Asymmetries in the production of Λ0 in 250 GeV/c π±, K± and p-nucleon interactions

被引：8

作者：

Alves, GA ^{[1
]}

Amato, S

Anjos, JC

Appel, JA

Astorga, J

Bernard, T

Bracker, SB

Cremaldi, LM

Dagenhart, WD

Darling, CL

Errede, D

Fenker, HC

Gay, C

Green, DR

Jedicke, R

Karchin, PE

Kwan, S

Lueking, LH

Neto, JRTD

Metheny, J

Milburn, RH

de Miranda, JM

da Motta, H

Napier, A

Nicola, MS

Passmore, D

Rafatian, A

dos Reis, AC

Ross, WR

Santoro, AFS

Sheaff, M

Souza, MHG

Stoughton, C

Streetman, ME

Summers, DJ

Takach, SF

Wallace, A

Wu, Z

机构：

[1] Ctr Brasileiro Pesquisas Fis, Rio De Janeiro, Brazil

[2] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA

[3] Univ Mississippi, University, MS 38677 USA

[4] Univ Toronto, Toronto, ON M5S 1A7, Canada

[5] Tufts Univ, Medford, MA 02155 USA

[6] Wayne State Univ, Detroit, MI 48202 USA

[7] Univ Wisconsin, Madison, WI 53706 USA

[8] Yale Univ, New Haven, CT 06511 USA

来源：

PHYSICS LETTERS B | 2003年 / 559卷 / 3-4期

关键词：

D O I：

10.1016/S0370-2693(03)00335-6

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Using data from Fermilab fixed-target experiment E769, we have measured particle-antiparticle production asymmetries for Lambda(0) hyperons in 250 GeV/c pi(+/-), K+/- and p-nucleon interactions. The asymmetries are measured as functions of Feynman-chi (chi(F)) and p(T)(2) over the ranges -0.12 less than or equal to chi(F) less than or equal to 0.12 and 0 less than or equal to P-T(2) less than or equal to 3 (GeV/c)(2) (for positive beam) and -0.12 less than or equal to chi(F) less than or equal to 0.4 and 0 less than or equal to P-T(2) less than or equal to 10 (GeV/c)(2) (for negative beam). We find substantial asymmetries, even at chi(F) around zero. We also observe leading-particle-type asymmetries. These latter effects are qualitatively as expected from valence-quark content of the target and variety of projectiles studied. (C) 2003 Published by Elsevier Science B.V.

引用

页码：179 / 186

页数：8

共 50 条

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[2] INCLUSIVE PRODUCTION OF PI-0 MESONS IN PI(+)P,K(+)P, AND PP INTERACTIONS AT 250 GEV/C
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