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Probing gluon density fluctuations at large momentum transfer $|t|$ at HERA
by Arjun Kumar
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Submission summary
| Authors (as registered SciPost users): | Arjun Kumar |
| Submission information | |
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| Preprint Link: | https://arxiv.org/abs/2107.08395v1 (pdf) |
| Date submitted: | 2021-07-26 09:59 |
| Submitted by: | Kumar, Arjun |
| Submitted to: | SciPost Physics Proceedings |
| Proceedings issue: | 28th Annual Workshop on Deep-Inelastic Scattering (DIS) and Related Subjects (DIS2021) |
| Ontological classification | |
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| Academic field: | Physics |
| Specialties: |
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| Approaches: | Theoretical, Phenomenological |
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.
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Well-written and interesting results on photoproduction, with comparison to HERA data.
A few grammatical suggestions for clarity, In the first paragraph:
1. " At low momentum transfer |t|, the is dominated by...", presumably there should be a word between "the" and "is".
2. "In Good walker..." -> "In the Good-Walker..."