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NUCLEAR-DEPENDENCE OF DIMUON PRODUCTION AT 800 GEV

被引：398
作者：
ALDE, DM
BAER, HW
CAREY, TA
GARVEY, GT
KLEIN, A
LEE, C
LEITCH, MJ
LILLBERG, JW
MCGAUGHEY, PL
MISHRA, CS
MOSS, JM
PENG, JC
BROWN, CN
COOPER, WE
HSIUNG, YB
ADAMS, MR
GUO, R
KAPLAN, DM
MCCARTHY, RL
DANNER, G
WANG, MJ
BARLETT, ML
HOFFMANN, GW
机构：
[1] FERMI NATL ACCELERATOR LAB,BATAVIA,IL 60510
[2] UNIV ILLINOIS,CHICAGO,IL 60680
[3] NO ILLINOIS UNIV,DE KALB,IL 60115
[4] SUNY STONY BROOK,STONY BROOK,NY 11794
[5] CASE WESTERN RESERVE UNIV,CLEVELAND,OH 44106
[6] UNIV CALIF LOS ALAMOS SCI LAB,LOS ALAMOS,NM 87545
[7] UNIV TEXAS,AUSTIN,TX 78712
来源：
PHYSICAL REVIEW LETTERS | 1990年 / 64卷 / 21期
关键词：
D O I：
10.1103/PhysRevLett.64.2479
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
A precise measurement of the atomic-mass dependence of dimuon production induced by 800-GeV protons is reported. Over 450 000 muon pairs with dimuon mass M4 GeV were recorded from targets of H2, C, Ca, Fe, and W. The ratio of dimuon yield per nucleon for nuclei versus H2, R=YA/Y2H, is sensitive to modifications of the antiquark sea in nuclei. No nuclear dependence of this ratio is observed over the range of target-quark momentum fraction 0.1<xt<0.3. For xt<0.1 the ratio is slightly less than unity for the heavy nuclei. These results are compared with predictions of models of the European Muon Collaboration effect. © 1990 The American Physical Society.
引用
收藏
页码：2479 / 2482
页数：4
相关论文
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