SMuK 2023 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 138: QCD Experiment III
T 138.2: Vortrag
Donnerstag, 23. März 2023, 17:45–18:00, HSZ/0405
Measurement of jet mass distribution of hadronic W and Z bosons — •Steffen Albrecht1 and Andreas Hinzmann2 — 1Universität Hamburg — 2DESY, Hamburg, previously Universität Hamburg
In this talk we introduce a new effort towards measuring the jet mass distribution of hadronically decaying W and Z bosons.
We study events in which the bosons have a large transverse momentum and thus produce strongly collimated decay products reconstructed as single fat jets.
The substructure of such jets proves to be a useful handle in various procedures (e.g. jet calibration, jet tagging), but has room for improvement in its modelling.
We aim to gain an in-depth understanding of the substructure by studying the unfolded jet mass distribution in dependence of the jet pT and substructure tagger discriminants.
While previous measurements of jet mass have been carried out for gluon, quark and top jets in dijet, Z(ll)+jet and tt samples, this is the first study of W and Z jet masses in the processes with W(qq)+jets, Z(qq)+jets as well as hadronic tt systems in the final states.
In addition the measurement of the difference mZ−mW will be pursued, setting a first step towards a potential measurement of the W mass with jet substructure.