Formation of millisecond pulsars - NS initial mass and EOS constraints

Recent measurement of a high millisecond pulsar mass (PSR J1614-2230, 1.97± 0.04 M ⊙ ) compared with the low mass of PSR J0751+1807 (1.26± 0.14 M ⊙ ) indicates a large span of masses of recycled pulsars and suggests a broad range of neutron stars masses at birth. We aim at reconstructing the pre-accretion masses for these pulsars while taking into account interaction of the magnetic field with a thin accretion disk, magnetic field decay and relativistic 2D solutions for stellar configurations for a set of equations of state. We briefly discuss the evolutionary scenarios leading to the formation of these neutron stars and study the influence of the equation of state.