Consistency of the nonflat ΛCDM model with the new result from BOSS.

Using 137,562 quasars in the redshift range 2.1 ≤ z ≤ 3.5 from the data release 11 (DR11) of the baryon oscillation spectroscopic survey (BOSS) of Sloan Digital Sky Survey (SDSS)-III, the BOSS-SDSS collaboration estimated the expansion rate H[z = 2.34) = 222 ± 7 km/s/Mpc of the Universe, and reported that this value is in tension with the predictions of flat ΛCDM model at around a 2.5a level. In this paper, we briefly describe some attempts made in the literature to relieve the tension, and show that the tension can naturally be alleviated in a nonflat ΛCDM model with positive curvature. We also perform the observational consistency check by considering the constraints on the nonflat ΛCDM model from Planck, WP and B AO data. We find that the nonflat ΛCDM model constrained with Planck + WP data fits better to the line of sight measurement H(z = 2.34) = 222 ± 7 km/s/Mpc, but only at the expense of still having a poor fit to the BAO transverse measurements. [ABSTRACT FROM AUTHOR]