High precision measurement of the tritium β spectrum near its endpoint and upper limit on the neutrino mass

被引：217

作者：

Weinheimer, C ^{[1
]}

Degenddag, B ^{[1
]}

Bleile, A ^{[1
]}

Bonn, J ^{[1
]}

Bornschein, L ^{[1
]}

Kazachenko, O ^{[1
]}

Kovalik, A ^{[1
]}

Otten, EW ^{[1
]}

机构：

[1] Univ Mainz, Inst Phys, D-55099 Mainz, Germany

来源：

PHYSICS LETTERS B | 1999年 / 460卷 / 1-2期

关键词：

neutrino mass; tritium beta spectrum;

D O I：

10.1016/S0370-2693(99)00780-7

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The Mainz neutrino mass experiment investigates the endpoint region of the tritium beta decay spectrum to determine the mass of the electron antineutrino. By the recent upgrade the former problem of dewetting T-2 films has been solved and the signal-to-background-ratio was improved by a factor of 10. The latest measurement leads to m(nu)(2) = -3.7 +/- 5.3(stat) +/- 2.1(sys) eV(2)/c(4), from which an upper limit of m(nu) < 2.8 eV/c(2) (95% C.L.) is derived. Some indication for the anomaly, reported by the Troitsk group, was found, but its postulated half year period is contradicted by our data. (C) 1999 Published by Elsevier Science B.V. All rights reserved.

引用

页码：219 / 226

页数：8

共 17 条

[1]

BACKE Herbert, 1941, COMPLEMENT C FAITE M

[2] Status and perspectives of the Mainz neutrino mass experiment [J].

Barth, H ;

Bornschein, L ;

Degen, B ;

Fleischmann, L ;

Przyrembel, M ;

Backe, H ;

Bleile, A ;

Bonn, J ;

Goldmann, D ;

Gundlach, M ;

Kettig, O ;

Otten, EW ;

Tietze, G ;

Weinheimer, C ;

Leiderer, P ;

Kazachenko, O ;

Kovalik, A .

PROGRESS IN PARTICLE AND NUCLEAR PHYSICS, VOL 40: NEUTRINOS IN ASTRO, PARTICLE AND NUCLEAR PHYSICS, 1998, 40 :353-376

[3] RESULTS OF THE TROITSK EXPERIMENT ON THE SEARCH FOR THE ELECTRON ANTINEUTRINO REST MASS IN TRITIUM BETA-DECAY [J].

BELESEV, AI ;

BLEULE, AI ;

GERASKIN, EV ;

GOLUBEV, AA ;

GOLUBEV, NA ;

KAZACHENKO, OV ;

KIEV, EP ;

KUZNETSOV, YE ;

LOBASHEV, VM ;

OVCHINNIKOV, BM ;

PARFENOV, VI ;

SEKACHEV, IV ;

SOLODUKHIN, AP ;

TITOV, NA ;

YARYKIN, IE ;

ZAKHAROV, YI ;

BALASHOV, SN ;

SPIVAK, PE .

PHYSICS LETTERS B, 1995, 350 (02) :263-272

[4] A high resolution electrostatic time-of-flight spectrometer with adiabatic magnetic collimation [J].

Bonn, J ;

Bornschein, L ;

Degen, B ;

Otten, EW ;

Weinheimer, C .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 1999, 421 (1-2) :256-265

[5]

FLEISCHMANN L, 1997, THESIS MAINZ U

[6] Evidence for oscillation of atmospheric neutrinos [J].

Fukuda, Y ;

Hayakawa, T ;

Ichihara, E ;

Inoue, K ;

Ishihara, K ;

Ishino, H ;

Itow, Y ;

Kajita, T ;

Kameda, J ;

Kasuga, S ;

Kobayashi, K ;

Kobayashi, Y ;

Koshio, Y ;

Miura, M ;

Nakahata, M ;

Nakayama, S ;

Okada, A ;

Okumura, K ;

Sakurai, N ;

Shiozawa, M ;

Suzuki, Y ;

Takeuchi, Y ;

Totsuka, Y ;

Yamada, S ;

Earl, M ;

Habig, A ;

Kearns, E ;

Messier, MD ;

Scholberg, K ;

Stone, JL ;

Sulak, LR ;

Walter, CW ;

Goldhaber, M ;

Barszczxak, T ;

Casper, D ;

Gajewski, W ;

Halverson, PG ;

Hsu, J ;

Kropp, WR ;

Price, LR ;

Reines, F ;

Smy, M ;

Sobel, HW ;

Vagins, MR ;

Ganezer, KS ;

Keig, WE ;

Ellsworth, RW ;

Tasaka, S ;

Flanagan, JW ;

Kibayashi, A .

PHYSICAL REVIEW LETTERS, 1998, 81 (08) :1562-1567

[7]

Garwiser E., 1998, SCIENCE, V280, P1405

[8]

Gavrin V. N., 1998, P 18 C NEUTR PHYS AS

[9] Effects from changes in the final state spectrum on the neutrino mass determination from T-2 beta decay experiments [J].

Jonsell, S ;

Monkhorst, HJ .

PHYSICAL REVIEW LETTERS, 1996, 76 (24) :4476-4479

[10] MOLECULAR EFFECTS IN TRITIUM BETA-DECAY .4. EFFECT OF CRYSTAL EXCITATIONS ON NEUTRINO MASS DETERMINATION [J].

KOLOS, W ;

JEZIORSKI, B ;

RYCHLEWSKI, J ;

SZALEWICZ, K ;

MONKHORST, HJ ;

FACKLER, O .

PHYSICAL REVIEW A, 1988, 37 (07) :2297-2303

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