Charged-particle multiplicities of quark and gluon jets in e+e- annihilation at TRISTAN

被引：14

作者：

Nakabayashi, K ^{[1
]}

Yamauchi, M

Abe, K

Adachi, I

Adachi, K

Aoki, M

Emi, K

Enomoto, R

Fujii, H

Fujii, K

Fujii, T

Fujimoto, J

Fujiwara, N

Hayashii, H

Howell, B

Ikeda, H

Inoue, Y

Itoh, R

Itami, S

Iwasaki, H

Iwasaki, M

Kaneyuki, K

Kajikawa, R

Kato, S

Kawabata, S

Kichimi, H

Kobayashi, M

Koltick, D

Levine, I

Miyabayashi, K

Miyamoto, A

Nagai, K

Nakano, E

Nitoh, O

Noguchi, S

Ochi, A

Ochiai, F

Ohishi, N

Ohnishi, Y

Ohshima, Y

Okuno, H

Okusawa, T

Sugiyama, A

Suzuki, S

Takahashi, K

Takahashi, T

Tanimori, T

Tauchi, T

Teramoto, Y

机构：

[1] Nagoya Univ, Dept Phys, Nagoya, Aichi 464, Japan

[2] KEK, High Energy Accelerator Res Org, Tsukuba, Ibaraki 305, Japan

[3] Nara Womens Univ, Dept Phys, Nara 630, Japan

[4] Tokyo Inst Technol, Dept Phys, Tokyo 152, Japan

[5] Tokyo Univ Agr & Technol, Dept Appl Phys, Tokyo 184, Japan

[6] Univ Tokyo, Dept Phys, Tokyo 113, Japan

[7] Osaka City Univ, Dept Phys, Osaka 558, Japan

[8] Purdue Univ, Dept Phys, W Lafayette, IN 47907 USA

[9] Univ Tokyo, Inst Nucl Study, Tanashi, Tokyo 188, Japan

[10] Kobe Univ, Grad Sch Sci & Technol, Kobe, Hyogo 657, Japan

[11] Tezukayama Gakuin Univ, Fac Liberal Arts, Nara 631, Japan

来源：

PHYSICS LETTERS B | 1997年 / 413卷 / 3-4期

关键词：

D O I：

10.1016/S0370-2693(97)01191-X

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Charged-particle multiplicity was studied in e(+)e(-) annihilation at root s = 57.8 GeV using the TOPAZ detector at TRISTAN. The average multiplicity was [n(ch)] = 17.64 +/- 0.05(stat.) +/- 0.41(syst.). It was found that the multiplicity depends on the thrust (T) of an event. From extrapolating this relation to T = 2/3, the multiplicity for three-fold symmetric events was estimated to be [n(ch)](T=2/3) = 23.50(-1.45)(+1.25). From this, the multiplicity ratio between gluon-and quark-jet was estimated to be r(g/q) = 1.46(-0.13)(+0.09) without any possible bias from jet clustering. (C) 1997 Elsevier Science B.V.

引用

页码：447 / 452

页数：6

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