DIRECT PHOTON PRODUCTION IN (P)OVER-BAR-P AND PP INTERACTIONS AT ROOT-S = 24.3GEV

被引：22

作者：

SOZZI, G

BALLOCCHI, G

BERNASCONI, A

BREEDON, RE

CAMILLERI, L

COOL, RL

COX, PT

CUSHMAN, P

DICK, L

DUKES, EC

GABIOUD, B

GAILLE, F

GIACOMELLI, P

HUBBARD, D

JEANNERET, JB

JOSEPH, C

KUBISCHTA, W

LOUDE, JF

MALAMUD, E

MOREL, C

OBERSON, P

OVERSETH, OE

PAGES, JL

PERROUD, JP

RUEGGER, D

RUSACK, RW

SINGH, V

SNOW, GR

STEINER, D

STUDER, L

TRAN, MT

VACCHI, A

VALENTI, G

WERLEN, M

机构：

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

[2] UNIV MICHIGAN,ANN ARBOR,MI 48109

[3] ROCKEFELLER UNIV,NEW YORK,NY 10021

[4] YALE UNIV,NEW HAVEN,CT 06511

来源：

PHYSICS LETTERS B | 1993年 / 317卷 / 1-2期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/0370-2693(93)91600-R

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Inclusive direct photon invariant cross sections have been measured in both ppBAR and pp collisions at square-root s = 24.3 GeV at the CERN SPS, permitting the first measurement of the difference of the ppBAR and pp cross sections. The direct photon cross section in ppBAR collisions has been found to be systematically larger than that in pp collisions, which indicates a significant contribution of the qqBAR annihilation term as predicted by theoretical calculations.

引用

页码：243 / 249

页数：7

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