Study of the effect of neutrino oscillations on the supernova neutrino signal in the LVD detector

被引:36
作者
Agafonova, N. Yu.
Aglietta, M.
Antonioli, P.
Bari, G.
Boyarkin, V. V.
Bruno, G.
Fulgione, W.
Galeotti, P.
Garbini, M.
Ghia, P. L.
Giusti, P.
Kemp, E.
Kuznetsov, V. V.
Kuznetsov, V. A.
Malguin, A. S.
Menghetti, H.
Pesci, A.
Pless, I. A.
Porta, A.
Ryasny, V. G.
Ryazhskaya, O. G.
Saavedra, O.
Sartorelli, G.
Selvi, M.
Vigorito, C.
Vissani, F.
Votano, L.
Yakushev, V. F.
Zatsepin, G. T.
Zichichi, A.
机构
[1] Univ Bologna, I-40126 Bologna, Italy
[2] Ist Nazl Fis Nucl, Sez Bologna, I-40126 Bologna, Italy
[3] Russian Acad Sci, Inst Nucl Res, Moscow 109017, Russia
[4] Univ Turin, INAF, Inst Phys Interplanetary Space, I-10124 Turin, Italy
[5] Ist Nazl Fis Nucl, I-10125 Turin, Italy
[6] Ctr Studi Ric E Fermi, Museo Stor Fis, Rome, Italy
[7] Ist Nazl Fis Nucl, LNGS, Assergi, Italy
[8] Univ Estadual Campinas, BR-13081970 Campinas, SP, Brazil
[9] MIT, Cambridge, MA 02139 USA
[10] Ist Nazl Fis Nucl, LNF, Frascati, Italy
关键词
LVD; neutrino detection; supernova core collapse; neutrino oscillation; MSW effect;
D O I
10.1016/j.astropartphys.2006.11.004
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
The LVD detector, located in the INFN Gran Sasso National Laboratory (Italy), studies supernova neutrinos through the interactions with protons and carbon nuclei in the liquid scintillator and interactions with the iron nuclei of the support structure. We investigate the effect of neutrino oscillations in the signal expected in the LVD detector. The MSW effect has been studied in detail for neutrinos travelling through the collapsing star and the Earth. We show that the expected number of events and their energy spectrum are sensitive to the oscillation parameters, in particular to the mass hierarchy and the value of theta(13), presently unknown. Finally we discuss the astrophysical uncertainties, showing their importance and comparing it with the effect of neutrino oscillations on the expected signal. We do not discuss in this paper the determination of oscillation parameters from the results of the observations; this task seems to be very difficult until astrophysical uncertainties are significantly reduced. (c) 2007 Elsevier B.V. All rights reserved.
引用
收藏
页码:254 / 270
页数:17
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