NEWARK, N.J. — A woman accused of participating in a student visa pay-to-stay scam uncovered when authorities set up a fake university with no professors or classes was indicted on Tuesday by a federal grand jury. Ting Xue, a naturalized U.S. citizen who lives in New York City, used her consulting business to recruit foreign nationals to enroll in the fake university so they could fraudulently obtain or keep student or work visas, authorities said.