Search for heavy neutrinos mixing with tau neutrinos

被引：122

作者：

Astier, P ^{[1
]}

Autiero, D

Baldisseri, A

Baldo-Ceolin, M

Banner, M

Bassompierre, G

Benslama, K

Besson, N

Bird, I

Blumenfeld, B

Bobisut, F

Bouchez, J

Boyd, S

Bueno, A

Bunyatov, S

Camilleri, L

Cardini, A

Cattaneo, PW

Cavasinni, V

Cervera-Villanueva, A

Collazuol, G

Conforto, G

Conta, C

Contalbrigo, M

Cousins, R

Daniels, D

Degaudenzi, H

Del Prete, T

De Santo, A

Dignan, T

Di Lella, L

Silva, EDE

Donnelly, IJ

Dumarchez, J

Ellis, M

Fazio, T

Feldman, GJ

Ferari, R

Ferrère, D

Flaminio, V

Fraternali, M

Gaillard, JM

Gangler, E

Geiser, A

Geppert, D

Gibin, D

Gninenko, SN

Godley, A

Gonzalez-Garcia, MC

Gomez-Cadenas, JJ

机构：

[1] Univ Paris 06, LPNHE, Paris, France

[2] Univ Paris 07, LPNHE, Paris, France

[3] Univ Dortmund, D-44221 Dortmund, Germany

[4] Joint Inst Nucl Res Dubna, Dubna, Russia

[5] Univ Florence, I-50121 Florence, Italy

[6] Ist Nazl Fis Nucl, I-50125 Florence, Italy

[7] CERN, Geneva, Switzerland

[8] Univ Lausanne, CH-1015 Lausanne, Switzerland

[9] Univ Calif Los Angeles, Los Angeles, CA USA

[10] Univ Melbourne, Melbourne, Vic, Australia

[11] Nucl Res Inst, INR, Moscow, Russia

[12] Univ Padua, I-35100 Padua, Italy

[13] Ist Nazl Fis Nucl, Padua, Italy

[14] Univ Pavia, I-27100 Pavia, Italy

[15] Ist Nazl Fis Nucl, I-27100 Pavia, Italy

[16] Univ Perugia, I-06100 Perugia, Italy

[17] Ist Nazl Fis Nucl, I-06100 Perugia, Italy

[18] Univ Pisa, I-56100 Pisa, Italy

[19] Ist Nazl Fis Nucl, Pisa, Italy

[20] Roma Tre Univ, Rome, Italy

[21] Ist Nazl Fis Nucl, Rome, Italy

[22] CEA Saclay, DAPNIA, Gif Sur Yvette, France

[23] Univ S Carolina, Columbia, SC 29208 USA

[24] Univ Sydney, Sydney, NSW 2006, Australia

[25] Univ Urbino, I-61029 Urbino, Italy

[26] Ist Nazl Fis Nucl, I-50125 Florence, Italy

[27] IFIC, Valencia, Spain

[28] Rudjer Boskovic Inst, Zagreb, Croatia

[29] Swiss Fed Inst Technol, Zurich, Switzerland

[30] LAPP, Annecy, France

[31] Johns Hopkins Univ, Baltimore, MD 21218 USA

[32] Harvard Univ, Cambridge, MA 02138 USA

[33] Univ Calabria, I-87036 Cosenza, Italy

[34] Ist Nazl Fis Nucl, Cosenza, Italy

来源：

PHYSICS LETTERS B | 2001年 / 506卷 / 1-2期

基金：

美国国家科学基金会; 俄罗斯基础研究基金会; 澳大利亚研究理事会;

关键词：

neutrino mixing; neutrino decay;

D O I：

10.1016/S0370-2693(01)00362-8

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report on a search for heavy neutrinos (upsilon (4)) produced in the decay D-s --> tau upsilon (4) at the SPS proton target followed by the decay upsilon (4) --> upsilon (tau)e(+)e(-) in the NOMAD detector. Both decays are expected to occur if upsilon (4) is a component of upsilon (tau). From the analysis of the data collected during the 1996-1998 runs with 4.1 x 10(19) protons on target, a single candidate event consistent with background expectations was found. This allows to derive an upper limit on the mixing strength between the heavy neutrino and the tau neutrino in the upsilon (4) mass range from 10 to 190 MeV. Windows between the SN1987a and Big Bang Nucleosynthesis lower limits and our result are still open fur future experimental searches. The results obtained are used to constrain an interpretation of the time anomaly observed in the KARMEN1 detector. (C) 2001 Published by Elsevier Science B.V.

引用

页码：27 / 38

页数：12

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