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SUMMARY:Is there a violation of isospin symmetry in the Kaon sector in HIC
 ?
DTSTART:20260520T130000Z
DTEND:20260520T140000Z
DTSTAMP:20260526T113300Z
UID:indico-event-1798@indico.wigner.hu
DESCRIPTION:Speakers: Marcus Bleicher (Institut fuer Theoretische Physik\,
  Johann Wolfgang Goethe-Universitaet)\n\nWe 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 t
 he CERN SPS\, its confirmation by other experiments and studies in e++e−
 . In addition\, we discuss the theoretical status as well as we outline ex
 perimental and theoretical priorities. We propose that this violation of i
 sospin 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 final
 ly nucleus-nucleus data at all investigated energies. We conclude that the
  observed isospin violation in nucleus-nucleus reactions is explained by a
 symmetric 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.\n\nhttps://indico.wigner.hu/event/1798/
URL:https://indico.wigner.hu/event/1798/
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