Former Boston Red Sox hero Luis Tiant will visit Wesleyan on April 7 to attend a screening of “Lost Son of Havana,” a 2009 film about the charismatic pitcher and Cuban émigré’s first return to his homeland in 46 years. The screening and a subsequent discussion with Tiant and Emmy Award-winning filmmaker Jonathan Hock are part of the Center for the Americas’ 2011 Americas Forum, which will take place on campus April 7-8. The forum, “Sports Documentary Filmmakers in the Americas: The Politics of Access,” also will feature a screening of “The Two Escobars,” a documentary by Jeffrey and Michael…