ROME (AP).- Italian researchers said Tuesday they will dig up bones in a Florence convent to try to identify the remains of a Renaissance woman long believed to be the model for the “Mona Lisa.” If successful, the research might help ascertain the identity of the woman depicted in Leonardo da Vinci’s masterpiece — a mystery that has puzzled scholars and art lovers for centuries and generated countless theories. The project launched Tuesday aims to locate the remains of Lisa Gherardini, the wife of a rich silk merchant named Francesco del Giocondo. Tradition has long linked Gherardini to the painting, which is known in Italian as “La Gioconda” and in French as “La Joconde.” Giorgio Vasari, a 16th-century