Constraining spacetime variations of nuclear decay rates from light curves of type Ia supernovae - INSPIRE

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Constraining spacetime variations of nuclear decay rates from light curves of type Ia supernovae

Ivan Karpikov
(
- Moscow, INR
)
,
Maxim Piskunov
(
- Moscow, INR
)
,
Sergey Troitsky
(
- Moscow, INR
)
,
Anton Sokolov
(
- Moscow State U. and
- Moscow, ITEP
)

Jan 20, 2015

5 pages

Published in:

Phys.Rev.D 91 (2015) 12, 127301

Published: Jun 3, 2015

e-Print:

1501.04909 [hep-ph]

DOI:

10.1103/PhysRevD.91.127301

Report number:

INR-TH-2015-005

View in:

ADS Abstract Service

reference search3 citations

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Abstract: (APS)

The luminosity of fading type Ia supernovae is governed by radioactive decays of Ni56 and Co56. The decay rates are proportional to the Fermi coupling constant GF and, therefore, are determined by the vacuum expectation value v of the Brout-Englert-Higgs field. We use publicly available sets of light curves of type Ia supernova at various redshifts to constrain possible spacetime variations of the Ni56 decay rate. The resulting constraint is not very tight; however, it is the only direct bound on the variation of the decay rate for redshifts up to z∼1. We discuss potential applications of the result to searches for nonconstancy of GF and v.

Note:

11 pages, 2 figures. V2: larger data set used, constraints improved significantly; text revised considerably

06.20.Jr
95.30.Cq
97.60.Bw
nucleus: decay rate
supernova
space-time
redshift
coupling constant
radioactivity
vacuum state

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Figures(2)

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