Using coherent dipion photoproduction to image gold nuclei

Submission summary

 As Contributors: Spencer Klein Arxiv Link: https://arxiv.org/abs/2107.10447v1 (pdf) Date submitted: 2021-07-23 02:48 Submitted by: Klein, Spencer Submitted to: SciPost Physics Proceedings Proceedings issue: DIS2021 Academic field: Physics Specialties: Nuclear Physics - Experiment Approaches: Experimental, Phenomenological

Abstract

Vector meson photoproduction offers the opportunity to image target nuclei. The two-dimensional Fourier transform $d\sigma_{\rm coherent}/dt$ of coherent vector meson photoproduction gives the two-dimensional distribution of interaction sites in the target. Since vector meson photoproduction occurs, at lowest order, via two-gluon exchange, this is sensitive to gluon shadowing. We present an analysis of $\pi^+\pi^-$ photoproduction using data from the STAR detector and a study of $d\sigma_{\rm coherent}/dt$, with an emphasis on probing the nuclear shape and its systematic uncertainties.

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