Neutrino Mass Bounds in the Era of Tension Cosmology

Abstract The measurements of cosmic microwave background (CMB) anisotropies made by the Planck satellite provide extremely tight upper bounds on total neutrino mass scale (? m ? < 0.26 eV at 95% C.L.). However, as recently discussed in literature, data show anomalies that could affect this result. Here we new constraints masses using recent and complementary CMB from Atacama Cosmology Telescope DR4 South Pole SPT-3G experiments. We found both ACT-DR4 data, when combined with WMAP, mildly suggest a ? = 0.68 ± 0.31 0.46 ? 0.36 + 0.14 68% C.L., respectively. Moreover, lensing experiment is included, now indicate above two standard deviations, ${\rm{\Sigma }}{m}_{\nu }={0.60}_{-0.50}^{+0.44}$?> ? m ? = 0.60 0.50 0.44 while WMAP+SPT-3G provides weak limit 0.37 C.L. Interestingly, these results are consistent CMB+lensing constraint }={0.41}_{-0.25}^{+0.17}$?> 0.41 0.25 0.17 variations A lens parameter considered. also indications still present after inclusion BAO or Type Ia supernova extended cosmologies usually considered to solve so-called Hubble tension. In respect, note models, CMB+BAO prefer higher for values constant. combination ACT-DR4, BAO, constant SH0ES collaboration gives }={0.39}_{-0.25}^{+0.13}$?> 0.39 0.13 cosmologies.