SEARCH FOR A NEUTRAL PARTICLE OF MASS 33.9 MEV IN PION DECAY

被引：24

作者：

DAUM, M

FROSCH, R

HAJDAS, W

JANOUSCH, M

KETTLE, PR

RITT, S

ZHAO, ZG

机构：

[1] ETH ZURICH,INST TEILCHENPHYS,IPP,CH-5232 VILLIGEN,SWITZERLAND

[2] UNIV VIRGINIA,DEPT PHYS,CHARLOTTESVILLE,VA 22901

来源：

PHYSICS LETTERS B | 1995年 / 361卷 / 1-4期

关键词：

D O I：

10.1016/0370-2693(95)01165-M

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We have measured the muon momentum distribution in charged pion decay in flight in order to search for a small branching fraction eta of pion decays pi(+) --> mu(+) + X, in which a heavy neutral particle X with a mass of 33.9 MeV would be emitted. The upper limit of eta at a confidence level of 95% is found to be 2.6 x 10(-8).

引用

页码：179 / 183

页数：5

共 9 条

[1] SEARCH FOR AN ADMIXTURE OF HEAVY NEUTRINO STATES IN PION DECAY [J].

ABELA, R ;

DAUM, M ;

EATON, GH ;

FROSCH, R ;

JOST, B ;

KETTLE, PR ;

STEINER, E .

PHYSICS LETTERS B, 1981, 105 (04) :263-266

[2] ANOMALY IN THE TIME DISTRIBUTION OF NEUTRINOS FROM A PULSED-BEAM STOP SOURCE [J].

ARMBRUSTER, B ;

BLAIR, I ;

BODMANN, BA ;

BOOTH, NE ;

DREXLIN, G ;

EBERHARD, V ;

EDGINGTON, JA ;

EITEL, K ;

FINCKH, E ;

GEMMEKE, H ;

HOSSL, J ;

JANNAKOS, T ;

KLEIFGES, M ;

KLEINFELLER, J ;

KRETSCHMER, W ;

MASCHUW, R ;

PLISCHKE, P ;

RAPP, J ;

SELIGMANN, B ;

STUMM, O ;

WOLF, J ;

ZEITNITZ, B .

PHYSICS LETTERS B, 1995, 348 (1-2) :19-28

[3] REMARKS ON THE KARMEN ANOMALY [J].

BARGER, V ;

PHILLIPS, RJN ;

SARKAR, S .

PHYSICS LETTERS B, 1995, 352 (3-4) :365-371

[4]

BARGER V, 1995, IN PRESS

[5]

BILGER R, 1995, IN PRESS

[6]

BROWN KL, 1974, CERN742 REP

[7] SEARCH FOR ADMIXTURES OF MASSIVE NEUTRINOS IN THE DECAY PI+-]MU++UPSILON [J].

DAUM, M ;

KETTLE, PR ;

JOST, B ;

MARSHALL, RM ;

MINEHART, RC ;

STEPHENS, WA ;

ZIOCK, KOH .

PHYSICAL REVIEW D, 1987, 36 (09) :2624-2632

[8]

DAUM M, IN PRESS

[9]

1994, PHYS REV D, V50, P1280

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