# NLO corrections to the deeply virtual meson production revisited: impact on the extraction of generalized parton distributions

**Authors:** Marija Čuić, Goran Duplančić, Krešimir Kumerički, Kornelija Passek-K.  
**arXiv:** [2310.13837](https://arxiv.org/abs/2310.13837)  
**Date:** 2023-10-20  
**Summary page:** https://www.summarizepaper.com/en/paper/2310.13837v1/

## Key points

- Authors Marija Čuić, Goran Duplančić, Krešimir Kumerički, and Kornelija Passek-K. focus on NLO corrections for deeply virtual meson production (DVMP).
- Study combines DVMP with deeply virtual Compton scattering (DVCS) in a multichannel fit.
- Utilization of conformal partial wave (CPaW) formalism to incorporate higher-order contributions and evolutionary effects.
- Longitudinal component of vector meson DVMP cross-section described at high energies only possible at NLO within standard collinear approach.
- Simultaneous description of processes like deep inelastic scattering (DIS), DVCS, and DVMP offers insights into proton structure through universal generalized parton distribution (GPD) functions.
- Comprehensive study with 36 pages and 13 figures deepens understanding of NLO corrections' impact on DVMP and extraction of generalized parton distributions.
- Findings contribute significantly to knowledge in particle physics, paving the way for advancements in theoretical modeling and experimental investigations.

## Summary

In their paper titled "NLO Corrections to Deeply Virtual Meson Production Revisited: Impact on the Extraction of Generalized Parton Distributions," authors Marija Čuić, Goran Duplančić, Krešimir Kumerički, and Kornelija Passek-K. delve into the realm of perturbative QCD corrections at next-to-leading order (NLO) for the deeply virtual meson production (DVMP) process. Their study not only explores the phenomenology of DVMP in isolation but also delves into a multichannel fit that combines DVMP with deeply virtual Compton scattering (DVCS). Utilizing the conformal partial wave (CPaW) formalism, the authors are able to incorporate higher-order contributions and evolutionary effects with ease. Their research reveals that achieving a description of the longitudinal component of the vector meson DVMP cross-section at high energies is only possible at NLO within the standard collinear approach. Moreover, they showcase a simultaneous description of processes such as deep inelastic scattering (DIS), DVCS, and DVMP, offering valuable insights into the proton structure elucidated by unique universal generalized parton distribution (GPD) functions. With 36 pages and 13 figures, this comprehensive study provides a deeper understanding of how NLO corrections impact DVMP and sheds light on the extraction of generalized parton distributions. The findings presented by Čuić et al. contribute significantly to our knowledge of these complex processes in particle physics and pave the way for further advancements in theoretical modeling and experimental investigations in this field.