Kielce group Analysis meeting

Friday 28 Mar 2025, 10:30 → 12:30 Europe/Zurich

349 (UJK)

Grzegorz Stefanek (Jan Kochanowski University (PL)), Tobiasz Czopowicz (Jan Kochanowski University (PL)), Valeria Zelina Reyna Ortiz (Jan Kochanowski University (PL))

10:30 → 10:35 Organizational issues

Speakers: Ali Soheilbeigi Bazgir (Jan Kochanowski University (PL)), Grzegorz Stefanek (Jan Kochanowski University (PL)), Haradhan Adhikary (Jan Kochanowski University (PL)), Ivan Pidhurskyi (Jan Kochanowski University (PL)), Maciej Rybczyński (Jan Kochanowski University), Marek Gazdzicki (Jan Kochanowski University (PL)), Oleksandra Panova (Jan Kochanowski University (PL)), Tobiasz Czopowicz (Jan Kochanowski University (PL)), Uzair Shah (Jan Kochanowski University (PL)), Valeria Zelina Reyna Ortiz (Jan Kochanowski University (PL)), Yehor Bondar (Jan Kochanowski University (PL)), Zbigniew Włodarczyk (Jan Kochanowski University)

10:35 → 11:25 Spectra analyses

10:45 Spectra in Xe+La

Speaker: Oleksandra Panova (Jan Kochanowski University (PL))

10:55 ToF-dE/dx analysis of Xe+La

Speaker: Elizaveta Zherebtsova (University of Wroclaw (PL))

11:05 dE/dx analysis of Pb+Pb @ 13A, 30A GeV/c

Speaker: Uzair Shah (Jan Kochanowski University (PL))

11:15 h⁻ analysis of Pb+Pb @ 13A, 30A GeV/c

Speaker: Ali Soheilbeigi Bazgir (Jan Kochanowski University (PL))

11:25 → 11:55 Critical Point analyses

11:25 proton intermittency in Ar+Sc @ 13A-75A GeV/c

Speaker: Haradhan Adhikary (Jan Kochanowski University (PL))

11:35 h⁻ intermittency in Xe+La

Speaker: Valeria Zelina Reyna Ortiz (Jan Kochanowski University (PL))

11:45 proton intermittency in Ar+Sc @ 150A GeV/c

Speaker: Tobiasz Czopowicz (Jan Kochanowski University, Warsaw University of Technology)

11:55 → 12:15 Charm analyses

11:55 Tobiasz

Speaker: Tobiasz Czopowicz (Jan Kochanowski University (PL))

12:05 Ivan

Speaker: Ivan Pidhurskyi (Jan Kochanowski University (PL))

12:15 → 12:25 Lambda polarization

Speaker: Yehor Bondar (Jan Kochanowski University (PL))

Bondar_QM2025_poster.pdf

datatotalstatsyst_plot3pt7xfbins.pdf

polarizationcomparison_xf.pdf

2025, 2 July – 4 July, The 21st International Conference on QCD
in Extreme Conditions (XQCD 2025), Wroclaw, Poland
(abstract deadline: April 24, 2025)
https://indico.cern.ch/event/1465523

[ Talks will have proceedings in
Journal of Subatomic Particles and Cosmology

quite new unknown journal]

Λ transverse polarization in p+p interactions within NA61/SHINE at the CERN SPS

The observation of significant Λ hyperon transverse polarization, i.e. the polarization in the direction transverse to the Λ production plane, in inclusive p+p and p+A collisions using unpolarized beams triggered theoretical efforts to describe this effect. Numerous models have been proposed to explain the origin of hyperon polarization. Several models have successfully explained the behavior of some hyperons, but none have been able to account for the behavior of the entire hyperon family.

NA61/SHINE is a fixed-target experiment with large acceptance and high particle identification capabilities at the CERN SPS.  The first feasibility studies have shown that the properties of the magnetic field used by NA61/SHINE, together with high statistics of collected p+p collisions at beam momentum 158 GeV/c, offer possibilities to study Λ polarization in several bins of $p_\text{T}$ and $x_\text{F}$. This work will contain a description of the methodology of our studies and will present preliminary results on Λ transverse polarization  in Feynman-x $x_\text{F} \in$ (-0.3,0.2) and $p_\text{T} \in$ (0.2,1.2) GeV/c compared with results from other experiments and predictions of DeGrand - Miettinen model.