Rapidity fluctuations in the initial state
Wojciech Broniowski, Piotr Bozek
TL;DR
This paper investigates two-particle pseudorapidity correlations in high-energy collisions, attributing observed fluctuations to wounded nucleon number and string length variations, aligning with LHC data.
Contribution
It introduces a simple model linking rapidity fluctuations to wounded nucleon and string length variations, providing analytical formulas for correlation analysis.
Findings
Qualitative and semi-quantitative agreement with LHC measurements
Identification of fluctuation components in correlations
Analytical formulas for correlation components
Abstract
We analyze two-particle pseudorapidity correlations in a simple model, where strings of fluctuating length are attached to wounded nucleons.The obtained straightforward formulas allow us to understand the anatomy of the correlations, i.e., to identify the component due to the fluctuation of the number of wounded nucleons and the contribution from the string length fluctuations. Our results reproduce qualitatively and semiquantitatively the basic features of the recent correlation measurements at the LHC.
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Taxonomy
TopicsHigh-Energy Particle Collisions Research · Particle physics theoretical and experimental studies · Quantum Chromodynamics and Particle Interactions