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GlueX Experiment Document 6279-v2

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Partial Wave Analysis of Neutral b1 Meson at GlueX

Document #:
GlueX-doc-6279-v2
Document type:
Thesis
Submitted by:
Zisis Papandreou
Updated by:
Zisis Papandreou
Document Created:
16 Nov 2023, 18:40
Contents Revised:
30 Apr 2024, 13:47
Metadata Revised:
30 Apr 2024, 13:48
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Abstract:
Recent Lattice QCD calculations predict that the lightest exotic pi1(1600) decays primarily to a b1 system and can be experimentally accessed through the dominant decay b1 -> omega-pi0. In this dissertation, direct production of the b1 meson γp -> b1p where the axial-vector meson b1(1235) decays to omega-pi0, is studied in detail. Results of Partial Wave Analysis (PWA) on the photoproduction of the b1(1235) meson system are shown, with emphasis on the extraction of D-wave to S-wave ratio (termed dsratio), which is a characteristic property of this meson and this coupling has been predicted by Lattice QCD calculations. The dsratio does not depend on the production mechanism nor on features such as the momentum transfer or the polarization of the photon beam. PWA in the mass range between 1.0 − 2.0 GeV was carried out in bins of 80 MeV, and three momentum transfer ranges. The analysis procedure was validated using Monte Carlo simulated data to be free of any potential biases.
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Keywords:
Amplitude Analysis
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