WHY PHOTOPRODUCTION OF CHARMONIUM ON NUCLEI DOES NOT MEASURE THE CHARMONIUM-NUCLEON TOTAL CROSS-SECTION

被引：39

作者：

BENHAR, O

KOPELIOVICH, BZ

MARIOTTI, C

NIKOLAEV, NN

ZAKHAROV, BG

机构：

[1] JOINT INST NUCL RES,NUCL PROBLEMS LAB,MOSCOW 101000,USSR

[2] IST SUPER SANITA,IST NAZL FIS NUCL,SEZ SANITA,PHYS LAB,I-00161 ROME,ITALY

[3] LD LANDAU THEORET PHYS INST,MOSCOW 117940,USSR

[4] MV LOMONOSOV STATE UNIV,NUCL RES INST,HIGH ENERGY LAB,MOSCOW 117234,USSR

[5] IST NAZL FIS NUCL,TURIN,ITALY

[6] UNIV TURIN,DIPARTIMENTO FIS TEOR,I-10125 TURIN,ITALY

来源：

PHYSICAL REVIEW LETTERS | 1992年 / 69卷 / 08期

关键词：

D O I：

10.1103/PhysRevLett.69.1156

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We show that color transparency produces either strong nuclear shadowing or antishadowing, depending on the specific (semi)exclusive photoproduction reaction off nuclei. Neither coherent nor quasielastic diffractive photoproduction of charmonium on nuclei measures the charmonium-nucleon total cross section and the vector-dominance-model interpretation of nuclear photoproduction data cannot be applied. We relate the A dependence of the coherent and quasielastic photoproduction cross sections and derive the energy dependence of shadowing. The results are in good agreement with the New Muon Collaboration data.

引用

页码：1156 / 1159

页数：4

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