Search for an exotic three-body decay of orthopositronium o-Ps→γ+X1+X2

被引：3
|
作者：
Crivelli, P [1 ]
机构：
[1] Swiss Fed Inst Technol, Zurich, Switzerland
来源：
CANADIAN JOURNAL OF PHYSICS | 2002年 / 80卷 / 11期
关键词：
D O I：
10.1139/P02-096
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We carried out a model independent search for an exotic three-body decay of orthopositronium o-Ps --> gamma + X-1 + X-2 into a photon and two weak interacting particles X-1 and X-2. The existence of this decay could explain the discrepancy between the measured and the predicted values of the orthopositronium-decay rate in vacuum. Our result excludes this decay mode as the origin of the discrepancy and an upper limit on the branching ratio has been set B(o-Ps --> gamma + X-1 + X-2) < 4.4 x 10(-5) (at the 90% confidence level), for the photon energy in the range from 40 < E-gamma < 400 keV and for the weak interacting particles X mass range 0 <= m(X1) + m(X2) <= 900 keV.
引用
收藏
页码：1281 / 1285
页数：5
相关论文
共 50 条
  • [21] Atomic Modulation Functions, Periodic Nodal Surfaces and the three-dimensional incommensurately modulated (1-x)Bi2O3•xNb2O5, 0.06 &lt; x &lt; 0.23, solid solution
    Withers, RL
    Ling, CD
    Schmid, S
    ZEITSCHRIFT FUR KRISTALLOGRAPHIE, 1999, 214 (05): : 296 - 304
  • [22] The Role of Weak C-H•••X (X = O, π) Interactions in Three 1-Hydroxy-2-naphthoic Acid Cocrystals with N-Containing Heteroaromatics: Structural Characterization and Synthon Cooperation
    Qu, Huiqi
    Chen, Ruixin
    Ma, Yiru
    Li, Na
    Zhang, Mingjuan
    Yu, Yueqin
    Lv, Zhiguo
    Liu, Kang
    CRYSTALS, 2023, 13 (03)
  • [23] High-transmittance attenuated phase-shift masks using three-stack (Ta2O5)x/(Al2O3)1-x, coatings for the 90 nm-technology node
    Lai, FD
    MICROELECTRONIC ENGINEERING, 2004, 73-4 : 63 - 68
  • [24] Simulating the HeI photoelectron spectrum of Cl2O with new full-dimensional adiabatic potential energy surfaces of Cl2O(X1A1), Cl2O+(X2B1), and Cl2O+(C2A2) and a three-state diabatic potential energy matrix of Cl2O+(A2B2, B2A1, and 22A1): a quantum mechanical study
    Hou, Zhe
    Hou, Siting
    Xie, Changjian
    Han, Huixian
    PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 2023, 25 (28) : 18775 - 18787
  • [25] Three-body decay of the 3s 2A prime 1(N = 1, K = 0) and 3d 2E double prime (N = 1, G = 0, R = 1) Rydberg states of the triatomic hydrogen molecule H3
    Muller, U.
    Cosby, P.C.
    Physical Review A. Atomic, Molecular, and Optical Physics, 1999, 59 (05):
  • [26] Cation disorder in three-layer Aurivillius phases:: Structural studies of Bi2-xSr2+xTi1-xNb2+xO12 (0 &lt; x &lt; 0.8) and Bi4-xLaxTi3O12 (x = 1 and 2)
    Hervoches, CH
    Lightfoot, P
    JOURNAL OF SOLID STATE CHEMISTRY, 2000, 153 (01) : 66 - 73
  • [27] Double-Differential Angle-Dependent Three-Body Neutron Production Cross Sections of the Reaction 2H(t, n) X plus Y at Triton Energies Between 5.97 and 16.41 MeV
    Drosg, M.
    Haouat, G.
    Drake, D. M.
    NUCLEAR SCIENCE AND ENGINEERING, 2016, 183 (02) : 298 - 303
  • [28] Nonadiabatic dynamics of O(1D) + N2(X1Σg+) → O(3P) + N2(X1Σg+) on three coupled potential surfaces: Symmetry, Coriolis, spin-orbit, and Renner-Teller effects
    Defazio, Paolo
    Gamallo, Pablo
    Petrongolo, Carlo
    JOURNAL OF CHEMICAL PHYSICS, 2012, 136 (05):
  • [29] Symmetry-resolved x-ray absorption fine structure and resonant Auger-spectator-electron decay study of O 1s→Rydberg resonances in O2
    Tanaka, T.
    Feifel, R.
    Kitajima, M.
    Tanaka, H.
    Sorensen, S. L.
    Sankari, R.
    De Fanis, A.
    Piancastelli, M. -N.
    Karlsson, L.
    Ueda, K.
    PHYSICAL REVIEW A, 2008, 78 (02):
  • [30] Probing the valence character of O-1s→Rydberg excited O2 by participator Auger decay measurements and partial ion yield spectroscopy following x-ray absorption
    Feifel, R.
    Tanaka, T.
    Kitajima, M.
    Tanaka, H.
    De Fanis, A.
    Sankari, R.
    Karlsson, L.
    Sorensen, S.
    Piancastelli, M.-N.
    Prumper, G.
    Hergenhahn, U.
    Ueda, K.
    JOURNAL OF CHEMICAL PHYSICS, 2007, 126 (17):
12345