Asymmetries between the production of D-s(-) and D-s(+) mesons from 500 GeV/c pi(-) nucleon interaction as functions of x(F) and p(t)(2)

被引：53

作者：

Aitala, EM

Amato, S

Anjos, JC

Appel, JA

Ashery, D

Banerjee, S

Bediaga, I

Blaylock, G

Bracker, SB

Burchat, PR

Burnstein, RA

Carter, T

Carvalho, HS

Copty, NK

Cremaldi, LM

Darling, C

Denisenko, K

Fernandez, A

Gagnon, P

Gobel, C

Gounder, K

Halling, AM

Herrera, G

Hurvits, G

James, C

Kasper, PA

Kwan, S

Langs, DC

Leslie, J

Lundberg, B

MayTalBeck, S

Meadows, B

Neto, JRTD

Mihalcea, D

Milburn, RH

deMiranda, JM

Napier, A

Nguyen, A

DOliveira, AB

OShaughnessy, K

Peng, KC

Perera, LP

Purohit, MV

Quinn, B

Radeztsky, S

Rafatian, A

Reay, NW

Reidy, JJ

dosReis, AC

Rubin, HA

机构：

[1] UNIV MASSACHUSETTS, AMHERST, MA 01003 USA

[2] KANSAS STATE UNIV, MANHATTAN, KS 66506 USA

[3] ILLINOIS INST TECHNOL, CHICAGO, IL 60616 USA

[4] FERMILAB NATL ACCELERATOR LAB, BATAVIA, IL 60510 USA

[5] CINVESTAV, MEXICO CITY 14000, DF, MEXICO

[6] UNIV CINCINNATI, CINCINNATI, OH 45221 USA

[7] UNIV CALIF SANTA CRUZ, SANTA CRUZ, CA 95064 USA

[8] CTR BRASILEIRO PESQUISAS FIS, RIO DE JANEIRO, BRAZIL

[9] OHIO STATE UNIV, COLUMBUS, OH 43210 USA

[10] PRINCETON UNIV, PRINCETON, NJ 08544 USA

[11] UNIV AUTONOMA PUEBLA, MEXICO CITY, DF, MEXICO

[12] UNIV S CAROLINA, COLUMBIA, SC 29208 USA

[13] STANFORD UNIV, STANFORD, CA 94305 USA

[14] TEL AVIV UNIV, IL-69978 TEL AVIV, ISRAEL

[15] TUFTS UNIV, MEDFORD, MA 02155 USA

[16] UNIV WISCONSIN, MADISON, WI 53706 USA

[17] YALE UNIV, NEW HAVEN, CT 06511 USA

来源：

PHYSICS LETTERS B | 1997年 / 411卷 / 1-2期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/S0370-2693(97)00952-0

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present measurements of the production of D-2(-) mesons relative to D-s(+) mesons as functions of x(F) and of p(t)(2) for a sample of 2445 D-s decays to phi pi. The D-s mesons were produced in Fermilab experiment E791 with 500 GeV/c pi(-) mesons incident on one platinum and four carbon foil targets. The acceptance-corrected integrated asymmetry in the x(F) range -0.1 to 0.5 for Ds(-/+) mesons is 0.032 +/- 0.022 +/- 0.022, consistent with no net asymmetry. We compare the results as functions of x(F) and p(t)(2) to predictions and to the large production asymmetry observed for D+/- mesons in the same experiment. These comparisons support the hypothesis that production asymmetries come from the fragmentation process and not from the charm quark production itself. (C) 1997 published by Elsevier Science B.V.

引用

页码：230 / 236

页数：7

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