Fixed particle number constraint in a simple model of a thermal expanding system and $pp$ collisions at the LHC

Abstract

Two-boson momentum correlations at fixed particle number constraint are studied in a simple analytically solvable model of a thermal expanding system. We show that the increase of expansion rate, as well as increase of particle multiplicity, enhances the ground-state contribution to particle momentum spectra and leads to suppression of the Bose-Einstein momentum correlations. The relations of these findings to the multiplicity-dependent measurements of the Bose-Einstein momentum correlations in high-multiplicity $p+p$ collision events at the LHC are discussed.

21 pages, 6 figures

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• The smallest fluid on earth
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Cited by in corpus (1)

• Quantum local-equilibrium state with fixed multiplicity constraint and Bose-Einstein momentum correlations