Credit Suisse First Boston has lost one of its European banks analysts to Goldman Sachs, according to industry officials familiar with the move. Louise Pitt, who will continue to cover the banking sector at Goldman, left CSFB earlier in the month and her duties have been assumed by Leslie Mapondera for the time being. At Goldman, Pitt replaces Chuck Mounts, who left the firm in February to join UBS Warburg as co-head of European credit research. A spokeswoman at Goldman in London could not confirm the hire and senior research officials were on holiday and could not be reached for comment. Calls to Said Saffari, head of European credit research for CSFB in London, were not returned.