Hadronic production of Λc from 600 GeV/c π-, Σ- and p beams

被引：55

作者：

Garcia, FG ^{[1
]}

Alkhazov, G

Atamantchouk, AG

Balatz, MY

Bondar, NF

Cooper, PS

Dauwe, LJ

Davidenko, GV

Dersch, U

Dolgolenko, AG

Dzyubenko, GB

Edelstein, R

Emediato, L

Endler, AMF

Engelfried, J

Eschrich, I

Escobar, CO

Evdokimov, AV

Filimonov, IS

Gaspero, M

Giller, I

Golovtsov, VL

Gouffon, P

Gülmez, E

He, KL

Iori, M

Jun, SY

Kaya, M

Kilmer, J

Kim, VT

Kochenda, LM

Konorov, I

Kozhevnikov, AP

Krivshich, AG

Krüger, H

Kubantsev, MA

Kubarovsky, VP

Kulyavtsev, AI

Kuropatkin, NP

Kurshetsov, VF

Kushnirenko, A

Kwan, S

Lach, J

Lamberto, A

Landsberg, LG

Larin, I

Leikin, EM

Li, YS

Luksys, M

机构：

[1] Univ Sao Paulo, Sao Paulo, Brazil

[2] Ist Nazl Fis Nucl, Trieste, Italy

[3] Univ Trieste, Trieste, Italy

[4] Ist Nazl Fis Nucl, Rome, Italy

[5] Univ Roma La Sapienza, Rome, Italy

[6] Univ Michigan, Flint, MI 48502 USA

[7] Univ Iowa, Iowa City, IA 52242 USA

[8] Univ Bristol, Bristol BS8 1TL, Avon, England

[9] Univ Fed Paraiba, BR-58059900 Joao Pessoa, Paraiba, Brazil

[10] Univ Autonoma San Luis Potosi, San Luis Potosi, Mexico

[11] Tel Aviv Univ, IL-69978 Tel Aviv, Israel

[12] Petersburg Nucl Phys Inst, St Petersburg, Russia

[13] Moscow MV Lomonosov State Univ, Moscow, Russia

[14] Max Planck Inst Kernphys, D-69117 Heidelberg, Germany

[15] Inst Theoret & Expt Phys, Moscow 117259, Russia

[16] Inst High Energy Phys, Beijing 100039, Peoples R China

[17] Inst High Energy Phys, Protvino, Russia

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

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

[20] Carnegie Mellon Univ, Pittsburgh, PA 15213 USA

[21] Bogazici Univ, TR-80815 Bebek, Istanbul, Turkey

[22] Ball State Univ, Muncie, IN 47306 USA

来源：

PHYSICS LETTERS B | 2002年 / 528卷 / 1-2期

基金：

巴西圣保罗研究基金会; 以色列科学基金会; 美国国家科学基金会;

关键词：

D O I：

10.1016/S0370-2693(01)01484-8

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present data from Fermilab experiment E781 (SELEX) on the hadroproduction asymmetry for (Lambda) over bar((c)) over bar compared to Lambda(c)(+) as a function of x(F), and on p(t)(2) distributions for Lambda(c)(+). These data were measured in the same apparatus using incident pi(-),Sigma(-) beams at 600 GeV/c and proton beam at 540 GeV/c. The asymmetry is studied as a function of x(F). In the forward hemisphere with x(F) greater than or equal to 0.2 both baryon beams exhibit very strong preference for producing charm baryons rather than charm antibaryons, while the pion beam asymmetry is much smaller. In this energy regime the results show that beam fragments play a major role in the kinematics of Lambda(c) formation, as suggested by the leading quark picture. (C) 2002 Published by Elsevier Science B.V.

引用

页码：49 / 57

页数：9

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