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Zapraszamy na seminarium 7.03.2023

Dear All,


we have the pleasure to invite you to the Particle Theory Seminar on Tuesday, March 7  at 12:15, which will be given by


Sándor Lökös (IFJ PAN)




"On the shape of the Bose-Einstein correlation function"




" Quantum statistical correlations were discovered by Hanbury Brown and Twiss by studying astrophysical objects in 1956. Later, the phenomena was also observed in high energy physics by Goldhaber, Goldhaber, Lee and Pais. The correlation function can be linked to the geometrical size of the source; that feature allowed astrophysicist to determine angular diameter of stars and it allows to perform investigation on the femtometer scale in high energy reactions. Hence the field usually refered as femtoscopy, however, the term was coined much later than the discovery. Precise measurements of the shape of such correlation functions revealed that the usually assumed Gaussian source shape is insufficient to describe the data and a more general source distribution should be considered, i.e., the Levy-stable distributions. The shape of the correlation functions is important not only because of its power of mapping the spatio-temporal structure of the emitting source on the femtometer scale but the detailed investigation could reveal underlying processes like partially coherent particle production, in-medium mass modifications or could give us information about the QCD phase diagram. In my presentation I will discuss the theoretical basis of the HBT analyses and give an exhaustive overview of recent experimental results from RHIC and LHC."


The seminar will be in a hybrid mode, local people are invited to meet in the seminar room D-2-02.

Piotr Korcyl, Jacek Wosiek, Michał Praszałowicz