6533b835fe1ef96bd129eac9
RESEARCH PRODUCT
In depth analysis of the combined HERA data in the dipole models with and without saturation
P. ZuritaHeikki Mäntysaarisubject
QuarkprotonitParticle physicsNuclear TheoryFOS: Physical scienceshiukkasfysiikkaComputer Science::Digital Libraries01 natural sciencesCharm quarkNuclear Theory (nucl-th)High Energy Physics - Phenomenology (hep-ph)quantum chromodynamics0103 physical sciences010306 general physicsPhysicsta114protons010308 nuclear & particles physicssaturationHigh Energy Physics::PhenomenologyStructure functionHERAHigh Energy Physics - PhenomenologyDipoleAmplitudeHigh Energy Physics::ExperimentImpact parameterSaturation (chemistry)description
We present an updated impact parameter dependent saturation model (IPsat) determined trough a fit to the combined HERA I and I+II reduced cross section data. The same HERA data are used to fit the linearized (IPnonsat) version of the applied dipole amplitude, which makes it possible to estimate the magnitude of the saturation effects in various experiments. We find that both parametrizations provide comparable descriptions of the considered data when an effective confinement scale dynamics is incorporated with quark masses. Moreover, it is possible to consistently determine the light and charm quark masses. The role of potentially non-perturbatively large dipoles is examined in detail, with the result that, especially in case of the structure function $F_2$, their contribution is numerically significant. Potential to discriminate between the two models in future $e+p$ and $e+A$ experiments is also illustrated.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2018-08-01 | Physical Review D |