ISSN:0094-243X    

DOI:10.1063/1.2947412

出版商:AIP    

年代:1974

数据来源: AIP

ISSN:0094-243X    

DOI:10.1063/1.2947414

出版商:AIP    

年代:1974

数据来源: AIP

摘要:

The current status of the experimental efforts by Davis to detect neutrinos from the sun is reviewed from the point of view of the theory of solar models. The essential physical input for a standard model of the sun is presented. Ten different hypothetical explanations of the discrepancy between the theoretically expected37Ar production rate and the observed production rate are discussed. None of these hypotheses are entirely satisfactory. One, the low Z model, is marginally attractive but it requires the sun to have a very unusual chemical composition. The errors in the fluxes from the standard model and the low Z model resulting from errors in the input data lead to37Ar production rates of5.6 ± 1.8and1.4 ± 0.35 × 10−36 atoms/target atom/sec, respectively.

ISSN:0094-243X    

DOI:10.1063/1.2947415

出版商:AIP    

年代:1974

数据来源: AIP

摘要:

The scope of the present paper is three‐fold: to review the status of the detection of cosmic ray muon neutrinos of atmospheric origin, to make an estimate of the cosmic ray background in the Brookhaven Solar Neutrino Experiment and to briefly examine the possibility of detecting neutrinos from supernovae and collapsing stars in the Galaxy.

ISSN:0094-243X    

DOI:10.1063/1.2947416

出版商:AIP    

年代:1974

数据来源: AIP

摘要:

Cosmological data is reviewed suggesting that the universe may be open and dominated by neutrinos and gravitons rather than by baryons. The thermal history of the Lepton Era is investigated incorporating the effects of neutral currents, additional neutrinos, and a small neutrino mass. In the canonical version of Big Bang cosmology (equal numbers of neutrinos and antineutrinos), the neutrino number and energy density is, like that of photons, gravitationally insignificant unless the neutrino has a small mass (∼10 ev).The neutrino sea can be cosmologically significant if it is degenerate (so that the net leptonic or muonic charge is non‐zero) with∼ 7 × 105neutrinos (or anti‐neutrinos) per cc. This density homogeneously spread out is still so low that even the most energetic cosmic ray protons will not be stopped, even if neutral currents exist with the usual weak strength. If these degenerate neutrinos have a small mass ∼0.5 ev, they will condense into degenerate neutrino superstars of the size and mass of galactic clusters.If neutral currents make the (e&ngr;)(e&ngr;) coupling 5 × greater than what it is in V‐A theory, nucleosynthesis commences a little earlier than conventionally assumed. This increases the cosmological He4abundance predicted only slightly fromY = 0.27toY = 0.29.An appendix reviews the effect of neutral currents on neutrino processes in stars.

ISSN:0094-243X    

DOI:10.1063/1.2947417

出版商:AIP    

年代:1974

数据来源: AIP

ISSN:0094-243X    

DOI:10.1063/1.2947418

出版商:AIP    

年代:1974

数据来源: AIP