Münster 2017 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 105: Suche nach neuen Teilchen 6

T 105.2: Vortrag

Donnerstag, 30. März 2017, 17:00–17:15, JUR 5

Calibration of the ATLAS Tile Calorimeter and the implications for the search for heavy charged long-lived particles — •Michael Adersberger and Sascha Mehlhase — Ludwig-Maximilians Universität München

Heavy charged long-lived particles are a promising but challenging type of particles predicted in many extensions of the Standard Model (SM). The high mass together with the long lifetime lead to a distinct signature in the detector. In this search only lifetimes allowing for a direct interaction with at least the hadronic tile calorimeter are considered, called Stable Massive Particles (SMPs). SMPs are expected to have a velocity significantly lower than the speed-of-light. The main observables for SMPs are long time-of-flight and high specific energy loss measurements together with a high momentum, as no particles in the SM are produced at the Large Hadron Collider (LHC) able to traverse the full (or at least a large fraction) detector with low velocities. The main background for this analysis is therefore detector mis-measurements. Hence it is essential to have a deep understanding of the measurements of the main observables in the corresponding detector components. A detailed description of the time-of-flight calibration of the ATLAS Tile Calorimeter together with the search for SMPs with the ATLAS detector at a center-of-mass energy of 13 TeV will be presented in this talk.