PA-PRO-2018-017

Publication title: 

Precision spectroscopy of charmonium-like (exotic) XYZ states at PANDA/FAIR -- Sensitivity study for width and line-shape measurements of the X(3872)

Publication author: 

Frank Nerling

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Publication date: 

Thursday, 29 November, 2018

Publication abstract: 

The PANDA experiment represents the central part of the hadron physics programme at the new Facility for Antiproton and Ion Research (FAIR) under construction at GSI/Darmstadt (Germany). The multi-purpose PANDA detector in combination with an intense and high-quality antiproton beam allows for coverage of a broad range of different aspects of QCD, and it is best suited for charmonium spectroscopy. We present a comprehensive PANDA Monte Carlo simulation study for precision resonance energy scan measurements, using the example of the charmonium-like $X(3872)$ state discussed to be exotic. Apart from the proof of principle for natural decay width and line-shape measurements of very narrow resonances, the achievable sensitivities are quantified for the concrete example of the $X(3872)$. The discussed measurement is uniquely possible with a $\bar{p}p$ annihilation experiment such as PANDA at FAIR.