KERRY BEATS DEAN IN NEW HAMPSHIRE FOR A 2ND VICTORY
Sen John Kerry wins New Hampshire Democratic presidential primary, again defeating Howard Dean, who places second; wins some 39 percent of vote, to 26 percent for Dean; Sen John Edwards and Gen Wesley K Clark virtually tie for distant third with 12 percent each; Sen Joseph I Lieberman wins 9 percent of vote and Rep Dennis J Kucinich 1 percent; aides to Edwards, Clark and Lieberman vow to challenge Kerry in next week's primaries in seven states; Dean tries to portray his showing as win; his aides say they are looking to Mar 2 primaries in California and New York as places where he will do well; tables and graphs of primary results; photos (M)