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Cosmological implications of neutrinos are reviewed. The subjects considered involve: (a) bounds on neutrino mass from the observational limits on the universe age and the Hubble constant both in cosmology with and without cosmological…

High Energy Physics - Phenomenology · Physics 2008-11-26 A. D. Dolgov

We present here up-to-date neutrino mass limits exploiting the most recent cosmological data sets. By making use of the Cosmic Microwave Background temperature fluctuation and polarization measurements, Supernovae Ia luminosity distances,…

Cosmology and Nongalactic Astrophysics · Physics 2021-10-06 Eleonora Di Valentino , Stefano Gariazzo , Olga Mena

We determine the upper limit on the mass of the lightest neutrino from the most robust recent cosmological and terrestrial data. Marginalizing over possible effective relativistic degrees of freedom at early times ($N_\mathrm{eff}$) and…

Light dark matter is a compelling experimental target in light of stringent constraints on heavier WIMPs. However, for a sub-MeV WIMP, the universe is sufficiently well understood at temperatures below 10 MeV that there is no room for it to…

High Energy Physics - Phenomenology · Physics 2018-03-02 Daniel Green , Surjeet Rajendran

Physics beyond the standard model might imply the cosmological production of particles with grand unification scale energies. Nucleons and gamma-rays from such processes are candidates for the cosmic rays observed beyond 100 EeV [10**(20)…

Astrophysics · Physics 2009-10-28 Guenter Sigl , Sangjin Lee , David N. Schramm , Paolo Coppi

In this brief report we consider couplings of the dark energy scalar, such as Quintessence to the neutrinos and discuss its implications in studies on the neutrino mass limits from Baryogenesis. During the evolution of the dark energy…

High Energy Physics - Phenomenology · Physics 2008-11-26 Peihong Gu , Xiulian Wang , Xinmin Zhang

Cosmology can provide information on the absolute scale of neutrino masses, complementary to the results of tritium beta decay and neutrinoless double beta decay experiments. We show how the analysis of data from the anisotropies of the…

High Energy Physics - Phenomenology · Physics 2007-05-23 Sergio Pastor

This is a review article about the most recent developments on the field of neutrino mass. The first part of the review introduces the idea of neutrino masses and mixing angles, summarizes the most recent experimental data then discusses…

Popular Physics · Physics 2009-11-13 S. F. King

The current status of neutrino cosmology is reviewed, from the question of neutrino decoupling and the presence of sterile neutrinos to the effects of neutrinos on the cosmic microwave background and large scale structure. Particular…

High Energy Physics - Phenomenology · Physics 2009-11-10 Steen Hannestad

We present the strongest current cosmological upper limit on the sum of neutrino masses of < 0.18 (95% confidence). It is obtained by adding observations of the large-scale matter power spectrum from the WiggleZ Dark Energy Survey to…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-16 Signe Riemer-Sørensen , David Parkinson , Tamara M. Davis

The small-scale power spectrum of the cosmological matter distribution together with other cosmological data provides a sensitive measure of the hot dark matter fraction, leading to restrictive neutrino mass limits. We extend this argument…

High Energy Physics - Phenomenology · Physics 2009-11-10 Steen Hannestad , Georg Raffelt

Recent progress in neutrino physics has been rapid, to a large extent thanks to observations of neutrinos produced in astrophysical environments. Here, we review the current standing on such questions as neutrino masses and mixings,…

High Energy Physics - Phenomenology · Physics 2007-05-23 Steen Hannestad

We present a new upper limit of sum m_{\nu} eV < 0.28 (95% CL) on the sum of the neutrino masses assuming a flat LCDM cosmology. This relaxes slightly to sum m_{\nu} < 0.34 and sum m_{\nu} < 0.47 when quasi non-linear scales are removed and…

Cosmology and Nongalactic Astrophysics · Physics 2014-11-20 Shaun A. Thomas , Filipe B. Abdalla , Ofer Lahav

We derive upper limits on the sum of neutrino masses from an updated combination of data from Cosmic Microwave Background experiments and Galaxy Redshifts Surveys. The results are discussed in the context of three-flavor neutrino mixing and…

Astrophysics · Physics 2009-10-07 A. Melchiorri , G. L. Fogli , E. Lisi , A. Marrone , A. Palazzo , P. Serra , J. I. Silk

It is shown that the tension between recent neutrino oscillation experiments, favoring sterile neutrinos with masses of the order of 1 eV, and cosmological data which impose stringent constraints on neutrino masses from the free streaming…

Cosmology and Nongalactic Astrophysics · Physics 2013-03-27 Hayato Motohashi , Alexei A. Starobinsky , Jun'ichi Yokoyama

New physics beyond the electroweak scale may increase weak interaction cross sections beyond the Standard Model predictions. Such cross sections can be expected within theories that solve the hierarchy problem of known interactions with a…

High Energy Physics - Phenomenology · Physics 2009-10-31 Craig Tyler , Angela V. Olinto , Guenter Sigl

Neutrinos are the second most abundant particle in the universe. Since the last 50 years, Neutrino physics has been a source of limelight in modern physics because of the incredible characteristics of this elusive particle. According to the…

High Energy Physics - Phenomenology · Physics 2021-04-13 Athar Ahmad , Naila Islam

We combine the most recent observations of large-scale structure (2dF and SDSS galaxy surveys) and cosmic microwave anisotropies (WMAP and ACBAR) to put constraints on flat cosmological models where the number of massive neutrinos and of…

High Energy Physics - Phenomenology · Physics 2008-11-26 Patrick Crotty , Julien Lesgourgues , Sergio Pastor

This is a summary of a series of lectures on the current experimental and theoretical status of our understanding of origin and nature of cosmic radiation. Specific focus is put on ultra-high energy cosmic radiation above ~10^17 eV,…

High Energy Astrophysical Phenomena · Physics 2012-02-03 Guenter Sigl

Recent (first or/and the best) results from the neutrino experiments are reviewed and their implications for the theory are discussed. The sense of the experiments is the searching for neutrino masses, mixing and interactions beyond the…

High Energy Physics - Phenomenology · Physics 2009-09-25 Alexei Yu. Smirnov