Frankfurt 2014 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 47: Hadronenstruktur und -spektroskopie

HK 47.5: Vortrag

Donnerstag, 20. März 2014, 18:00–18:15, HZ 1+2

A Partial-Wave Analysis of Centrally Produced Two-Pseudoscalar Final States in pp-Reactions at COMPASS — •Alexander Austregesilo — Physik-Department E18, Technische Universität München

COMPASS is a fixed-target experiment at the CERN SPS which focused on light-quark hadron spectroscopy during the data taking periods in 2008 and 2009. A world-leading data set was collected with a 190 GeV/c hadron beam impinging on a liquid hydrogen target in order to study, inter alia, the central exclusive production of glueball candidates in the light-meson sector. Especially the double-Pomeron exchange mechanism ought to be well suited for the production of mesons without valence quark content. We select centrally produced systems with two pseudo-scalar mesons in the final state from the COMPASS data set recorded with an incoming proton. The decay of this system is decomposed in terms of partial waves, where particular attention is paid to the inherent mathematical ambiguities of the amplitude analysis. Furthermore, we discuss possible parametrisations that are able to describe the mass dependence of the partial-wave analysis results of ππ and KK final states.

Supported by BMBF, MLL and the Cluster of Excellence Exc153 ’Origin and Structure of the Universe’.