The Uncertainty in Newton's Constant and Precision Predictions of the Primordial Helium Abundance
| dc.creator | Scherrer, Robert J. | |
| dc.date | 2003-10-23 | |
| dc.date | 2004-02-13 | |
| dc.date.accessioned | 2026-07-07T12:00:57Z | |
| dc.date.available | 2026-07-07T12:00:57Z | |
| dc.description | The current uncertainty in Newton's constant, G_N, is of the order of 0.15%. For values of the baryon to photon ratio consistent with both cosmic microwave background observations and the primordial deuterium abundance, this uncertainty in G_N corresponds to an uncertainty in the primordial 4He mass fraction, Y_P, of +-1.3 x 10^{-4}. This uncertainty in Y_P is comparable to the effect from the current uncertainty in the neutron lifetime, which is often treated as the dominant uncertainty in calculations of Y_P. Recent measurements of G_N seem to be converging within a smaller range; a reduction in the estimated error on G_N by a factor of 10 would essentially eliminate it as a source of uncertainty in the calculation of the primordial 4He abundance. | |
| dc.description | 3 pages, no figures, fixed typos, to appear in Phys. Rev. D | |
| dc.identifier | https://arxiv.org/abs/astro-ph/0310699 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/0310699 | |
| dc.identifier | Phys.Rev.D69:107302,2004 | |
| dc.identifier | doi:10.1103/PhysRevD.69.107302 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/206955 | |
| dc.subject | Astrophysics | |
| dc.title | The Uncertainty in Newton's Constant and Precision Predictions of the Primordial Helium Abundance | |
| dc.type | text |