Gluon tomography with UPCs - Jian Zhou

Hadron Ion Tea Seminar at Berkeley Lab (hit.lbl.gov)

Speaker: Jian Zhou

April 18, 2023

"Gluon tomography with UPCs"

Linearly polarized coherent photons excited by a charged ultra-relativistic nucleus is proven to be a powerful experimental tool to explore the gluon tomography. We show that various azimuthal asymmetries in diffractive ρ 0 production observed in ultraperipheral heavy ion collisions by STAR collaboration arise from the linear polarization of photons. More interestingly, the cos 2ϕ asymmetry provides a unique chance to study the double slit interference effect in high energy scatterings, while the observation of the cos 4ϕ asymmetry might signal the existence of the nontrivial correlation in quantum phase distribution of gluons.

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