Uni-Logo Koordinatoren des Kolloquiums:
Prof. Dr. F. Schmidt-Kaler
Institut für Physik
Johannes Gutenberg-Universität
Prof. Dr. Hartmut Wittig
Institut fuer Kernphysik,
Johannes Gutenberg-Universitaet

Physikalisches Kolloquium Mainz

Institut für Kernphysik, Johann Joachim Becher Weg 45

Dienstag, den 22.01.2019 um 16 Uhr c.t. im HS KPH
Tee ab 15:45 Uhr

Collectivity in AA, pA and pp collisions at the LHC

Prof. Dr. Urs Wiedemann, CERN Theoretical Physics Department, Genf, Schweiz

Large azimuthal momentum asymmetries vn (a.k.a. flow harmonics) have been measured since long in nucleus-nucleus (AA) collisions. They indicate collectivity in the sense that they characterize a phenomenon shared by all soft particles produced in the collision. Such vn -signals are not obtained in models of the underlying event of proton-proton (pp) collisions, such as those implemented in multi-purpose event generators. However, large asymmetries vn have been measured in recent years in proton-nucleus and in high multiplicity proton-proton collisions. In this talk, I shall first shortly review the experimental state of the art of characterizing flow harmonics vn as a function of system size. I shall then give a critical assessment of the dynamical mechanisms that are studied to account for the observed phenomenology.

Kontakt: Andrea Graham, andrea.graham@uni-mainz.de