Why Are Agentic Pull Requests Merged or Rejected? An Empirical Study. - Sien Reeve Ordonez Peralta; Fumika Hoshi; Hironori Washizaki; Naoyasu Ubayashi; Inase Kondo; Yoshiki Higo; Hiroki Mukai; Norihiro Yoshida; Kazuki Kusama; Hidetake Tanaka; Youmei Fan (CoRR, 2026)