High Energy Physics Seminar

Room: B2.38 (Wydział Fizyki UW)

Room: B2.38

Wydział Fizyki UW

Pasteura 5
Aleksander Żarnecki (University of Warsaw (PL)), Jan Królikowski (IFD UW), Katarzyna Grzelak (IFD UW)
    • 10:15 AM 11:45 AM
      Measurement of the cross-section ratio σ(ψ(2S)) / σ(J/ψ(1S)) in exclusive photoproduction at HERA. 1h 30m


      During the seminar I will present new analysis performed with ZEUS data on exclusive vector meson photoproduction - measurement of the cross section ratio of two charmonia states: ψ(2S) and J/ψ(1S). The analysis was performed using muonic decay channels of the investigated vector mesons.

      The ratio of their production cross sections has been measured as a function of W (photon–proton centre-of-mass energy) and |t| (squared four-momentum transfer at the proton vertex) and compared to previous data in photoproduction and deep inelastic scattering and with predictions of QCD-inspired models of exclusive vector-meson production.

      Serdecznie zapraszamy

      dr hab. Katarzyna Grzelak
      prof. dr hab. Jan Królikowski
      prof. dr hab. Aleksander Filip Żarnecki

      Speaker: Dr hab. Grzegorz Grzelak