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Analysis of the ultra-peripheral events in heavy-ion collisions in the CMS experiment at the Large Hadron Collider

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Analysis of the ultra-peripheral events in heavy-ion collisions in the CMS experiment at the

Large Hadron Collider

Marek Walczak Uniwersytet Warszawski

Streszczenie

W pracy zaprezentowany jest pierwszy pomiar całkowitego prze- kroju czynnego koherentnej fotoprodukcji mezonu Υ w zderzeniach cieżkich jonów przy energii √

s

N N

= 5.02 TeV. Analizowane dane zo-

stały zarejestrowany przez eksperyment CMS przy Wielkim Zderzaczu

Hadronów w ośrodku CERN. Analizowano dane w kanale rozpadu me-

zonu Υ do dwu mionów, Υ → µ

+

µ

. Otrzymany całkowity przekrój

czynny wynosi σ

PbPb→Υ(1S),coh

= 38.4 ± 6.2 (stat) ± 3.6 (syst) µb. Ten

proces jest czuły na jądrowe Funkcje Dystrybucji Gluonów.

Cytaty

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