Considering the mass splitting between three active neutrinos, we represent
the new constraints on the sum of neutrino mass ∑mν 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 ∑mν refer to ∑mν,NH<0.18 eV for
normal hierarchy (NH), ∑mν,IH<0.20 eV for inverted hierarchy
(IH) and ∑mν,DH<0.15 eV for degenerate hierarchy (DH)
respectively, and the normal hierarchy is slightly preferred than the inverted
one (Δχ2≡χNH2−χIH2≃−3.4). In
addition, the additional relativistic degrees of freedom and massive sterile
neutrinos are neither favored at present.Comment: 12 pages, 3 tables, 1 figure; refs adde