7-11 October 2019
Facultad de Ciencias Físicas, Universidad Complutense de Madrid
Europe/Madrid timezone

Entanglement and thermal behaviour of pp collisions

8 Oct 2019, 09:40
35m
Aula M2 (Facultad de Ciencias Físicas, Universidad Complutense de Madrid)

Aula M2

Facultad de Ciencias Físicas, Universidad Complutense de Madrid

Plaza de Ciencias, 1 Ciudad Universitaria 28040 Madrid, Spain

Speaker

Carlos Pajares Vales (Universidad Santiago de Compostela)

Description

The thermalization of particles produced in collisions of small systems can be achieved by quantum entanglement of the partons of the initial state. We study the transverse momentum distributions in pp and PbPb collisions at different energies and centralities, observing in all cases a relation between the effective thermal temperature of the low pt spectrum and the hard scale of the high pt spectrum. This relation is mainly due to the normalized fluctuations of the number of partons. We show a relation between these fluctuations and the temperature fluctuations by means of a Langevin equation for a white stochastic noise. We compute the entanglement entropy, Using that the multiplicity distribution associated to events with at least a hard collision is a gamma distribution. The leading contribution is the logarithm of the number of partons, meaning that these microstates are equally probable and the entropy is maximal

Primary author

Carlos Pajares Vales (Universidad Santiago de Compostela)

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