Aachen 2019 – scientific programme

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T: Fachverband Teilchenphysik

T 70: QCD (Experiment)

T 70.1: Talk

Wednesday, March 27, 2019, 16:00–16:15, H10

Prospects for a precise determination of PDFs from measurements of the dijet cross section at √s = 13 TeV with the CMS detector — Günter Quast, Klaus Rabbertz, and •Daniel Savoiu — Institut für Experimentelle Teilchenphysik, Karlsruher Institut für Technologie (KIT)

Precision studies at hadron colliders play an increasingly important role in the search for new or rare physics phenomena. An essential prerequisite for these studies is the precise knowledge of the Parton Distribution Functions (PDFs) of the proton, which are not predicted by theory and must therefore be determined experimentally.

Dijet production is particularly well-suited for this purpose. Not only are pairs of jets produced in abundance at the LHC, maximizing the statistical precision, but the different topologies of dijet events can be exploited in a triple-differential cross section measurement for a more precise determination of PDFs.

In the presented analysis of data taken with the CMS detector at an energy of 13 TeV, the dijet phase space is divided in terms of the boost of the dijet system, the rapidity separation of the two jets, and the average jet transverse momentum.