Even Parity, Orbital Singlet and Spin Triplet Pairing for   Superconducting $La(O_{1-x}F_x)FeAs$
  In the present paper, we propose the parity even,orbital singlet and spin triplet pairing state as the ground state of the newly discovered super-conductor $LaO_{1-x}F_xFeAs$.The pairing mechanism involves both the special shape of the electron fermi surface and the strong ferromagnetic fluctuation induced by Hund's rule coupling.The special behavior of the Bogoliubov quasi-particle spectrum may leads to "Fermi arc" like anisotropy super-conducting gap, which can be detected by angle resolved photo emission(ARPES).The impurity effects are also discussed. 
Xi Dai, Zhong Fang, Yi Zhou, Fu-chun Zhang