vector mesons. It was in particular recently suggested, based on the Impact-Parameter dependent Saturation model (IPSat), that geometrical fluctuations triggered by the motion of the constituent quarks within the protons could explain incoherent diffractive processes observed at HERA. We propose a variant of the IPSat model which includes spatial and symmetry correlations between constituent quarks, thereby reducing the number of parameters needed to describe diffractive vector meson production to a single one, the size of the gluon cloud around each valence quark. The application to $J/\Psi$, $\rho$ and $\phi$ diffractive electron and photon production cross sections reveal the important role of geometrical fluctuations in incoherent channels, while other sources of fluctuations are needed to fully account for electroproduction of light mesons, as well as photo production of $J/\Psi$ mesons at small momentum transfer.<br />Comment: 17 pages, 15 figures, major revision, title changed, new sections included , figures added to discuss vector meson electroproduction, new references, version accepted for publication in EPJ C
- Subjects :
- Photon
Physics and Astronomy (miscellaneous)
Nuclear Theory
High Energy Physics::Lattice
diffraction
fluctuation: effect
model: dipole
01 natural sciences
7. Clean energy
High Energy Physics - Phenomenology (hep-ph)
quark: constituent
J/psi(3100): photoproduction
gluon fluctuations
Physics
quark model
saturation
Momentum transfer
higher-order: 2
HERA
High Energy Physics - Phenomenology
DESY HERA Stor
fluctuation: geometrical
Quark
Particle physics
Meson
[PHYS.NUCL]Physics [physics]/Nuclear Theory [nucl-th]
FOS: Physical sciences
lcsh:Astrophysics
Nuclear Theory (nucl-th)
DGLAP equation
particle physics, vector meson production, saturation model, gluon fluctuations
0103 physical sciences
lcsh:QB460-466
lcsh:Nuclear and particle physics. Atomic energy. Radioactivity
Vector meson
particle physics
010306 general physics
impact parameter: dependence
Engineering (miscellaneous)
010308 nuclear & particles physics
quark: correlation
Quark model
High Energy Physics::Phenomenology
vector meson production
Gluon
coherence
[PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph]
lcsh:QC770-798
saturation model
High Energy Physics::Experiment
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Journal :
- Eur.Phys.J.C, Eur.Phys.J.C, 2019, 79 (4), pp.327. ⟨10.1140/epjc/s10052-019-6826-0⟩, INSPIRE-HEP, European Physical Journal C: Particles and Fields, Vol 79, Iss 4, Pp 1-16 (2019), European Physical Journal
- Accession number :
- edsair.doi.dedup.....0d64cd93a59d01233f9ff952c8419fbf