Bayesian reweighting of nuclear parton distributions with coherent J/psi photoproduction data yields a lead gluon modification factor of about 0.60 at x=1e-4, implying strong gluon shadowing.
Bayesian Reweighting for Global Fits
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abstract
Two different techniques for adding additional data sets to existing global fits using Bayesian reweighting have been proposed in the literature. The derivation of each reweighting formalism is critically reviewed. A simple example is constructed that conclusively favors one of the two formalisms. The effects of this choice for global fits is discussed.
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Probing Gluon Shadowing in Heavy Nuclei through Bayesian Reweighting of J/$\psi$ Photoproduction in Ultra-Peripheral Collisions
Bayesian reweighting of nuclear parton distributions with coherent J/psi photoproduction data yields a lead gluon modification factor of about 0.60 at x=1e-4, implying strong gluon shadowing.