"Pathways to the Metaverse": Exploring the User Experience Mechanisms Driving Technology Acceptance in Virtual Lab Visits with an LLM-powered Avatar. - Xinyi Tu 001; Francesco Biondani; Danial Amin 001; Angelica Fabillar; Trang Thi Thu Xuan; Huma Bano Adeel; Sonja M. H. Tervola; Carlo Berlingeri; Franco Fummi; Joni Salminen; Bernard J. Jansen (IUI, 2026)