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Titolo:
Neutrino-C-12 reactions and the LSND and KARMEN experiments on neutrino oscillations
Autore:
Volpe, C; Auerbach, N; Colo, G; Suzuki, T; Van Giai, N;
Indirizzi:
Inst Nucl Phys, Grp Phys Theor, Orsay, France Inst Nucl Phys Orsay France st Nucl Phys, Grp Phys Theor, Orsay, France
Titolo Testata:
PHYSICS OF ATOMIC NUCLEI
fascicolo: 7, volume: 64, anno: 2001,
pagine: 1165 - 1168
SICI:
1063-7788(200107)64:7<1165:NRATLA>2.0.ZU;2-H
Fonte:
ISI
Lingua:
ENG
Soggetto:
(NU)OVER-BAR(MU)->(NU)OVER-BAR(E) OSCILLATIONS; SCATTERING; C-12; C-12(NU(MU),MU(-))X; CARBON;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
28
Recensione:
Indirizzi per estratti:
Indirizzo: Volpe, C Inst Nucl Phys, Grp Phys Theor, Orsay, France Inst Nucl Phys Orsay France hys, Grp Phys Theor, Orsay, France
Citazione:
C. Volpe et al., "Neutrino-C-12 reactions and the LSND and KARMEN experiments on neutrino oscillations", PHYS ATOM N, 64(7), 2001, pp. 1165-1168

Abstract

We present new theoretical results of the flux-averaged C-12(nu (e), e(-))N-12 and C-12(nu (mu), mu (-))N-12 cross sections with nu (mu)(nu (e)) coming from the decay-in-flight (decay-at-rest) of pi (+)(mu (+)). These cross sections are relevant for the interpretation of the recent experiments on neutrino oscillation performed by the LSND and KARMEN collaborations. The microscopic approaches used are charge-exchange random phase approximation (RPA), charge-exchange RPA among quasiparticles (QRPA), and the Shell Model. We show that the exclusive cross sections are in nice agreement with the experimental values for both reactions when a large-scale shell-model calculation is performed. Concerning the inclusive cross section for nu (mu) coming from the decay-in-flight of pi (+), the calculated value keeps overestimating the experimental one by 20-30%, while the inclusive cross section due to nu (e) coming from the decay-at-rest of mu (+) is in agreement within experimental error bars with the measured values. The shell-model prediction for the decay-in-flight neutrino cross section is reduced compared to the RPA one because of the different kind of correlations in the calculation of the spin modes (in particular, the quenching of the 1(+)) and partially dueto the shell-model configuration basis, which is not large enough, as we show using arguments based on sum rules. (C) 2001 MAIK "Nauka/Interperiodica".

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Documento generato il 24/01/20 alle ore 12:21:53