dorsal/arxiv
View SchemaRotatable-Torsion-Balance Equivalence Principleexperiment for the Spin-Polarized Hofe_{3}
| Authors | Li-Shing Hou, Wei-Tou Ni |
|---|---|
| Categories | |
| ArXiv ID | physics/0009013 |
| URL | https://arxiv.org/abs/physics/0009013 |
| DOI | 10.1142/S0217732301003619 |
Abstract
We use a rotatable torsion balance to perform an equivalence principle test on a magnetically shielded spin-polarized body of HoFe_{3}. With a rotation period of one hour, the period of possible signal is reduced from one solar day by 24 times, and hence the 1/f noise is greatly reduced. Our present experimental results gives a limit (0.25 +- 1.26) X 10^{-9} on the Eotvos parameter \eta of equivalence of the polarized body compared with unpolarized aluminium-brass cylinders in the solar gravitional field, and a limit (0.34 +- 0.52) X 10^{-9} in the earth gravitional fields. This improves the previous limit on polarized bodies by a factor of 45 for solar field and by a factor of 11 for earth field.
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"abstract": "We use a rotatable torsion balance to perform an equivalence principle test\non a magnetically shielded spin-polarized body of HoFe_{3}. With a rotation\nperiod of one hour, the period of possible signal is reduced from one solar day\nby 24 times, and hence the 1/f noise is greatly reduced. Our present\nexperimental results gives a limit (0.25 +- 1.26) X 10^{-9} on the Eotvos\nparameter \\eta of equivalence of the polarized body compared with unpolarized\naluminium-brass cylinders in the solar gravitional field, and a limit (0.34 +-\n0.52) X 10^{-9} in the earth gravitional fields. This improves the previous\nlimit on polarized bodies by a factor of 45 for solar field and by a factor of\n11 for earth field.",
"arxiv_id": "physics/0009013",
"authors": [
"Li-Shing Hou",
"Wei-Tou Ni"
],
"categories": [
"physics.space-ph"
],
"doi": "10.1142/S0217732301003619",
"title": "Rotatable-Torsion-Balance Equivalence Principleexperiment for the Spin-Polarized Hofe_{3}",
"url": "https://arxiv.org/abs/physics/0009013"
},
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