The dark side of the proton

A bstract We study the sensitivity of High-Luminosity LHC to a light baryonic dark photon B , primarily coupled quarks, as constituent proton. This is achieved by allowing for parton distribution function (PDF) in PDF evolution equations. Depending on mass and coupling photon, standard quark gluon PDFs distorted varying degrees. By analysing effect tails Drell-Yan invariant distributions, we demonstrate potential determining competitive bounds parameter space.