PRODUCTION OF PROMPT ELECTRONS IN THE CHARM PT REGION AT SQUARE-ROOT-S= 630-GEV

被引：33

作者：

BOTNER, O

EEK, LO

EKELOF, T

FRANSSON, K

HALLGREN, A

KOSTARAKIS, P

LENZEN, G

LUNDJENSEN, B

机构：

[1] CERN,CH-1211 GENEVA 23,SWITZERLAND

[2] DEMOCRITOS NUCL RES CTR,GR-15310 ATHENS,GREECE

[3] UNIV GESAMTHSCH WUPPERTAL,W-5600 WUPPERTAL 1,GERMANY

来源：

PHYSICS LETTERS B | 1990年 / 236卷 / 04期

关键词：

D O I：

10.1016/0370-2693(90)90389-N

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The production of prompt electrons at s = 630 GeV has been measured in the pt range 0.5-2.0 GeV/c and the pseudorapidity range 1.1-1.7, using a ring imaging Cherenkov (RICH) counter installed in the UA2 experiment at the CERN pp̄ collider. From our measurement of the electron/hadron ratio in the pt range 0.9-1.5 GeV/c we conclude that the total charm production cross section at s = 630 GeV does not exceed 1.9 mb at 95% CL. As our best estimate we obtain σtot(c c ̄)=0.68 ±0.56 (stat.) ±0.25 (sys., exp.)±0.21 (sys., theory) mb. © 1990.

引用

页码：488 / 494

页数：7

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