dorsal/arxiv
View SchemaHow changing physical constants and violation of local position invariance may occur?
| Authors | V. V. Flambaum, E. V. Shuryak |
|---|---|
| Categories | |
| ArXiv ID | physics/0701220 |
| URL | https://arxiv.org/abs/physics/0701220 |
| DOI | 10.1063/1.2915601 |
| Journal | AIP Conf.Proc.995:1-11,2008 |
Abstract
Light scalar fields very naturally appear in modern cosmological models, affecting such parameters of Standard Model as electromagnetic fine structure constant $\alpha$, dimensionless ratios of electron or quark mass to the QCD scale, $m_{e,q}/\Lambda_{QCD}$. Cosmological variations of these scalar fields should occur because of drastic changes of matter composition in Universe: the latest such event is rather recent (redshift $z\sim 0.5$), from matter to dark energy domination. In a two-brane model (we use as a pedagogical example) these modifications are due to changing distance to "the second brane", a massive companion of "our brane". Back from extra dimensions, massive bodies (stars or galaxies) can also affect physical constants. They have large scalar charge $Q_d$ proportional to number of particles which produces a Coulomb-like scalar field $\phi=Q_d/r$. This leads to a variation of the fundamental constants proportional to the gravitational potential, e.g. $\delta \alpha/ \alpha = k_\alpha \delta (GM/ r c^2)$. We compare different manifestations of this effect. The strongest limits $k_\alpha +0.17 k_e= (-3.5\pm 6) * 10^{-7}$ are obtained from the measurements of dependence of atomic frequencies on the distance from Sun (the distance varies due to the ellipticity of the Earth's orbit).
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"abstract": "Light scalar fields very naturally appear in modern cosmological models,\naffecting such parameters of Standard Model as electromagnetic fine structure\nconstant $\\alpha$, dimensionless ratios of electron or quark mass to the QCD\nscale, $m_{e,q}/\\Lambda_{QCD}$. Cosmological variations of these scalar fields\nshould occur because of drastic changes of matter composition in Universe: the\nlatest such event is rather recent (redshift $z\\sim 0.5$), from matter to dark\nenergy domination. In a two-brane model (we use as a pedagogical example) these\nmodifications are due to changing distance to \"the second brane\", a massive\ncompanion of \"our brane\". Back from extra dimensions, massive bodies (stars or\ngalaxies) can also affect physical constants. They have large scalar charge\n$Q_d$ proportional to number of particles which produces a Coulomb-like scalar\nfield $\\phi=Q_d/r$. This leads to a variation of the fundamental constants\nproportional to the gravitational potential, e.g. $\\delta \\alpha/ \\alpha =\nk_\\alpha \\delta (GM/ r c^2)$. We compare different manifestations of this\neffect. The strongest limits $k_\\alpha +0.17 k_e= (-3.5\\pm 6) * 10^{-7}$ are\nobtained from the measurements of dependence of atomic frequencies on the\ndistance from Sun (the distance varies due to the ellipticity of the Earth\u0027s\norbit).",
"arxiv_id": "physics/0701220",
"authors": [
"V. V. Flambaum",
"E. V. Shuryak"
],
"categories": [
"physics.atom-ph",
"astro-ph",
"gr-qc",
"hep-ph",
"nucl-th"
],
"doi": "10.1063/1.2915601",
"journal_ref": "AIP Conf.Proc.995:1-11,2008",
"title": "How changing physical constants and violation of local position invariance may occur?",
"url": "https://arxiv.org/abs/physics/0701220"
},
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