ESTIMATION OF THE BRANCHING RATIO OF THE DECAY K-L(O)-]E+E-E+E- FROM THE K-L(O)-]E+E-X PROCESS

被引：10

作者：

AKAGI, T

FUKUHISA, R

HEMMI, Y

INAGAKI, T

ISHIKAWA, K

KISHIDA, T

KOBAYASHI, M

KOMATSUBARA, TK

KUZE, M

SAI, F

SATO, T

SHINKAWA, T

SUEKANE, F

TAKAMATSU, K

TOYOURA, J

YAMAMOTO, SS

YOSHIMURA, Y

机构：

[1] UNIV TOKYO, DEPT PHYS, TOKYO 113, JAPAN

[2] KYOTO UNIV, DEPT PHYS, KYOTO 606, JAPAN

[3] KEK, NATL LAB HIGH ENERGY PHYS, TSUKUBA 305, JAPAN

来源：

PHYSICAL REVIEW D | 1993年 / 47卷 / 07期

关键词：

D O I：

10.1103/PhysRevD.47.R2644

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

In an experiment to search for the decay K(L)0 --> ee using the 12-GeV Proton Synchrotron at KEK, we observed 18 events with the e+e- effective mass greater than 470 MeV/c2. They are presumed to come mainly from the decay K(L)0 --> e+e-e+e-. Subtracting the background from the decay K(L)0 --> eegamma and the external conversion of gamma in the decays K(L)0 --> gammagamma and K(L)0 --> eegamma, the branching ratio of the decay K(L)0 --> e+e-e+e- is estimated to be (6 +/- 2 +/- 1) X 10(-8). It is consistent with the previous experimental values.

引用

页码：R2644 / R2647

页数：4

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