Threshold photoproduction of ${\eta }_c$ and ${\eta }_b$ using holographic QCD

Abstract

We discuss the possibility that threshold photoproduction of ${\eta }_{c,b}$ may be sensitive to the pseudovector $1^{+-}$ glueball exchange. We use the holographic construction to identify the pseudovector glueball with the Kalb-Ramond field, minimally coupled to bulk Dirac fermions. We derive the holographic C-odd form factor and its respective charge radius. Using the pertinent Witten diagrams, we derive and analyze the differential photoproduction cross section for ${\eta }_{c,b}$ in the threshold regime, including the interference from the dual bulk photon exchange with manifest vector dominance. The possibility of measuring this process at current and future electron facilities is discussed.

19 pages, 10 figures; v2: typos corrected, funding reference updated

References in corpus (6)

• Towards the glueball spectrum from unquenched lattice QCD
• Structure of Vector Mesons in Holographic Model with Linear Confinement
• The nucleon spin and momentum decomposition using lattice QCD simulations
• Multi-quark matrix elements in the proton and three gluon exchange for exclusive ${\eta }_c$ production in photon-proton diffractive scattering
• Spin-1 Glueballs in the Witten-Sakai-Sugimoto Model
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Cited by in corpus (1)

• Spin-1 Glueballs in the Witten-Sakai-Sugimoto Model