A Bitter Pill: The Primordial Lithium Problem Worsens

Abstract

The lithium problem arises from the significant discrepancy between the primordial 7Li abundance as predicted by BBN theory and the WMAP baryon density, and the pre-Galactic lithium abundance inferred from observations of metal-poor (Population II) stars. This problem has loomed for the past decade, with a persistent discrepancy of a factor of 2--3 in 7Li/H. Recent developments have sharpened all aspects of the Li problem. Namely: (1) BBN theory predictions have sharpened due to new nuclear data, particularly the uncertainty on 3He(alpha,gamma)7Be, has reduced to 7.4%, and with a central value shift of ~ +0.04 keV barn. (2) The WMAP 5-year data now yields a cosmic baryon density with an uncertainty reduced to 2.7%. (3) Observations of metal-poor stars have tested for systematic effects, and have reaped new lithium isotopic data. With these, we now find that the BBN+WMAP predicts 7Li/H = (5.24+0.71-0.67) 10^{-10}. The Li problem remains and indeed is exacerbated; the discrepancy is now a factor 2.4--4.3 or 4.2sigma (from globular cluster stars) to 5.3sigma (from halo field stars). Possible resolutions to the lithium problem are briefly reviewed, and key nuclear, particle, and astronomical measurements highlighted.

21 pages, 4 figures. Comments welcome

References in corpus (61)

• First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Determination of Cosmological Parameters
• First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Preliminary Maps and Basic Results
• The Cosmological Parameters 2006
• Big-Bang nucleosynthesis (Particle Data Group mini-review)
• Solar Models: current epoch and time dependences, neutrinos, and helioseismological properties
• Measurement of the Total Active 8B Solar Neutrino Flux at the Sudbury Neutrino Observatory with Enhanced Neutral Current Sensitivity
• Solar Fusion Cross Sections
• Primordial Nucleosynthesis in the Precision Cosmology Era
• Lithium isotopic abundances in metal-poor halo stars
• Primordial Nucleosynthesis: Theory and Observations
• Updated Big Bang Nucleosynthesis confronted to WMAP observations and to the Abundance of Light Elements
• A probable stellar solution to the cosmological lithium discrepancy
• Measurement of the neutron lifetime using a gravitational trap and a low-temperature Fomblin coating
• The Spite Lithium Plateau: Ultra-Thin but Post-Primordial
• Primordial Lithium and Big Bang Nucleosynthesis
• Primordial Nucleosynthesis for the New Cosmology: Determining Uncertainties and Examining Concordance
• Primordial Nucleosynthesis in Light of WMAP
• Did Something Decay, Evaporate, or Annihilate during Big Bang Nucleosynthesis?
• Implications of WMAP observations on Li abundance and stellar evolution models
• Supergravity with a Gravitino LSP
• A Realistic Determination of the Error on the Primordial Helium Abundance: Steps Toward Non-Parametric Nebular Helium Abundances
• First stars VII. Lithium in extremely metal poor dwarfs
• Coupled Variations of Fundamental Couplings and Primordial Nucleosynthesis
• Reappraising the Spite Lithium Plateau: Extremely Thin and Marginally Consistent with WMAP
• Bound-State Effects on Light-Element Abundances in Gravitino Dark Matter Scenarios
• Astrophysical S-factor of the 3He(alpha,gamma)7Be reaction measured at low energy via prompt and delayed gamma detection
• Halo Star Lithium Depletion
• The NACRE Thermonuclear Reaction Compilation and Big Bang Nucleosynthesis
• A New Precision Measurement of the 3He(4He,gamma)7Be Cross section
• The lithium content of the globular cluster NGC 6397
• Precision Calculation of n+p->d+gamma Cross Section for Big-Bang Nucleosynthesis
• Present status of primordial nucleosynthesis after WMAP: results from a new BBN code
• Neutrino Reactions on Deuteron
• Effects of Unstable Particles on Light-Element Abundances: Lithium versus Deuterium and He3
• Radiative neutron capture on a proton at BBN energies
• Stellar Mixing and the Primordial Lithium Abundance
• Cosmological variation of deuteron binding energy, strong interaction and quark masses from big bang nucleosynthesis
• 3He(alpha,gamma)7Be cross section at low energies
• Neutrino-deuteron reactions at solar neutrino energies
• Solving the Cosmic Lithium Problems with Gravitino Dark Matter in the CMSSM
• The 3He + 4He --> 7Be Astrophysical S-factor
• The Evolution of Li6 in Standard Cosmic-Ray Nucleosynthesis
• Solar Neutrino Constraints on the BBN Production of Li
• The 7Be(d,p)2alpha cross section at Big Bang energies and the primordial 7Li abundance
• Primordial Nucleosynthesis with CMB Inputs: Probing the Early Universe and Light Element Astrophysics
• VLT Observations of Turnoff stars in the Globular Cluster NGC 6397
• Lithium-6 : Evolution from Big Bang to Present
• Primordial Helium Abundance: A Reanalysis of the Izotov-Thuan Spectroscopic Sample
• Element Segregation in Low Metallicity Stars and the Primordial Lithium Abundance
• On the baryometric status of He3
• Constraints on Omega_B from the nucleosynthesis of 7Li in the standard Big Bang
• Cosmological Cosmic Rays and the observed Li6 plateau in metal poor halo stars
• Population III Generated Cosmic Rays and the Production of Li6
• On the lithium content of the globular cluster M92
• Low Mass Stars and the He3 Problem
• Implications of a new temperature scale for halo dwarfs on LiBeB and chemical evolution
• Cosmic Ray production of Beryllium and Boron at high redshift
• Cosmological Recombination of Lithium and its Effect on the Microwave Background Anisotropies
• The Imprint of Lithium Recombination on the Microwave Background Anisotropies
• Probing Primordial and Pre-Galactic Lithium with High Velocity Clouds
• Cosmological Cosmic Rays: Sharpening the Primordial Lithium Problem

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