ELFT HÍRADÓ

[Somogyi Gábor <somogyi.gabor AT wigner.hun-ren.hu>]

Wigner FK RMI Elméleti Osztály Szemináriuma
Tisztelettel meghívjuk


        Prof. Dr. Dr. h.c. Marcus Bleicher
        (Institut fuer Theoretische Physik, Johann Wolfgang 
Goethe-Universitaet)


"Is there a violation of isospin symmetry in the Kaon sector in HIC?”


címmel tartandó szemináriumára.


Kivonat:



We address the current status of the isospin-symmetry breaking as shown 
in the ratio R_K = (K+ + K−)/(K0 + anti-K0)  discovered by NA61/SHINE in 
nucleus–nucleus collisions at the CERN SPS, its confirmation by other 
experiments and studies in e++e−. In addition, we discuss the 
theoretical status as well as we outline experimental and theoretical 
priorities. We propose that this violation of isospin symmetry maybe 
understood by introducing results from color-string fragmentation in 
e+e− to nuclear reactions. This novel input allows for a consistent 
description of the e+e− data, proton+proton data and finally 
nucleus-nucleus data at all investigated energies. We conclude that the 
observed isospin violation in nucleus-nucleus reactions is explained by 
asymmetric production of up- and down-quarks in the elementary color 
field fragmentation process. However, the reason for the symmetry 
breaking in e+e- remains unclear.



Helye: Wigner FK RMI III. ép. Tanácsterem
Ideje: 2026 május 20. szerda d.u. 15 óra [SZOKÁSOSTÓL ELTÉRŐ IDŐPONT]

Szívesen látunk minden érdeklődőt.


                  Somogyi Gábor