Robust cosmological bounds on neutrinos and their combination with oscillation results

被引：84

作者：

Gonzalez-Garcia, M. C. ^{[1
,2
,3
]}

Maltoni, Michele ^{[4
]}

Salvado, Jordi ^{[2
,3
]}

机构：

[1] SUNY Stony Brook, CN Yang Inst Theoret Phys, Stony Brook, NY 11794 USA

[2] Univ Barcelona, ICREA, Dept Estructura & Constituents Mat, E-08028 Barcelona, Spain

[3] Univ Barcelona, Inst Ciencies Cosmos, E-08028 Barcelona, Spain

[4] Univ Autonoma Madrid, Inst Fis Teor UAM CSIC, Fac Ciencias, E-28049 Madrid, Spain

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2010年 / 08期

关键词：

Cosmology of Theories beyond the SM; Neutrino Physics; MICROWAVE BACKGROUND ANISOTROPIES; ANGULAR POWER SPECTRUM; DOUBLE-BETA DECAY; MASSIVE NEUTRINOS; CONSTRAINTS; MASSES; PROBE; POLARIZATION; TEMPERATURE; PARAMETERS;

D O I：

10.1007/JHEP08(2010)117

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

We perform a global analysis of cosmological observables in generalized cosmologies which depart from Lambda CDM models by allowing non-vanishing curvature Omega(k) not equal 0, dark energy with equation of state with omega not equal -1, the presence of additional relativistic degrees of freedom Delta N-rel, and neutrino masses Omega(nu) not equal 0. By combining the data from cosmic microwave background (CMB) experiments (in particular the latest results from WMAP-7), the present day Hubble constant (H0) measurement, the high-redshift Type-I supernovae (SN) results and the information from large scale structure (LSS) surveys, we determine the parameters in the 10-dimensional parameter space for such models. We present the results from the analysis when the full shape information from the LSS matter power spectrum (LSSPS) is included versus when only the corresponding distance measurement from the baryon acoustic oscillations (BAO) is accounted for. We compare the bounds on the neutrino mass scale in these generalized scenarios with those obtained for the 6+ 1 parameter analysis in Lambda CDM + m(nu) models and we also study the dependence of those on the set of observables included in the analysis. Finally we combine these results with the information on neutrino mass differences and mixing from the global analysis of neutrino oscillation experiments and derive the presently allowed ranges for the two laboratory probes of the absolute scale of neutrino mass: the effective electron neutrino mass in single beta decay and the effective Majorana neutrino mass in neutrinoless beta beta decay.

引用

页数：19

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