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Search for the glueball content of hadrons in γp interactions at GlueX

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摘要

We suggest a theoretical framework for the description of double photon and proton-antiproton photoproduction off the proton γ + p → 2γ + p and γ + p → pp+ p, which takes into account the contribution of the scalar mesons f_0(1370), f_0(1500), and f_0(1710). These scalars are considered as mixed states of a glueball, nonstrange and strange quarkonia. Our framework is based on the use of effective hadronic Lagrangians that phenomenologically take into account two-gluon exchange effects governing the γ + p → 2γ + p and γ + p → pp+ p processes. Present results can be used to guide the possible search for these reactions by the GlueX Collaboration at JLab.

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