A STUDY OF THE CHARM AND BOTTOM QUARK PRODUCTION IN E+E- ANNIHILATION AT ROOT-S=58 GEV USING PROMPT ELECTRONS

被引：16

作者：

ABE, K

AMAKO, K

ARAI, Y

ARIMA, T

ASANO, Y

CHIBA, M

CHIBA, Y

DAIGO, M

FUKAWA, M

FUKUSHIMA, Y

HABA, J

HEMMI, Y

HIGUCHI, M

HINODE, F

HIROSE, T

HOMMA, Y

HOSHI, Y

HOSODA, N

ISHIHARA, N

KANATANI, E

KANDA, N

KANEMATSU, N

KANZAKI, J

KIKUCHI, R

KONDO, T

KORHONEN, TT

KRUGER, A

KURASHIGE, H

MACNAUGHTON, J

MATSUI, T

MIURA, M

MIYAKE, K

MORI, S

NAGASHIMA, Y

NAKAMURA, T

NAKANO, I

ODAKA, S

OGAWA, K

OHAMA, T

OHSUGI, T

OHYAMA, H

OKAMOTO, A

ONO, A

OYAMA, T

SAKAMOTO, H

SAKUDA, M

SATO, M

SATO, N

SHIODEN, M

SHIRAI, J

机构：

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

[2] UNIV TSUKUBA,INST APPL PHYS,TSUKUBA 305,JAPAN

[3] TOKYO METROPOLITAN UNIV,DEPT PHYS,HACHIOJI 19203,JAPAN

[4] YASUDA WOMENS JR COLL,HIROSHIMA 73101,JAPAN

[5] WAKAYAMA MED COLL,WAKAYAMA 64963,JAPAN

[6] TOHOKU GAKUIN UNIV,DEPT APPL PHYS,TAGAJO 985,JAPAN

[7] KOBE UNIV,SCH APPL MED SCI,KOBE 65401,JAPAN

[8] MIYAZAKI UNIV,FAC ENGN,MIYAZAKI 88901,JAPAN

[9] UNIV TSUKUBO,INST PHYS,TSUKUBA 305,JAPAN

[10] KOBE UNIV,COLL LIBERAL ART,KOBE 657,JAPAN

[11] IBARAKI COLL TECHNOL,KATSUTA 312,JAPAN

[12] KOGAKUIN UNIV,CTR INFORMAT SCI,TOKYO 16391,JAPAN

[13] TSUKUBA COLL TECHNOL,TSUKUBA 305,JAPAN

[14] NARUTO UNIV EDUC,NARUTO 772,JAPAN

[15] OSAKA UNIV,DEPT PHYS,TOYONAKA,OSAKA 560,JAPAN

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

[17] OKAYAMA UNIV,DEPT PHYS,OKAYAMA 700,JAPAN

[18] UNIV HELSINKI,HIGH ENERGY PHYS RES INST,SF-00170 HELSINKI 17,FINLAND

[19] HIROSHIMA UNIV,DEPT PHYS,HIROSHIMA 724,JAPAN

[20] INT CHRISTIAN UNIV,MITAKA,TOKYO 181,JAPAN

来源：

PHYSICS LETTERS B | 1993年 / 313卷 / 1-2期

关键词：

D O I：

10.1016/0370-2693(93)91226-D

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We have studied c (charm) and b (bottom) quark production at the TRISTAN energy region by tagging prompt electrons from the semileptonic decays. Electrons were identified over a wide momentum range between 1 and 29 GeV/c by a transition-radiation-detector in addition to a lead-glass calorimeter. The production cross sections of c and b quarks and the mean values of the fragmentation functions for c and b quarks were obtained as sigma(c) = 55.9 +/- 8.8 (stat.) +/- 7.9 (syst.) pb, sigma(b) = 13.1 +/- 2.9(stat.) +/- 1.0(syst.) pb, [x(c)] = 0.44 +/- 0.08 (stat.) +/- 0.04(syst.) and [x(b)] = 0.72 +/- 0.12(stat.) +/- 0.08(syst.), respectively. The forward-backward asymmetries of the c and b quarks were also measured to be -0.57 +/- 0.16(stat.) +/- 0.06(syst.) and -0.64 +/- 0.26(stat.) +/- 0.07(syst.), respectively. Both the cross sections and the forward-backward asymmetries of the c and b quarks are consistent with the standard model.

引用

页码：288 / 298

页数：11

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