ENHANCED LEADING PRODUCTION OF D(PLUS-OR-MINUS) AND D-ASTERISK(PLUS-OR-MINUS) IN 250-GEV PI(PLUS-OR-MINUS) NUCLEON-INTERACTIONS

被引：95

作者：

ALVES, GA

AMATO, S

ANJOS, JC

APPEL, JA

ASTORGA, J

BERNARD, T

BRACKER, SB

CREMALDI, LM

DARLING, CL

DIXON, RL

ERREDE, D

GAY, C

GREEN, DR

JEDICKE, R

KARCHIN, PE

KWAN, S

LUEKING, LH

NETO, JRTD

METHENY, J

MILBURN, RH

DEMIRANDA, JM

DAMOTTA, H

NAPIER, A

PASSMORE, D

RAFATIAN, A

DOSREIS, AC

ROSS, WR

SANTORO, AFS

SHEAFF, M

SOUZA, MHG

SPALDING, WJ

STOUGHTON, C

STREETMAN, ME

SUMMERS, DJ

TAKACH, SF

WALLACE, A

WU, Z

机构：

[1] FERMILAB NATL ACCELERATOR LAB,BATAVIA,IL 60510

[2] UNIV MISSISSIPPI,OXFORD,MS 38677

[3] UNIV TORONTO,TORONTO M5S 1A7,ONTARIO,CANADA

[4] TUFTS UNIV,MEDFORD,MA 02155

[5] UNIV WISCONSIN,MADISON,WI 53706

[6] YALE UNIV,NEW HAVEN,CT 06511

来源：

PHYSICAL REVIEW LETTERS | 1994年 / 72卷 / 06期

关键词：

D O I：

10.1103/PhysRevLett.72.812

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A leading charm meson is one with longitudinal momentum fraction, x(F) > 0, whose light quark (or antiquark) is of the same type as one of the quarks in the beam particle. We report on the production asymmetry, A = [sigma(leading) - sigma(nonleading)]/[sigma(leading) + sigma(nonleading)] as a function of x(F). The data consist of 1500 fully reconstructed D+/- and D*+/- decays in Fermilab experiment E769. We find a significant asymmetry at large x(F), consistent with the recent result of CERN experiment WA82. Such an asymmetry for the production of charm quarks is not expected in perturbative quantum chromodynamics.

引用

页码：812 / 815

页数：4

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