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The Solar $Hep$ Process | | Kuniharu Kubodera
; Tae-Sun Park
; | | Date: |
3 Feb 2004 | | Journal: | Ann.Rev.Nucl.Part.Sci. 54 (2004) 19-37 | | Subject: | nucl-th hep-ph | | Abstract: | The $Hep$ process is a weak-interaction reaction, $He3 + p o He4 + e^+ +
u_e$, which occurs in the sun. There is renewed interest in $Hep$ owing to current experimental efforts to extract from the observed solar neutrino spectrum information on non-standard physics in the neutrino sector. $Hep$ produces highest-energy solar neutrinos, although their flux is quite modest. This implies that the $Hep$ neutrios can at some level influence the solar neutrino spectrum near its upper end. Therefore, a precise interpretation of the observed solar neutrino spectrum requires an accurate estimate of the $Hep$ rate. This is an interesting but challenging task. We describe the difficulties involved and how the recent theoretical developments in nuclear physics have enabled us to largely overcome these difficulties. A historical survey of $Hep$ calculations is followed by an overview of the latest developments. We compare the results obtained in the conventional nuclear physics approach and those obtained in a newly developed effective field theory approach. We also discuss the current status of the experiments relevant to $Hep$. | | Source: | arXiv, nucl-th/0402008 | | Services: | Forum | Review | PDF | Favorites | |
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