Event-shape and Multiplicity Dependence of Freeze-out Radii in Pp Collisions at √s

Event-shape and Multiplicity Dependence of Freeze-out Radii in Pp Collisions at √s
Author: Shreyasi Acharya
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Total Pages: 0
Release: 2019
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Two-particle correlations in high-energy collision experiments enable the extraction of particle source radii by using the Bose-Einstein enhancement of pion production at low relative momentum q ∝ 1/R. It was previously observed that in pp collisions at s√ = 7TeV the average pair transverse momentum kT range of such analyses is limited due to large background correlations which were attributed to mini-jet phenomena. To investigate this further, an event-shape dependent analysis of Bose-Einstein correlations for pion pairs is performed in this work. By categorizing the events by their transverse sphericity ST into spherical (ST > 0:7) and jet-like (ST