Luminosity calibration by means of van-der-Meer scan for Q-Gaussian beams

TL;DR

This paper models the van-der-Meer scan using q-Gaussian distributions to improve the accuracy of luminosity calibration in collider physics, offering a potentially more realistic approach than traditional Gaussian models.

Contribution

It introduces a q-Gaussian based model for van-der-Meer scans, enhancing the precision of luminosity calibration in particle colliders.

Findings

Q-Gaussian model better fits particle density distributions.

Improved calibration accuracy demonstrated with the new model.

Potential for more precise collider luminosity measurements.

Abstract

Luminosity is the key quantity characterizing the performance of charged particle colliders. Precise luminosity determination is an important task in collider physics. Part of this task is the proper calibration of detectors dedicated for luminosity measurements. The wide-used experi-mental method of calibration is the van-der-Meer scan, which is the beam separation scan performed at specifically optimized beam conditions. This work is devoted to modeling this scan with the q-Gaussian distribution of particles in colliding beams. Because of its properties, the Q-Gaussian distribution is believed to describe the density closer to reality than regular Gaussian-based models. In this work, the q-Gaussian model is applied for van-der-Meer scan modeling, and the benefits of this model for luminosity calibration task are demonstrated.