Variations in the fine-structure constant constraining gravity theories

被引：2
|
作者：
Bezerra, V. B. [1 ]
Cunha, M. S. [2 ]
Muniz, C. R. [3 ]
Tahim, M. O. [4 ]
Vieira, H. S. [1 ,5 ]
机构：
[1] Univ Fed Paraiba, Dept Fis, Caixa Postal 5008, BR-58051970 Joao Pessoa, Paraiba, Brazil
[2] Univ Estadual Ceara, Fis Teor Grp, Ctr Ciencias & Tecnol, BR-60740000 Fortaleza, Ceara, Brazil
[3] Univ Estadual Ceara, Fis Teor Grp, Fac Educ Ciencias & Letras Iguatu, Iguatu, Ceara, Brazil
[4] Univ Estadual Ceara, Fis Teor Grp, Fac Educ Ciencias & Letras Sertao Cent, Quixada, Ceara, Brazil
[5] Univ Estadual Paraiba, Ctr Ciencias Tecnol & Saude, BR-58233000 Araruna, PB, Brazil
来源：
EPL | 2016年 / 115卷 / 04期
关键词：
FUNDAMENTAL CONSTANTS; TIME-VARIATION;
D O I：
10.1209/0295-5075/115/40004
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
In this paper, we investigate how the fine-structure constant, a, locally varies in the presence of a static and spherically symmetric gravitational source. The procedure consists in calculating the solution and the energy eigenvalues of a massive scalar field around that source, considering the weak-field regime. From this result, we obtain expressions for a spatially variable fine-structure constant by considering suitable modifications in the involved parameters admitting some scenarios of semi-classical and quantum gravities. Constraints on free parameters of the approached theories are calculated from astrophysical observations of the emission spectra of a white dwarf. Such constraints are finally compared with those obtained in the literature. Copyright (C) EPLA, 2016
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页数：7
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