2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/142100Experimental results on beauty production at HERA are reviewed in the context of similar measurements at other colliders. As a result of a phenomenological study of the QCD scale dependence of many different NLO and NNLO predictions, a modification of the ``default'' scale choice is advocated. Experimental constraints on the photon-quark coupling are also investigated.contribution to DIS07, April 16-20, Munich, Germany; v2: correction of ref. 28High Energy Physics - Experimenttext