Probing gluon density fluctuations at large momentum transfer $|t|$ at HERA
Arjun Kumar
SciPost Phys. Proc. 8, 166 (2022) · published 14 July 2022
- doi: 10.21468/SciPostPhysProc.8.166
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Proceedings event
28th Annual Workshop on Deep-Inelastic Scattering (DIS) and Related Subjects
Abstract
The information on the gluonic structure and its fluctuations is captured by the differential $|t|$ spectrum in diffractive events. The incoherent cross-section is sensitive to the fluctuations in the target wavefunction in such events. We investigate the incoherent $ep$ cross-section in $J/\psi$ photoproduction using the impact-parameter dependent dipole model. The spatial gluonic structure is modelled as hotspots of gluon density having substructure where this substructure is modelled as hotspots within hotspots. We find that three levels of the substructure provide a good description of all the data, available up to $|t|=30~$GeV$^2$. We investigate these fluctuations in both the saturated and non-saturated dipole models and compare our predictions with the HERA Data.
Author / Affiliation: mappings to Contributors and Organizations
See all Organizations.- Department of Science and Technology, Ministry of Science and Technology (through Organization: विज्ञान एवं प्रौद्योगिकी विभाग / Department of Science and Technology [DST])