2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/132816We calculate in perturbative QCD the transverse momentum broadening of vector bosons in heavy ion collisions at the Large Hadron Collider (LHC). We predict transverse momentum broadening of $W/Z$ bosons constructed from their leptonic decay channels, which should be a clean probe of initial-state medium effect. We also predict the upper limit of transverse momentum broadening of J/$ψ$ and $Υ$ production as a function of N$_{\rm part}$ at the LHC energy.2 pages, 2 figures. Contributed to Workshop on Heavy Ion Collisions at the LHC: Last Call for Predictions, Geneva, Switzerland, 14 May - 8 Jun 2007High Energy Physics - Phenomenologytext