2015/01/31 by V. Kuznetsov, F. Mammoliti, Vincenzo Bellini +8 · 16 citations
Physics and Astronomy · #Computer science #Nuclear physics research studies #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ex #hep-ph #nucl-ex
paper · pdf · doi:10.1103/physrevc.91.042201
published in Physical Review C 91(4) (American Institute of Physics) · Published version
openalex publication_date 2015/04/06 · arxiv created 2015/04/27 · arxiv updated 2015/04/28 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
First measurement of the beam asymmetry \ensuremathΣ for Compton scattering off the proton in the energy range E_\ensuremathγ=0.85--1.25\phantom\rule0.28em0exGeV is presented. The data reveal two narrow structures at E_\ensuremathγ=1.036 and E_\ensuremathγ=1.119 GeV. They may signal narrow resonances with masses near 1.68 and 1.72\phantom\rule0.28em0exGeV, or they may be generated by the sub-threshold K\ensuremathΛ and \ensuremathωp production. Their decisive identification requires additional theoretical and experimental efforts.