Month: Maj 2024

SEMINARIUM FIZYKI WIELKICH ENERGII

Dnia 24 maja (piątek) o godzinie 10:15, w sali B2.38 odbędzie się seminarium, na którym zostanie wygłoszony referat pt.:

„The Standard Model electroweak sector after Run 2 – selective review of CMS results”

Referuje: dr hab. Michał Szleper, prof. NCBJ  (NCBJ)

  Run 2 of the Large Hadron Collider has produced a lot of results from the electroweak sector of the Standard Model. This includes measurements that shed light on the interactions between vector bosons – triple and quartic gauge couplings – based on a variety of physics processes: from inclusive diboson production to single boson in vector boson fusion mode, vector boson scattering and triboson production. In this seminar we will review the importance and role of triple and quartic gauge couplings in the search for physics beyond the Standard Model and how we measure them. I will give an overview of CMS results obtained from Run 2 data and discuss what should and can be improved in Run 3 and the HL-LHC.

Serdecznie zapraszamy

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

SEMINARIUM FIZYKI WIELKICH ENERGII

Dnia 17 maja (piątek) o godzinie 10:15, w sali B2.38 odbędzie się seminarium, na którym zostanie wygłoszony referat pt.:

„Recent results from COMPASS on the GPD program”

Referuje: prof. dr hab. Andrzej Sandacz  (Dep. of Fundamental Research, NCBJ)

Generalised Parton Distrbutions (GPDs) provide 3-D description of the nucleon structure. They encompass 1-D description by PDFs or by form factors. The two most appealing goals of the GPD studies are: the „nucleon tomography” and the role of the orbital momenta of quarks and gluons in  explaining „nucleon spin crisis”. 

After an introduction to the GPDs, the upgrade of the experimental setup, which was  essential for the COMPASS GPD program, will be briefly described. The discussion of results for investigated three channels of  exclusive pseudo-scalar or vector mesons production will follow.They consitute an important input for modelling GPDs. In particular, in the context of the phenomenological Goloskokov-Kroll model they provide a clear evidence for the parton helicity-flip (chiral-odd) GPDs.

Serdecznie zapraszamy

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