SEARCH FOR LONG-LIVED NEUTRAL BOSONS IN ORTHOPOSITRONIUM DECAY

被引：34

作者：

ASAI, S

ORITO, S

YOSHIMURA, K

HAGA, T

机构：

[1] Department of Physics, Faculty of Science, University of Tokyo

来源：

PHYSICAL REVIEW LETTERS | 1991年 / 66卷 / 19期

关键词：

D O I：

10.1103/PhysRevLett.66.2440

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have searched for orthopositronium decay into gamma plus a feebly interacting boson X0, by looking for a narrow peak in the energy spectrum of a single gamma taken under the condition of no additional gamma detected in a hermetic photon detector. No evidence of such decay is observed, resulting in a new upper limit on the branching ratio of 1.1 x 10(-6), which is a factor of 60 more stringent than previous limits in the m(x) region below 30 keV. This experiment rules out the existence of light (m(x) < 800 keV) Goldstone-like bosons having electron-coupling constants alpha(Xee) larger than 1.1 x 10(-11).

引用

收藏

页码：2440 / 2443

页数：4

相关论文

共 13 条

[1] RADIATIVE-CORRECTIONS TO POSITRONIUM DECAY [J].

ADKINS, GS .

ANNALS OF PHYSICS, 1983, 146 (01) :78-128

[2] NEW LIMITS ON THE SINGLE-GAMMA-DECAY OF ORTHOPOSITRONIUM [J].

AMALDI, U ;

CARBONI, G ;

JONSON, B ;

THUN, J .

PHYSICS LETTERS B, 1985, 153 (06) :444-448

[3]

BAILEY J, 1983, NUCL PHYS A, V409, pC331

[4] SEARCH FOR NEUTRAL METASTABLE PENETRATING PARTICLES PRODUCED IN THE SLAC BEAM DUMP [J].

BJORKEN, JD ;

ECKLUND, S ;

NELSON, WR ;

ABASHIAN, A ;

CHURCH, C ;

LU, B ;

MO, LW ;

NUNAMAKER, TA ;

RASSMANN, P .

PHYSICAL REVIEW D, 1988, 38 (11) :3375-3386

[5] LIMIT ON EXOTIC 2-BODY DECAYS OF ORTHOPOSITRONIUM [J].

CARBONI, G ;

DAHME, W .

PHYSICS LETTERS B, 1983, 123 (05) :349-352

[6] O(ALPHA-2IN(ALPHA-1)) CORRECTIONS IN POSITRONIUM - HYPERFINE SPLITTING AND DECAY-RATE [J].

CASWELL, WE ;

LEPAGE, GP .

PHYSICAL REVIEW A, 1979, 20 (01) :36-43

[7] EFFECT OF THE ENERGY-LOSS PROCESS ON THE ANNIHILATION OF ORTHOPOSITRONIUM IN SILICA AEROGEL [J].

CHANG, TB ;

XU, M ;

ZENG, XT .

PHYSICS LETTERS A, 1987, 126 (03) :189-194

[8] ARE THERE NEW DECAY MODES OF ORTHOPOSITRONIUM [J].

DOBROLIUBOV, MI ;

IGNATIEV, AY .

PHYSICS LETTERS B, 1989, 229 (04) :418-420

[9] SEARCH FOR THE ELECTRON-POSITRON DECAY OF AN AXION-LIKE PARTICLE FROM A 590 MEV PROTON-BEAM DUMP [J].

FAISSNER, H ;

HEINRIGS, W ;

PREUSSGER, A ;

REITZ, J ;

SAMM, D ;

TUCHSCHERER, H ;

KOSTKA, P ;

LANIUS, K ;

NOWAK, S ;

SPIERING, C ;

WALTER, M ;

BADERTSCHER, A ;

DAUM, M ;

DIETLICHER, R ;

ZEHNDER, A .

ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS, 1989, 44 (04) :557-566

[10]

METAG V, 1983, NUCL PHYS A, V409, P331