Considering the mass splitting between three active neutrinos , we represent the new constraints on the sum of neutrino mass \sum m _ { \nu } by updating the anisotropic analysis of Baryon Acoustic Oscillation ( BAO ) scale in the CMASS and LOWZ galaxy samples from Data Release 12 of the SDSS-III Baryon Oscillation Spectroscopic Survey ( BOSS DR12 ) .
Combining the BAO data of 6dFGS , MGS , LOWZ and CMASS with Planck  2015 data of temperature anisotropy and polarizations of Cosmic Microwave Background ( CMB ) , we find that the 95 \% C.L .
upper bounds on \sum m _ { \nu } refer to \sum m _ { \nu, NH } < 0.18 eV for normal hierarchy ( NH ) , \sum m _ { \nu, IH } < 0.20 eV for inverted hierarchy ( IH ) and \sum m _ { \nu, DH } < 0.15 eV for degenerate hierarchy ( DH ) respectively , and the normal hierarchy is slightly preferred than the inverted one ( \Delta \chi ^ { 2 } \equiv \chi ^ { 2 } _ { NH } - \chi ^ { 2 } _ { IH } \simeq - 3.4 ) .
In addition , the additional relativistic degrees of freedom and massive sterile neutrinos are neither favored at present .