https://doi.org/10.1140/epjc/s10052-016-4334-z
Regular Article - Theoretical Physics
Constraints on the neutrino mass and mass hierarchy from cosmological observations
1
Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing, 100190, China
2
School of Physical Sciences, University of Chinese Academy of Sciences, No. 19A Yuquan Road, Beijing, 100049, China
* e-mail: wangke@itp.ac.cn
Received:
24
March
2016
Accepted:
20
August
2016
Published online:
6
September
2016
Considering the mass splitting between three active neutrinos, we represent the new constraints on the sum of neutrino mass 
by updating the anisotropic analysis of the 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 
2015 data of temperature anisotropy and polarizations of the Cosmic Microwave Background (CMB), we find that the 95 % C.L. upper bounds on refer to 
eV for the normal hierarchy (NH), 
eV for the inverted hierarchy (IH) and 
eV for the degenerate hierarchy (DH), respectively, and the normal hierarchy is slightly preferred over the inverted one (
). In addition, the additional relativistic degrees of freedom and massive sterile neutrinos are neither favored at present.
© The Author(s), 2016
