Strong Limits on the Possible Decay of the Vacuum Energy into CDM or CMB Photons
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| Formato: | Artículo científico |
| Lenguaje: | en |
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Sociedade Brasileira de Física
2005
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| _version_ | 1866814284748554240 |
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| author | Reuven Opher |
| author_facet | Reuven Opher |
| contents | Strong Limits on the Possible Decay of the Vacuum Energy into CDM or CMB Photons Reuven Opher Ana Pelinson Física, Astronomía y Matemáticas We investigate models that suggest that the vacuum energy could decay into cold dark matter (CDM) or intoa homogeneous distribution of thermalized cosmic microwave background (CMB) photons. We show that theagreement of the density fluctuation spectra obtained from the CMB and galaxy distribution data puts stronglimits on the rate of vacuum energy decay. A vacuum energy decaying into CDM increases the density of theCDM r, diluting the CDM density fluctuations (dr=r)2. The temperature fluctuations of the CMB photons(dT=T)2 are approximately proportional to (dr=r)2, at the recombination epoch. We define F as the predictedincrease of (dr=r)2 (or (dT=T)2) at the recombination epoch. Since the present observed (dr=r)2 derived fromthe CMB and galaxy distribution data agree to » 10%, the maximum value for F is Fmax »= 1:1. Our resultsindicate that the rate of decay of the vacuum energy into CDM or CMB photons is extremely small. 2005 artículo científico 0103-9733 https://www.redalyc.org/articulo.oa?id=46435752 en http://www.redalyc.org/revista.oa?id=464 Brazilian Journal of Physics application/pdf Sociedade Brasileira de Física Brazilian Journal of Physics (Brasil) Num.4B Vol.35 |
| format | Artículo científico |
| id | redalyc_46435752 |
| language | en |
| publishDate | 2005 |
| publisher | Sociedade Brasileira de Física |
| spellingShingle | Strong Limits on the Possible Decay of the Vacuum Energy into CDM or CMB Photons Reuven Opher Física, Astronomía y Matemáticas Strong Limits on the Possible Decay of the Vacuum Energy into CDM or CMB Photons Reuven Opher Ana Pelinson Física, Astronomía y Matemáticas We investigate models that suggest that the vacuum energy could decay into cold dark matter (CDM) or intoa homogeneous distribution of thermalized cosmic microwave background (CMB) photons. We show that theagreement of the density fluctuation spectra obtained from the CMB and galaxy distribution data puts stronglimits on the rate of vacuum energy decay. A vacuum energy decaying into CDM increases the density of theCDM r, diluting the CDM density fluctuations (dr=r)2. The temperature fluctuations of the CMB photons(dT=T)2 are approximately proportional to (dr=r)2, at the recombination epoch. We define F as the predictedincrease of (dr=r)2 (or (dT=T)2) at the recombination epoch. Since the present observed (dr=r)2 derived fromthe CMB and galaxy distribution data agree to » 10%, the maximum value for F is Fmax »= 1:1. Our resultsindicate that the rate of decay of the vacuum energy into CDM or CMB photons is extremely small. 2005 artículo científico 0103-9733 https://www.redalyc.org/articulo.oa?id=46435752 en http://www.redalyc.org/revista.oa?id=464 Brazilian Journal of Physics application/pdf Sociedade Brasileira de Física Brazilian Journal of Physics (Brasil) Num.4B Vol.35 |
| title | Strong Limits on the Possible Decay of the Vacuum Energy into CDM or CMB Photons |
| topic | Física, Astronomía y Matemáticas |
| url | https://www.redalyc.org/articulo.oa?id=46435752 |