Neutrino and Axion Bounds from the Globular Cluster M5 ( NGC 5904)

被引：189

作者：

Viaux, N. ^{[1
,2
,3
]}

Catelan, M. ^{[1
,2
,3
]}

Stetson, P. B. ^{[4
]}

Raffelt, G. G. ^{[5
]}

Redondo, J. ^{[5
,6
]}

Valcarce, A. A. R. ^{[7
]}

Weiss, A. ^{[8
]}

机构：

[1] Pontificia Univ Catolica Chile, Fac Fis, Inst Astrofis, Santiago 7820436, Chile

[2] Pontificia Univ Catolica Chile, Ctr Astroingn, Santiago 7820436, Chile

[3] Milky Way Millennium Nucleus, Santiago 7820436, Chile

[4] Natl Res Council Canada, Victoria, BC V9E 2E7, Canada

[5] Max Planck Inst Phys & Astrophys, Werner Heisenberg Inst, D-80805 Munich, Germany

[6] Univ Munich, Arnold Sommerfeld Ctr, D-80333 Munich, Germany

[7] Univ Fed Rio Grande do Norte, Dept Fis, BR-59072970 Natal, RN, Brazil

[8] Max Planck Inst Astrophys, D-85748 Garching, Germany

来源：

PHYSICAL REVIEW LETTERS | 2013年 / 111卷 / 23期

关键词：

STRONG CP PROBLEM; STELLAR EVOLUTION CODE; SOLAR AXIONS; WHITE-DWARF; RED GIANT; ELECTROMAGNETIC PROPERTIES; COHERENT CONVERSION; PARTICLE-PHYSICS; DIPOLE-MOMENTS; MAGNETIC-FIELD;

D O I：

10.1103/PhysRevLett.111.231301

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The red-giant branch (RGB) in globular clusters is extended to larger brightness if the degenerate helium core loses too much energy in "dark channels.'' Based on a large set of archival observations, we provide high-precision photometry for the Galactic globular cluster M5 (NGC 5904), allowing for a detailed comparison between the observed tip of the RGB with predictions based on contemporary stellar evolution theory. In particular, we derive 95% confidence limits of g(ae) < 4: 3 x 10(-13) on the axionelectron coupling and mu(p) < 4: 5 x 10(-12) mu(B) (Bohr magneton mu(B) = e/2m(e)) on a neutrino dipole moment, based on a detailed analysis of statistical and systematic uncertainties. The cluster distance is the single largest source of uncertainty and can be improved in the future.

引用

页数：5

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