Weighing neutrinos in the presence of a running primordial spectral index astro-ph/0605742 Bo Feng, Jun-Qing Xia, Jun'ichi Yokoyama, Xinmin Zhang GongBo Zhao observations from galaxy clustering and Type Ia Supernovae cal The three-year WMAP(WMAP3), combined with other cosmolo prefers a non-vanishing running of the primordial spectral index independent of the low CMB multipoles. motivated by this feature we study cosmological constraint on the neutrino mass, which severely depends on what prior we adopt for the spectral shape of primordial fluctuations, taking possible running into account. As a result we find a more stringent constraint on the sum of the three neutrino masses Inu<0. 76 eV(2 sigma), compared with the case where power-law prior is adopted to the primordial spectral shape
Weighing neutrinos in the presence of a running primordial spectral index astro-ph/0605742 ⚫ Bo Feng, Jun-Qing Xia, Jun'ichi Yokoyama, Xinmin Zhang, Gong-Bo Zhao The three-year WMAP(WMAP3), combined with other cosmological observations from galaxy clustering and Type Ia Supernova (SNIa), prefers a non-vanishing running of the primordial spectral index independent of the low CMB multipoles. Motivated by this feature we study cosmological constraint on the neutrino mass, which severely depends on what prior we adopt for the spectral shape of primordial fluctuations, taking possible running into account. As a result we find a more stringent constraint on the sum of the three neutrino masses, m_\nu < 0.76 eV (2 \sigma), compared with the case where power-law prior is adopted to the primordial spectral shape
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