Karlsruhe 2024 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 114: Standard model 4 (strong/QCD)

T 114.3: Vortrag

Freitag, 8. März 2024, 09:30–09:45, Geb. 30.23: 2/0

Triple differential Z+Jet cross section measurement — •Cedric Verstege, Maximilian Horzela, Klaus Rabbertz, and Günter Quast — Karlsruhe Institute of Technology, Karlsruhe, Germany

The differential cross-sections of Z(µµ)+jet events is presented using the data recorded at 13 TeV center-of-mass energy by the CMS detector during Run 2. The cross-sections are measured as a function of the Z boson transverse momentum p_T^Z, the rapidity separation y^* of the Z boson and the leading jet, and the boost in rapidity y_b of their center-of-mass system in the lab frame. The observables y^* and y_b enhance the sensitivity to different parton initial-state and momentum contributions, and thus to the parton distribution functions.

The measured cross-sections are unfolded for detector effects in all three dimensions simultaneously. The resulting cross-sections at stable particle level are compared to precise theory predictions calculated at next-to-next-to-leading order in perturbative QCD corrected for electroweak and non-perturbative effects.