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arXiv · 1501.04333

Evidence for narrow resonant structures at $W \approx 1.68$ and $W \approx 1.72$ GeV in real Compton scattering off the proton

V. Kuznetsov·F. Mammoliti·V. Bellini·G. Gervino·F. Ghio·G. Giardina·W. Kim·G. Mandaglio·M. L. Sperduto·C. Sutera
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Abstract

First measurement of the beam asymmetry $Σ$ for Compton scattering off the proton in the energy range $E_γ=0.85 - 1.25$ GeV is presented. The data reveals two narrow structures at $E_γ= 1.036$ and $E_γ=1.119$ GeV. They may signal narrow resonances with masses near $1.68$ and $1.72$ GeV, or they may be generated by the sub-threshold $KΛ$ and $ωp$ production. Their decisive identification requires additional theoretical and experimental efforts.

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V. Kuznetsov, F. Mammoliti, V. Bellini, G. Gervino, F. Ghio, G. Giardina, W. Kim, G. Mandaglio, M. L. Sperduto, C. Sutera. 2015-04-27. Evidence for narrow resonant structures at $W \approx 1.68$ and $W \approx 1.72$ GeV in real Compton scattering off the proton. https://doi.org/10.1103/physrevc.91.042201

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