Bayesian inference of the fluctuating proton shape

Abstract

Using Bayesian inference, we determine probabilistic constraints on the parameters describing the fluctuating structure of protons at high energy. We employ the color glass condensate framework supplemented with a model for the spatial structure of the proton, along with experimental data from the ZEUS and H1 Collaborations on coherent and incoherent diffractive $\mathrm{J}/\psi$ production in e+p collisions at HERA. This data is found to constrain most model parameters well. This work sets the stage for future global analyses, including experimental data from e+p, p+p, and p+A collisions, to constrain the fluctuating structure of nucleons along with properties of the final state.

12 pages, 2 figures. 1000 parameterizations sampled from the determined posterior distributions are included in the source package

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• Progress and Challenges in Small Systems
• Bayesian quantification of strongly-interacting matter with color glass condensate initial conditions
• Energy dependent nuclear suppression from gluon saturation in exclusive vector meson production
• Proton hot spots and exclusive vector meson production
• Inferring the initial condition for the Balitsky-Kovchegov equation
• Flavor hierarchy of parton energy loss in quark-gluon plasma from a Bayesian analysis
• Global Bayesian Analysis of $\mathrm{J}/\psi$ Photoproduction on Proton and Lead Targets
• On model emulation and closure tests for 3+1D relativistic heavy-ion collisions
• Higher-order correlations between different moments of two flow amplitudes in Pb$-$Pb collisions at $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV
• Multiplicity fluctuations and correlations in 5.02 TeV p+Pb collisions at zero impact parameter
• Evolution of eccentricities induced by geometrical and quantum fluctuations in proton-nucleus collisions
• Studying the 3+1D structure of the Glasma using the weak field approximation
• Measurement of $p$-${\Xi }^{-}$ ($\bar{p}$-${\bar{\Xi }}^{+}$) Correlation Function in Isobar and Au+Au Collisions at $\sqrt{s_{\mathrm{NN}}}$ = 200 GeV with the STAR Detector
• Exploring nuclear structure with multiparticle azimuthal correlations at the LHC
• Nuclear deformation effects in photoproduction of $\rho$ mesons in ultraperipheral isobaric collisions
• Hot Spot model of Nucleon and Double Parton Scattering
• Neural network enhanced Bayesian global analysis of relativistic heavy ion collisions