EVIDENCE FOR ENHANCEMENT OF GLUON AND VALENCE-QUARK DISTRIBUTIONS IN NUCLEI FROM HARD LEPTON-NUCLEUS PROCESSES

被引：97

作者：

FRANKFURT, LL

STRIKMAN, MI

LIUTI, S

机构：

[1] LENINGRAD NUCL PHYS INST,GATCHINA 188350,USSR

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

来源：

PHYSICAL REVIEW LETTERS | 1990年 / 65卷 / 14期

关键词：

D O I：

10.1103/PhysRevLett.65.1725

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Current data on deep-inelastic processes off nuclei are analyzed by using exact QCD sum rules for the total momentum and baryon charge of nuclei. Evidence for an overall enhancement of the gluon field in heavy nuclei (4%) is found which, combined with the calculation of nuclear shadowing, yields a substantial enhancement of valence-quark and gluon distributions at xS0.1, as well as a suppression of the sea for x0.1. It is also shown that scaling violations lead to a strong decrease of shadowing for the sea at xS0.05. Implications for disentangling the origin of internuclear forces are further discussed. © 1990 The American Physical Society.

引用

页码：1725 / 1728

页数：4

共 13 条

[1] NUCLEAR-DEPENDENCE OF DIMUON PRODUCTION AT 800 GEV [J].

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 .

PHYSICAL REVIEW LETTERS, 1990, 64 (21) :2479-2482

[2] SHADOWING IN DEEP INELASTIC MUON SCATTERING FROM NUCLEAR TARGETS [J].

ARNEODO, M ;

ARVIDSON, A ;

AUBERT, JJ ;

BADELEK, B ;

BEAUFAYS, J ;

BEE, CP ;

BENCHOUK, C ;

BERGHOFF, G ;

BIRD, I ;

BLUM, D ;

BOHM, E ;

DEBOUARD, X ;

BRASSE, FW ;

BRAUN, H ;

BROLL, C ;

BROWN, S ;

BRUCK, H ;

BRULL, A ;

CALEN, H ;

CHIMA, JS ;

CIBOROWSKI, J ;

CLIFFT, R ;

COIGNET, G ;

COMBLEY, F ;

COUGHLAN, J ;

DAGOSTINI, G ;

DAHLGREN, S ;

DENGLER, F ;

DERADO, I ;

DREYER, T ;

DREES, J ;

DROBNITZKI, M ;

DUREN, M ;

ECKARDT, V ;

EDWARDS, A ;

EDWARDS, M ;

ERNST, T ;

ESZES, G ;

FAVIER, J ;

FERRERO, MI ;

FIGIEL, J ;

FOSTER, J ;

FTACNIK, J ;

GABATHULER, E ;

GAJEWSKI, J ;

GAMET, R ;

GEDDES, N ;

GRAFSTROM, P ;

GUSTAFSSON, L ;

HAAS, J .

PHYSICS LETTERS B, 1988, 211 (04) :493-499

[3] MEASUREMENT OF THE RATIOS OF DEEP INELASTIC MUON-NUCLEUS CROSS-SECTIONS ON VARIOUS NUCLEI COMPARED TO DEUTERIUM [J].

ASHMAN, J ;

BADELEK, B ;

BAUM, G ;

BEAUFAYS, J ;

BEE, CP ;

BENCHOUK, C ;

BIRD, IG ;

BROWN, SC ;

CAPUTO, MC ;

CHEUNG, HWK ;

CHIMA, J ;

CIBOROWSKI, J ;

CLIFFT, RW ;

COIGNET, G ;

COMBLEY, F ;

COURT, G ;

DAGOSTINI, G ;

DREES, J ;

DUREN, M ;

DYCE, N ;

EDWARDS, AW ;

EDWARDS, M ;

ERNST, T ;

FERRERO, MI ;

FRANCIS, D ;

GABATHULER, E ;

GAJEWSKI, J ;

GAMET, R ;

GIBSON, V ;

GILLIES, J ;

GRAFSTROM, P ;

HAGBERG, E ;

HAMACHER, K ;

VONHARRACH, D ;

HAYMAN, P ;

HOLT, JR ;

HUGHES, VW ;

JACHOLKOWSKA, A ;

JONES, T ;

KABUSS, EM ;

KORZEN, B ;

KRUNER, U ;

KULLANDER, S ;

LANDGRAF, U ;

LANSKE, D ;

LETTENSTROM, F ;

LINDQVIST, T ;

MATTHEWS, M ;

MIZUNO, Y ;

MONIG, K .

PHYSICS LETTERS B, 1988, 202 (04) :603-610

[4] SHADOWING AND ANTISHADOWING OF NUCLEAR-STRUCTURE FUNCTIONS [J].

BRODSKY, SJ ;

LU, HJ .

PHYSICAL REVIEW LETTERS, 1990, 64 (12) :1342-1345

[5] QCD PARTON RECOMBINATION AND APPLICATIONS TO NUCLEAR-STRUCTURE FUNCTIONS [J].

CLOSE, FE ;

QIU, JW ;

ROBERTS, RG .

PHYSICAL REVIEW D, 1989, 40 (09) :2820-2831

[6] HARD NUCLEAR PROCESSES AND MICROSCOPIC NUCLEAR-STRUCTURE [J].

FRANKFURT, L ;

STRIKMAN, M .

PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS, 1988, 160 (5-6) :235-427

[7] SHADOWING AND ENHANCEMENT OF QUARK DISTRIBUTION IN NUCLEI AT SMALL X [J].

FRANKFURT, LL ;

STRIKMAN, MI .

NUCLEAR PHYSICS B, 1989, 316 (02) :340-354

[8]

FRANKFURT LL, 1985, SOV J NUCL PHYS, V41, P308

[9]

LANDGRAF V, 1990, IN PRESS JUN P INT C

[10] GLUON RECOMBINATION AND SHADOWING AT SMALL VALUES OF-PI [J].

MUELLER, AH ;

QIU, J .

NUCLEAR PHYSICS B, 1986, 268 (02) :427-452

← 1 2 →