Workshop on isospin symmetry violation: kaons and beyond - ISO-BREAK 25

23 Oct 2025, 09:00 → 25 Oct 2025, 17:00 Europe/Warsaw

B1 (Institute of Physics, Jan Kochanowski University)

Francesco Giacosa (Kielce University), Marek Gazdzicki (Jan Kochanowski University (PL))

We are pleased to announce that the Workshop on isospin symmetry violation: kaons and beyond (ISO‑BREAK 25) will be held at the Institute of Physics of Jan Kochanowski University in Kielce on October 23–25, 2025 (Thursday – Saturday).

The workshop follows the publication of the isospin-breaking article by the NA61/SHINE and theory colleagues in Nature Communications (https://rdcu.be/emX58) and the subsequent discussion at the open session of the NA61/SHINE Collaboration meeting in Dubrovnik.

During the workshop, we plan to have ample time to present and discuss subjects related to the Nature article – the observation of the isospin breaking beyond known effects. In particular, we should discuss the possibility of testing the results with new high-precision measurements, extending them to hadrons other than kaons, and brainstorming on their interpretations.

The number of participants is limited to approximately 30, and therefore, participation will be moderated by the organizers.

The workshop is co-financed by the Polish Minister of Science under the “Excellence Initiative” Program (Project No: RID/SP/0015/2024/01)

There is no conference fee.

 

Final-Circular.pdf

Thursday 23 October

09:00 Cofee

1 Why do we meet?

Speaker: Marek Gazdzicki (Jan Kochanowski University (PL))

ISOBREAK25.pdf

2 Welcome

3 Isospin

Speaker: Prof. Francesco Giacosa (Kielce University)

Giacosa_ISOBREAK25.pdf

Experimental status and outlook

Convener: Marek Gazdzicki (Jan Kochanowski University (PL))

4 Charged to neutral kaon ratio in NA61/SHINE

Speakers: Andrzej Krzysztof Rybicki (Polish Academy of Sciences (PL)), Seweryn Kowalski (University of Silesia (PL))

NA61 SHINE ISOBREAK.pdf

5 Charged to neutral kaon ratio in NA49 and NA35

Speaker: Herbert Stroebele (Institut fuer Kernphysik-Johann-Wolfgang-Goethe Univ.-Unknown)

Herbert.pdf

6 Meeting's logistics

Speaker: Milena Piotrowska (Jan Kochanowski Uniwersity, Kielce)

Useful logistic informations_MP v2.pdf

11:10 Coffee

Experimental status and outlook

Convener: Eric Daniel Zimmerman (University of Colorado Boulder (US))

7 Charged to neutral kaon ratio in STAR (R)

Speaker: Mr Li'Ang Zhang (Central ChinaNormal University (CCNU))

ISOBREAK_KaonProduction_LiAngZhang.pdf

8 Charged to neutral kaon ratio in ALICE I

Speaker: Francesca Ercolessi (Universita e INFN, Bologna (IT))

IsoBreak_FErcolessi_v3-1.pdf

9 Charged to neutral kaon ratio in HADES

Speaker: Manuel Lorenz

lorenz_isobreak25_animated.pdf

10 Discussion

13:15 Lunch

Legacy modelling

Convener: Prof. Francesco Giacosa (Kielce University)

11 Strong isospin breaking in lattice QCD

Speaker: Bastian Brandt (University of Bielefeld)

talk_brandt.pdf

12 Strings (UrQMD, EPOS)

Speakers: Klaus WERNER (subatech), Marcus Bleicher

Talk_Bleicher_Isobreak_1.pdf

13 Statistical models (R)

Speaker: Mark Gorenstein

Gorenstein-3.pdf

16:00 Coffee

Legacy modelling

Convener: Marcus Bleicher

14 Hadron Recombination Model and its predictions

Speaker: Joanna Maria Stepaniak (National Centre for Nuclear Research (PL))

ISO-3.pdf

15 Quarkonic picture in isospin QCD

Speaker: Oleksii Ivanytskyi (University of Wroclaw)

Ivanytskyi_ISO-BREAK 25.pdf

16 Strings (SMASH)

Speaker: Mr Oleksandr Vitiuk (University of Wroclaw (PL))

ISO_BREAK_KIELCE.pdf

17 Study of isospin symmetry violation in kaons and beyond using the HRG model

Speaker: Dr Subhasis Samanta

Subhasis_1.pdf

18 Discussion

Friday 24 October

Fitting the data et al.

