Münster 2017 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 63: Experimentelle Methoden 2 (Flavour-,Photon,Elektronidentifikation)

T 63.1: Gruppenbericht

Dienstag, 28. März 2017, 16:45–17:05, JUR 253

Heavy flavor identification at CMS — •Ivan Marchesini, Alexander Schmidt, and Svenja Schumann — Universität Hamburg

Many physics studies involving standard model processes as well as searches for physics beyond the standard model rely on the accurate identification of jets originating from bottom quarks (b jets). While constantly improving algorithms for the identification of b jets, the CMS Collaboration has recently developed also algorithms to identify charm quark jets (c jets). These new tools open the possibility to explore new channels and will play a key role in several physics studies.

As the excluded mass regions for new physics continue to increase, searches often focus on boosted final states characterized by particles with large transverse momenta. In the boosted regime the resulting decay products for hadronic decays of heavy particles tend to be collimated and can fall within a single jet. The CMS Collaboration has developed dedicated b jet identification tools for this challenging environment.

The state of the art techniques for b jet and c jet identification and their recent developments for boosted final states are presented. Their performance on data is also discussed, based on proton-proton collisions recorded by the CMS detector at a center of mass energy of 13 TeV.