CMB constraints on the fine structure constant
| dc.creator | Ichikawa, Kazuhide | |
| dc.creator | Kanzaki, Toru | |
| dc.creator | Kawasaki, Masahiro | |
| dc.date | 2006-02-27 | |
| dc.date | 2006-05-25 | |
| dc.date.accessioned | 2026-07-07T10:43:38Z | |
| dc.date.available | 2026-07-07T10:43:38Z | |
| dc.description | We study constraints on time variation of the fine structure constant alpha from cosmic microwave background (CMB) taking into account simultaneous change in alpha and the electron mass m_e which might be implied in unification theories. We obtain the constraints -0.097 < Delta alpha/alpha < 0.034 at 95% C.L. using WMAP data only, and -0.042 < Delta alpha/alpha < 0.026 combining with the constraint on the Hubble parameter by the HST Hubble Key Project. These are improved by 15% compared with constraints assuming only alpha varies. We discuss other relations between variations in alpha and m_e but we do not find evidence for varying alpha. | |
| dc.description | 19 pages, 8 figures | |
| dc.identifier | https://arxiv.org/abs/astro-ph/0602577 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/0602577 | |
| dc.identifier | Phys.Rev.D74:023515,2006 | |
| dc.identifier | doi:10.1103/PhysRevD.74.023515 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/182312 | |
| dc.subject | Astrophysics | |
| dc.title | CMB constraints on the fine structure constant | |
| dc.type | text |