New limits on the variability of G from big bang nucleosynthesis

Frank S. Accetta, Lawrence Krauss, Paul Romanelli

Research output: Contribution to journalArticle

103 Citations (Scopus)

Abstract

We revise limits on the value of G during primordial nucleosynthesis by incorporating new measurements of the neutron half-life along with the most recent reaction rate uncertainties. In doing this we follow D, 3He, and 7Li as G varies to determine how this variation affects limits on the baryon-to-photon ratio (μ). We then incorporate these new limits into the 4He predictions to limit G as a function of the number of relativistic species at the time of nucleosynthesis. If the number of such species (≥2) is not greater than the upper limit on the number of light neutrinos measured at CERN and the primordial abundance of 4He was between (22-25)%, then 1.4>Gnucl Gtoday>0.7. If G(t) ≈ t, this would translate into a limit 0.008>α>-0.009, or an approximate limit ( G G)today<±9×10-13yr-1.

Original languageEnglish (US)
Pages (from-to)146-150
Number of pages5
JournalPhysics Letters B
Volume248
Issue number1-2
DOIs
StatePublished - Sep 27 1990
Externally publishedYes

Fingerprint

nuclear fusion
half life
baryons
reaction kinetics
neutrinos
neutrons
photons
predictions

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

New limits on the variability of G from big bang nucleosynthesis. / Accetta, Frank S.; Krauss, Lawrence; Romanelli, Paul.

In: Physics Letters B, Vol. 248, No. 1-2, 27.09.1990, p. 146-150.

Research output: Contribution to journalArticle

Accetta, Frank S. ; Krauss, Lawrence ; Romanelli, Paul. / New limits on the variability of G from big bang nucleosynthesis. In: Physics Letters B. 1990 ; Vol. 248, No. 1-2. pp. 146-150.
@article{b7f5d9832af0436ca1266b1a34894549,
title = "New limits on the variability of G from big bang nucleosynthesis",
abstract = "We revise limits on the value of G during primordial nucleosynthesis by incorporating new measurements of the neutron half-life along with the most recent reaction rate uncertainties. In doing this we follow D, 3He, and 7Li as G varies to determine how this variation affects limits on the baryon-to-photon ratio (μ). We then incorporate these new limits into the 4He predictions to limit G as a function of the number of relativistic species at the time of nucleosynthesis. If the number of such species (≥2) is not greater than the upper limit on the number of light neutrinos measured at CERN and the primordial abundance of 4He was between (22-25){\%}, then 1.4>Gnucl Gtoday>0.7. If G(t) ≈ t-α, this would translate into a limit 0.008>α>-0.009, or an approximate limit ( G G)today<±9×10-13yr-1.",
author = "Accetta, {Frank S.} and Lawrence Krauss and Paul Romanelli",
year = "1990",
month = "9",
day = "27",
doi = "10.1016/0370-2693(90)90029-6",
language = "English (US)",
volume = "248",
pages = "146--150",
journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",
issn = "0370-2693",
publisher = "Elsevier",
number = "1-2",

}

TY - JOUR

T1 - New limits on the variability of G from big bang nucleosynthesis

AU - Accetta, Frank S.

AU - Krauss, Lawrence

AU - Romanelli, Paul

PY - 1990/9/27

Y1 - 1990/9/27

N2 - We revise limits on the value of G during primordial nucleosynthesis by incorporating new measurements of the neutron half-life along with the most recent reaction rate uncertainties. In doing this we follow D, 3He, and 7Li as G varies to determine how this variation affects limits on the baryon-to-photon ratio (μ). We then incorporate these new limits into the 4He predictions to limit G as a function of the number of relativistic species at the time of nucleosynthesis. If the number of such species (≥2) is not greater than the upper limit on the number of light neutrinos measured at CERN and the primordial abundance of 4He was between (22-25)%, then 1.4>Gnucl Gtoday>0.7. If G(t) ≈ t-α, this would translate into a limit 0.008>α>-0.009, or an approximate limit ( G G)today<±9×10-13yr-1.

AB - We revise limits on the value of G during primordial nucleosynthesis by incorporating new measurements of the neutron half-life along with the most recent reaction rate uncertainties. In doing this we follow D, 3He, and 7Li as G varies to determine how this variation affects limits on the baryon-to-photon ratio (μ). We then incorporate these new limits into the 4He predictions to limit G as a function of the number of relativistic species at the time of nucleosynthesis. If the number of such species (≥2) is not greater than the upper limit on the number of light neutrinos measured at CERN and the primordial abundance of 4He was between (22-25)%, then 1.4>Gnucl Gtoday>0.7. If G(t) ≈ t-α, this would translate into a limit 0.008>α>-0.009, or an approximate limit ( G G)today<±9×10-13yr-1.

UR - http://www.scopus.com/inward/record.url?scp=0001684533&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0001684533&partnerID=8YFLogxK

U2 - 10.1016/0370-2693(90)90029-6

DO - 10.1016/0370-2693(90)90029-6

M3 - Article

VL - 248

SP - 146

EP - 150

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

SN - 0370-2693

IS - 1-2

ER -