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High Energy Physics - Experiment

arXiv:1602.03991 (hep-ex)
[Submitted on 12 Feb 2016]

Title:Light Scalar Mesons in Central Production at COMPASS

Authors:A. Austregesilo (for the COMPASS collaboration)
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Abstract:COMPASS is a fixed-target experiment at the CERN SPS that studies the spectrum of light-quark hadrons. In 2009, it collected a large dataset using a $190\,$GeV$/c$ positive hadron beam impinging on a liquid-hydrogen target in order to measure the central exclusive production of light scalar mesons. One of the goals is the search for so-called glueballs, which are hypothetical meson-like objects without valence-quark content. We study the decay of neutral resonances by selecting centrally produced pion pairs from the COMPASS dataset. The angular distributions of the two pseudoscalar mesons are decomposed in terms of partial waves, where particular attention is paid to the inherent mathematical ambiguities. The large dataset allows us to perform a detailed analysis in bins of the two squared four-momentum transfers carried by the exchange particles in the reaction. Possible parameterisations of the mass dependence of the partial-wave amplitudes in terms of resonances are also discussed.
Comments: Proceedings for the XVI International Conference on Hadron Spectroscopy (Hadron 2015), September 13-18 2015, Newport News, VA (U.S.A.)
Subjects: High Energy Physics - Experiment (hep-ex); High Energy Physics - Phenomenology (hep-ph)
Cite as: arXiv:1602.03991 [hep-ex]
  (or arXiv:1602.03991v1 [hep-ex] for this version)
  https://doi.org/10.48550/arXiv.1602.03991
Related DOI: https://doi.org/10.1063/1.4949395

Submission history

From: Alexander Austregesilo [view email]
[v1] Fri, 12 Feb 2016 09:46:46 UTC (573 KB)
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