2022/12/09(Fri)
11:00 -12:00
視訊演講 Video Seminar [ Meeting Link / ID: 2516 360 8923 / Password: JxrPUaBP342 ]
Title
J/ψ near threshold in holographic QCD: A and D gravitational form factors
Speaker
Dr. Kiminad Mamo (Argonne National Laboratory, USA)Abstract
The diffractive photoproduction of J/Ψ on a nucleon is mostly due to gluonic exchanges at all s. In holographic QCD (large number of colors and strong ′t Hooft coupling), these exchanges are captured by the t-channel 0++ and 2++ glueball resonances near threshold, and their reggeized form (Pomeron) asymptotically. Using Witten diagrams in a confining AdS background, we derive the holographic scattering amplitude for the near threshold photoproduction of J/Ψ, and show that it explicitly depends on gluonic A and D gravitational form factors of proton. We also discuss the recent successful experimental extraction of the gluonic gravitational form factor of proton, using our holographic scattering amplitude, at Jefferson Lab.
Language
演講語言 (Language): in English
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