NUCLEAR-DEPENDENCE OF HIGH-XT HADRON AND HIGH-TAU HADRON-PAIR PRODUCTION IN P-A INTERACTIONS AT SQUARE-ROOT-S=38.8 GEV

被引：70

作者：

STRAUB, PB

JAFFE, DE

GLASS, HD

ADAMS, MR

BROWN, CN

CHARPAK, G

COOPER, WE

CRITTENDEN, JA

FINLEY, DA

GRAY, R

HEMMI, Y

HSIUNG, YB

HUBBARD, JR

JONCKHEERE, AM

JOSTLEIN, H

KAPLAN, DM

LEDERMAN, LM

LUK, KB

MAKI, A

MANGEOT, P

MCCARTHY, RL

MIYAKE, K

PLAAG, RE

RUTHERFOORD, JP

SAKAI, Y

SANTIARD, JC

SAULI, F

SMITH, SR

YOSHIDA, T

YOUNG, KK

机构：

[1] CENS,F-91190 GIF SUR YVETTE,FRANCE

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

[3] COLUMBIA UNIV,NEW YORK,NY 10027

[4] FERMI NATL ACCELERATOR LAB,BATAVIA,IL 60510

[5] FLORIDA STATE UNIV,TALLAHASSEE,FL 32306

[6] NATL LAB HIGH ENERGY PHYS,KEK,TSUKUBA,IBARAKI 305,JAPAN

[7] KYOTO UNIV,KYOTO 606,JAPAN

[8] SUNY STONY BROOK,STONY BROOK,NY 11794

来源：

PHYSICAL REVIEW LETTERS | 1992年 / 68卷 / 04期

关键词：

D O I：

10.1103/PhysRevLett.68.452

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present a high-statistics, species-identified measurement of the W-to-Be per-nucleon cross-section ratio, R(W/Be), for high-x(t) hadrons and high-tau h+h- pairs produced in p-A collisions at square-root s = 38.8 GeV. The data extend to 0.62 in x(t) and 0.39 in square-root-tau. For single hadrons, R(W/Be) peaks at p(t) almost-equal-to 5 GeV/c and decreases to almost-equal-to 1 for mesons with p(t) > 8 GeV/c. At fixed p(t), R(W/Be) falls with square-root s. For symmetric pairs With square-root-tau > 0.28, R(W/Be) = 0.84 +/- 0.02 +/- 0.07, suggesting a nuclear suppression of high-z fragmentation. R(W/Be) increases with p(out), indicative of constituent multiple scattering.

引用

页码：452 / 455

页数：4

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