Convener: Stanislaw Mrowczynski (National Centre for Nuclear Research, Warsaw, Poland)

19 UrQMD + fit

Speaker: Marcus Bleicher

Talk_Bleicher_Isobreak_2.pdf

20 Coalescence + fit

Speaker: Martin Rohrmoser (Uniwersytet Jana Kochanowskiego w Kielcach)

main.pdf

21 Feasibility of testing isospin symmetry with pions

Speakers: Damian Pszczel, Damian Pszczel (Uppsala University), Damian Pszczel (National Centre for Nuclear Research)

Kielce_Workshop__10_2025_.pdf

22 Discussion

More from the experiments

Convener: Stanislaw Mrowczynski (National Centre for Nuclear Research, Warsaw, Poland)

23 Charged and neutral kaon production in ALICE: prospects

Speaker: Nicolò Jacazio (Universita del Piemonte Orientale (IT))

nj-Kielce_ALICE_and_the_kaons_v4.pdf

24 Simulation related to the ALICE results

Speaker: Nicolò Jacazio (Universita del Piemonte Orientale (IT))

nj-Kielce_ALICE_and_the_kaons_MC.pdf

11:00 Coffee

More from the experiments

Convener: Seweryn Kowalski (University of Silesia (PL))

25 Charged to neutral kaon ratio in BESIII (R)

Speaker: Linqin Huang

Charged to neutral Kaon in BESIII.pdf

26 Flavor Dependence of Charged Pion Fragmentation Functions

Speaker: Dipangkar Dutta (Mississippi State University)

isobreak25_dutta.pdf

27 Charged kaons in SHINE

Speaker: Maciej Piotr Lewicki (Polish Academy of Sciences (PL))

isobreak.pdf

28 Neutral kaons in SHINE

Speaker: Tatjana Susa (Rudjer Boskovic Institute (HR))

tanjaISOBREAK_24102025.pdf

29 Discussion

13:30 Lunch

30 Isospin in QCD (R)

Speaker: Robert Pisarski

isospin_violation_oct25.pdf

31 Blind analysis (R)

Speakers: Dr Jim Drachenberg (Abilene Christian University), Jim Drachenberg, Jim Drachenberg, Jim Drachenberg

ISO-BREAK25-Drachenberg.v1.pdf

16:00 Coffee

32 A brief history of thermal and statistical models (R)

Speaker: Joseph Kapusta (University of Minnesota (US))

Brief History.pdf

33 Disoriented isospin condensates and anomalous kaon fluctuations (R)

Speaker: Mayank Singh

singh_M_iso_break_25.pdf

20:00 Workshop dinner

Saturday 25 October

Brainstorming Possible Explanations and More

Convener: Wojciech Broniowski

34 Effect of q-qbar mutual interaction on q-qbar creation

Speaker: Stanislaw Mrowczynski (National Centre for Nuclear Research, Warsaw, Poland)

Mrowczynski.pdf

35 Strong fields and Isospin violation in the initial stage of heavy ion collisions

Speaker: Johann Rafelski (Tucson, Arizona (US))

25OctISObreakJRafelski.pdf

36 Thoughts on isospin

Speaker: Dr Leonardo Tinti (Uniwersytet Jana Kochanowskiego w Kielcach)

ISO_BREAK_25_Tinti.pdf

11:40 Coffee

Brainstorming Possible Explanations and More

Conveners: Katarzyna Grebieszkow (Warsaw University of Technology (PL)), Katarzyna Grebieszkow (Warsaw University of Technology (PL))

37 Testing strangeness conservation

Speaker: Herbert Stroebele (Institut fuer Kernphysik-Johann-Wolfgang-Goethe Univ.-Unknown)

Kaon-talk.pdf

38 Nonlinear selection rules due to isospin symmetry

Speakers: Ludwik Turko (University of Wroclaw, Wroclaw, Poland), Ludwik Turko (University of Wroclaw (PL)), Ludwik Turko (University Wroclaw)

NonlinearSelectionRules_LT.pdf

39 Implementing isospin breaking within THERMINATOR

Speaker: Dr Radoslaw Ryblewski (Institute of Nuclear Physics PAN)

talk ISOBREAK25 Ryblewski.pdf

40 Discussion

13:30 Lunch