RevModPhys.84.1307

Monoenergetic lines around 430 and 750 kev while the

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Unformatted text preview: nt (10À42 cm2 ) Stopped = LAMPF 52 Æ 18ðtotÞ Isotope Reaction Channel 2 2 H 12 C Hðe ; eÀ Þpp 12 Cð À 12 e ; e Þ Ng:s: 12 Cð À 12 Ã e; e Þ N Stopped = Stopped = Stopped = Stopped = 12 Cð ; À ÞX  Stopped = Stopped = Stopped = Stopped = Decay in flight À Þ12 N Decay in flight 12 Cð ;  Þ12 CÃ  12 12 Ã Cð; Þ C 12 Cð ;  56 Fe 56 Feð 71 71 Ga 127 I g:s: À 56 e ; e Þ Co Gaðe ; eÀ Þ71 Ge 127 Ið À 127 Xe e; e Þ Stopped = 51 Cr source 51 Cr 37 Ar source Stopped = Theory (10À42 cm2 ) 54 (IA) (Tatara, Kohyama, and Kubodera, 1990) KARMEN 9:1 Æ 0:5ðstatÞ Æ 0:8ðsysÞ 9.4 [Multipole](Donnelly and Peccei, 1979) E225 10:5 Æ 1:0ðstatÞ Æ 1:0ðsysÞ 9.2 [EPT] (Fukugita, Kohyama, and Kubodera, 1988). LSND 8:9 Æ 0:3ðstatÞ Æ 0:9ðsysÞ 8.9 [CRPA] (Kolbe, Langanke, and Vogel, 1999) KARMEN 5:1 Æ 0:6ðstatÞ Æ 0:5ðsysÞ 5.4–5.6 [CRPA] (Kolbe, Langanke, and Vogel, 1999) E225 3:6 Æ 2:0ðtotÞ 4.1 [Shell] (Hayes and Towner, 2000) LSND 4:3 Æ 0:4ðstatÞ Æ 0:6ðsysÞ KARMEN 3:2 Æ 0:5ðstatÞ Æ 0:4ðsysÞ 2.8 [CRPA] (Kolbe, Langanke, and Vogel, 1999) KARMEN 10:5 Æ 1:0ðstatÞ Æ 0:9ðsysÞ 10.5 [CRPA] (Kolbe, Langanke, and Vogel, 1999) LSND 1060 Æ 30ðstatÞ Æ 180ðsysÞ 1750–1780 [CRPA] (Kolbe, Langanke, and Vogel, 1999) 1380 [Shell] (Hayes and Towner, 2000) 1115 [Green’s Function] (Meucci, Giusti, and Pacati, 2004) LSND 56 Æ 8ðstatÞ Æ 10ðsysÞ 68–73 [CRPA] (Kolbe, Langanke, and Vogel, 1999) 56 [Shell] (Hayes and Towner, 2000) KARMEN 256 Æ 108ðstatÞ Æ 43ðsysÞ 264 [Shell] (Kolbe, Langanke, ´ and Martınez-Pinedo, 1999) GALLEX, ave. 0:0054 Æ 0:0009ðtotÞ 0.0058 [Shell] (Haxton, 1998) SAGE 0:0055 Æ 0:0007ðtotÞ SAGE 0:0055 Æ 0:0006ðtotÞ 0.0070 [Shell] (Bahcall, 1997) LSND 284 Æ 91ðstatÞ Æ 25ðsysÞ 210–310 [Quasiparticle] (Engel, Pittel, and Vogel, 1994) equally favorable channel, with the emission of a monoenergetic 15.11 MeV photon. Studies of the above neutrino cross sections have been carried out at the LAMPF facility in the United States (Willis et al., 1980) and the KArlsruhe Rutherford Medium Energy Neutrino Experiment (KARMEN) detector at ISIS at the Rutherford Laboratory in the United Kingdom. The neutrino beam in both experimental facilities is provided from proton beam stops. High-energy proton collisions on a fixed target produce a large þ flux which is subsequently stopped and allowed to decay. The majority of low-energy neutrinos are produced from the decay at rest from stopped þ and þ , providing a well-characterized neutrino beam with energies below 50 MeV.8 The KARMEN experiment at the ISIS facility additionally benefited from a well-defined proton beam structure, which allowed efficient tagging of neutrino events against cosmic ray backgrounds. The main uncertainty affecting these cross section measurements stems primarily from the knowledge of the pion flux produced in the protontarget interactions. Table VII summarizes the mea...
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