CONSTRAINTS ON BACKGROUND TORSION FROM BIREFRINGENCE OF CMB POLARIZATION

被引：11

作者：

Das, Moumita ^{[1
]}

Mohanty, Subhendra ^{[1
]}

Prasanna, A. R. ^{[2
]}

机构：

[1] Phys Res Lab, Ahmadabad 380009, Gujarat, India

[2] LJ Inst Comp Applicat, Ahmadabad, Gujarat, India

来源：

INTERNATIONAL JOURNAL OF MODERN PHYSICS D | 2013年 / 22卷 / 03期

关键词：

CMB polarization; birefringence; torsion; PROPAGATING TORSION; MASSLESS; FIELD;

D O I：

10.1142/S0218271813500119

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We show that a nonminimal coupling of electromagnetism with background torsion can produce birefringence of the electromagnetic waves. This birefringence gives rise to a B-mode polarization of the CMB. From the bounds on CMB polarization from QUaD experiment, one can put limits on the background torsion xi T-1(i) = (2.78 +/- 4.85) x 10(-20) GeV-1.

引用

页数：10

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