EXPERIMENTAL LIMITS ON EXTRA-Z BOSONS FROM E+E- ANNIHILATION DATA WITH THE VENUS DETECTOR AT SQUARE-ROOT-S=50-64 GEV

被引:14
作者
ABE, K
AMAKO, K
ARAI, Y
ASANO, Y
CHIBA, M
CHIBA, Y
DAIGO, M
EMURA, T
ENDO, I
FUKAWA, M
FUKUI, T
FUKUSHIMA, Y
HABA, J
HAYASHIBARA, I
HEMMI, Y
HIGUCHI, M
HIROSE, T
HOJYO, Y
HOMMA, Y
HOSHI, Y
IKEGAMI, Y
ISHIHARA, N
KAMITANI, T
KANEMATSU, N
KANZAKI, J
KIKUCHI, R
KONDO, T
KOSEKI, T
KUBO, K
KURASHIGE, H
MATSUI, T
MINAMI, M
MIYAKE, K
MORI, S
NAGASHIMA, Y
NAKAMURA, T
NAKANO, I
NARITA, Y
ODAKA, S
OGAWA, K
OHAMA, T
OHSUGI, T
OKAMOTO, A
ONO, A
OSABE, H
OYAMA, T
SAITO, H
SAKAE, H
SAKAMOTO, H
SAKAMOTO, S
机构
[1] NATL LAB HIGH ENERGY PHYS, KEK, TSUKUBA, IBARAKI 305, JAPAN
[2] UNIV TSUKUBA, INST APPL PHYS, TSUKUBA 305, JAPAN
[3] TOKYO METROPOLITAN UNIV, DEPT PHYS, TOKYO 158, JAPAN
[4] HIROSHIMA UNIV, DEPT PHYS, HIROSHIMA 730, JAPAN
[5] WAKAYAMA MED COLL, WAKAYAMA 64963, JAPAN
[6] TOKYO UNIV AGR & TECHNOL, FAC ENGN, KOGANEI, TOKYO 184, JAPAN
[7] OSAKA UNIV, DEPT PHYS, TOYONAKA, OSAKA 560, JAPAN
[8] KYOTO UNIV, DEPT PHYS, KYOTO 606, JAPAN
[9] TOHOKU GAKUIN UNIV, DEPT APPL PHYS, TAGAJO 985, JAPAN
[10] KOBE UNIV, GRAD SCH SCI & TECHNOL, KOBE 657, JAPAN
[11] KOBE UNIV, SCH ALLIED MED SCI, KOBE 65401, JAPAN
[12] UNIV TSUKUBA, INST PHYS, TSUKUBA 305, JAPAN
[13] MIYAZAKI UNIV, FAC ENGN, MIYAZAKI 88921, JAPAN
[14] KOBE UNIV, COLL LIBERAL ARTS, KOBE 657, JAPAN
[15] IBARAKI COLL TECHNOL, DEPT ELECTR & COMP ENGN, KATSUTA 312, JAPAN
[16] OKAYAMA UNIV, DEPT PHYS, OKAYAMA 700, JAPAN
[17] TSUKUBA INST SCI & TECHNOL, TSUCHIURA 300, JAPAN
[18] FUKUI UNIV, FAC ENGN, FUKUI 910, JAPAN
关键词
D O I
10.1016/0370-2693(90)91348-F
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We have tested extra Z models in the reactions e+e-→μ+μ-, τ+τ- and hadrons in the energy range 50< s<64 GeV using the VENUS detector at the TRISTAN e+e- storage ring. Our data are in good agreement with the standard model prediction ( χ2 NDf= 2.9 31)). We have obtained 90% confidence-level lower limits of 105, 125 and 231 GeV for the masses of ZΨ, Zη and Zχ bosons which are expected from the E6 grand unified theory. We also place a 90% confidence-level lower limit of 426 GeV for the mass of an extra-Z boson whose couplings to quarks and leptons are assumed to be the same as those for the standard Z boson. Our results exceed the previous experimental limits from the pp collider experiments, although there have been some combined analyses reporting the limits better than those obtained in the present analysis. © 1990.
引用
收藏
页码:297 / 305
页数:9
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