Precision Measurement of the 7Be Solar Neutrino Interaction Rate in Borexino

被引：430

作者：

Bellini, G. ^{[1
]}

Benziger, J. ^{[2
]}

Bick, D. ^{[3
]}

Bonetti, S. ^{[1
]}

Bonfini, G.

Avanzini, M. Buizza ^{[1
]}

Caccianiga, B. ^{[1
]}

Cadonati, L. ^{[5
]}

Calaprice, F.

Carraro, C.

Cavalcante, P. ^{[4
]}

Chavarria, A. ^{[6
]}

D'Angelo, D. ^{[1
]}

Davini, S. ^{[7
]}

Derbin, A. ^{[8
]}

Etenko, A. ^{[4
,9
]}

Fomenko, K. ^{[4
,10
]}

Franco, D. ^{[11
]}

Galbiati, C.

Gazzana, S. ^{[4
]}

Ghiano, C. ^{[4
]}

Giammarchi, M. ^{[1
]}

Goeger-Neff, M. ^{[12
]}

Goretti, A. ^{[6
]}

Grandi, L.

Guardincerri, E. ^{[7
]}

Hardy, S. ^{[13
]}

Ianni, Aldo ^{[4
]}

Ianni, Andrea ^{[6
]}

Kobychev, V. ^{[14
]}

Korablev, D. ^{[10
]}

Korga, G.

Koshio, Y. ^{[4
]}

Kryn, D.

Laubenstein, M. ^{[4
]}

Lewke, T. ^{[12
]}

Litvinovich, E.

Loer, B.

Lombardi, F. ^{[4
]}

Lombardi, P.

Ludhova, L. ^{[1
]}

Machulin, I. ^{[9
]}

Manecki, S.

Maneschg, W. ^{[15
]}

Manuzio, G. ^{[7
]}

Meindl, Q.

Meroni, E. ^{[1
]}

Miramonti, L. ^{[1
]}

Misiaszek, M. ^{[4
,16
]}

Montanari, D. ^{[4
]}

机构：

[1] Univ Studi & INFN, Dipartimento Fis, I-20133 Milan, Italy

[2] Princeton Univ, Dept Chem Engn, Princeton, NJ 08544 USA

[3] Inst Expt Phys, D-22761 Hamburg, Germany

[4] INFN Lab Nazl Gran Sasso, I-67010 Assergi, AQ, Italy

[5] Univ Massachusetts, Dept Phys, Amherst, MA 01003 USA

[6] Princeton Univ, Dept Phys, Princeton, NJ 08544 USA

[7] Univ & INFN, Dipartimento Fis, I-16146 Genoa, Italy

[8] St Petersburg Nucl Phys Inst, Gatchina 188350, Russia

[9] NRC Kurchatov Inst, Moscow 123182, Russia

[10] Joint Inst Nucl Res, Dubna 141980, Russia

[11] Lab AstroParticule & Cosmol, F-75205 Paris 13, France

[12] Tech Univ Munich, Dept Phys, D-85747 Garching, Germany

[13] Virginia Polytech Inst & State Univ, Dept Phys, Blacksburg, VA 24061 USA

[14] Kiev Inst Nucl Res, UA-06380 Kiev, Ukraine

[15] Max Planck Inst Kernphys, D-69117 Heidelberg, Germany

[16] Jagiellonian Univ, M Smoluchowski Inst Phys, PL-30059 Krakow, Poland

[17] Univ & INFN, Dipartimento Chim, I-06123 Perugia, Italy

[18] CSIC UVEG, Inst Fis Corpuscular, Valencia 46071, Spain

来源：

PHYSICAL REVIEW LETTERS | 2011年 / 107卷 / 14期

基金：

美国国家科学基金会;

关键词：

DETECTOR; MATTER; MODELS; FLUX;

D O I：

10.1103/PhysRevLett.107.141302

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The rate of neutrino-electron elastic scattering interactions from 862 keV Be-7 solar neutrinos in Borexino is determined to be 46.0 +/- 1.5(stat)(-1.6)(+1.5)(syst)counts/(day . 100 ton). This corresponds to a nu(e)-equivalent Be-7 solar neutrino flux of (3.10 +/- 0.15) x 10(9) cm(-2) s(-1) and, under the assumption of nu(e) transition to other active neutrino flavours, yields an electron neutrino survival probability of 0.51 +/- 0.07 at 862 keV. The no flavor change hypothesis is ruled out at 5.0 sigma. A global solar neutrino analysis with free fluxes determines Phi(pp) = 6.06(-0.66)(+0.02) x 10(10) cm(-2) s(-1) and Phi(CNO) < 1.3 x 10(9) cm(-2) s(-1) (95% C.L.). These results significantly improve the precision with which the Mikheyev-Smirnov-Wolfenstein large mixing angle neutrino oscillation model is experimentally tested at low energy.

引用

页数：5

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