Energy-Energy Correlator for Jet Production in pp and pA Collisions.

Area of Science:

• High Energy Physics
• Quantum Chromodynamics
• Nuclear Physics

Background:

• The energy-energy correlator is a key observable in high-energy particle collisions.
• Understanding jet production in proton-proton and proton-nucleus collisions is crucial for probing the strong force.
• Existing models require refinement to describe experimental data across various kinematic regimes.

Purpose of the Study:

• To develop and validate a nonperturbative model for the energy-energy correlator.
• To accurately describe single-inclusive jet production in proton-proton collisions.
• To investigate the impact of the nuclear medium on jet production in proton-nucleus collisions.

Main Methods:

• Development of a nonperturbative model for the energy-energy correlator.
• Analysis of the collinear limit within the model.
• Comparison of model predictions with experimental data from CMS and ALICE.

Main Results:

• The model accurately describes the energy-energy correlator in proton-proton collisions across a wide range of jet transverse momenta.
• Predictions for proton-nucleus collisions, incorporating nuclear medium modifications, align well with ALICE measurements.
• The study validates the nonperturbative approach for describing experimental observations.

Conclusions:

• The developed nonperturbative model provides a robust description of the energy-energy correlator in jet production.
• The findings confirm the importance of nuclear medium effects in proton-nucleus collisions.
• This work offers a valuable tool for future analyses in high-energy nuclear and particle physics.