EXTRACTION OF THE GLUON DENSITY OF THE PROTON AT X

被引：97

作者：

DERRICK, M

KRAKAUER, D

MAGILL, S

MUSGRAVE, B

REPOND, J

SCHLERETH, J

STANEK, R

TALAGA, RL

THRON, J

ARZARELLO, F

AYAD, R

BARI, G

BASILE, M

BELLAGAMBA, L

BOSCHERINI, D

BRUNI, A

BRUNI, G

BRUNI, P

ROMEO, GC

CASTELLINI, G

CHIARINI, M

CIFARELLI, L

CINDOLO, F

CIRALLI, F

CONTIN, A

DAURIA, S

FRASCONI, F

GIALAS, I

GIUSTI, P

IACOBUCCI, G

LAURENTI, G

LEVI, G

MARGOTTI, A

MASSAM, T

NANIA, R

NEMOZ, C

PALMONARI, F

POLINI, A

SARTORELLI, G

TIMELLINI, R

GARCIA, YZ

ZICHICHI, A

BARGENDE, A

CRITTENDEN, J

DESCH, K

DIEKMANN, B

DOEKER, T

ECKERT, M

FELD, L

FREY, A

机构：

[1] UNIV BOLOGNA, BOLOGNA, ITALY

[2] IST NAZL FIS NUCL, I-40126 BOLOGNA, ITALY

[3] UNIV BONN, INST PHYS, W-5300 BONN, GERMANY

[4] UNIV BRISTOL, HH WILLS PHYS LAB, BRISTOL BS8 1TL, AVON, ENGLAND

[5] BROOKHAVEN NATL LAB, UPTON, NY 11973 USA

[6] UNIV CALABRIA, DEPT PHYS, I-87036 COSENZA, ITALY

[7] IST NAZL FIS NUCL, COSENZA, ITALY

[8] COLUMBIA UNIV, NEVIS LABS, IRVINGTON, NY USA

[9] INST NUCL PHYS, KRAKOW, POLAND

[10] ACAD MIN & MET, FAC PHYS & NUCL TECHNIQUES, KRAKOW, POLAND

[11] JAGIELLONIAN UNIV, DEPT PHYS, KRAKOW, POLAND

[12] DESY, W-2000 HAMBURG, GERMANY

[13] DESY ZEUTHEN, INST HOCHENERGIEPHYS, ZEUTHEN, GERMANY

[14] UNIV FLORENCE, FLORENCE, ITALY

[15] IST NAZL FIS NUCL, I-50125 FLORENCE, ITALY

[16] IST NAZL FIS NUCL, LAB NAZL FRASCATI, I-00044 FRASCATI, ITALY

[17] UNIV FREIBURG, FAK PHYS, W-7800 FREIBURG, GERMANY

[18] UNIV GLASGOW, DEPT PHYS & ASTRON, GLASGOW, LANARK, SCOTLAND

[19] UNIV HAMBURG, INST EXPTL PHYS 1, HAMBURG, GERMANY

[20] UNIV HAMBURG, INST EXPTL PHYS 2, W-2000 HAMBURG, GERMANY

[21] UNIV LONDON IMPERIAL COLL SCI TECHNOL & MED, HIGH ENERGY NUCL PHYS GRP, LONDON, ENGLAND

[22] UNIV IOWA, DEPT PHYS & ASTRON, IOWA CITY, IA 52242 USA

[23] KFA JULICH, INST KERNPHYS, JULICH, GERMANY

[24] KOREA UNIV, SEOUL 136701, SOUTH KOREA

[25] LOUISIANA STATE UNIV, DEPT PHYS & ASTRON, BATON ROUGE, LA 70803 USA

[26] UNIV AUTONOMA MADRID, DEPT FIS TEOR, MADRID, SPAIN

[27] UNIV MANITOBA, DEPT PHYS, WINNIPEG, MB R3T 2N2, CANADA

[28] MCGILL UNIV, DEPT PHYS, MONTREAL, PQ, CANADA

[29] MOSCOW PHYS ENGN INST, MOSCOW, RUSSIA

[30] MOSCOW MV LOMONOSOV STATE UNIV, INST NUCL PHYS, MOSCOW, RUSSIA

[31] NIKHEF H, 1009 DB AMSTERDAM, NETHERLANDS

[32] UNIV AMSTERDAM, AMSTERDAM, NETHERLANDS

[33] OHIO STATE UNIV, DEPT PHYS, COLUMBUS, OH 43210 USA

[34] UNIV OXFORD, DEPT PHYS, OXFORD, ENGLAND

[35] UNIV PADUA, DIPARTIMENTO FIS, PADUA, ITALY

[36] IST NAZL FIS NUCL, PADUA, ITALY

[37] PENN STATE UNIV, DEPT PHYS, UNIVERSITY PK, PA 16802 USA

[38] UNIV ROMA LA SAPIENZA, DIPARTIMENTO FIS, I-00185 ROME, ITALY

[39] IST NAZL FIS NUCL, ROME, ITALY

[40] RUTHERFORD APPLETON LAB, DIDCOT OX11 0QX, OXON, ENGLAND

[41] UNIV CALIF SANTA CRUZ, SANTA CRUZ, CA 95064 USA

[42] UNIV GESAMTHSCH SIEGEN, FACHBEREICH PHYS, W-5900 SIEGEN, GERMANY

[43] TEL AVIV UNIV, SCH PHYS, IL-69978 TEL AVIV, ISRAEL

[44] UNIV TOKYO, INST NUCL STUDY, TOKYO, JAPAN

[45] TOKYO METROPOLITAN UNIV, DEPT PHYS, TOKYO, JAPAN

[46] UNIV TURIN, DIPARTIMENTO FIS SPERIMENTALE, TURIN, ITALY

[47] IST NAZL FIS NUCL, I-10125 TURIN, ITALY

[48] UNIV TURIN, FAC SCI 2, ALESSANDRIA, ITALY

[49] IST NAZL FIS NUCL, ALESSANDRIA, ITALY

[50] UNIV TORONTO, DEPT PHYS, TORONTO, ON, CANADA

来源：

PHYSICS LETTERS B | 1995年 / 345卷 / 04期

基金：

美国国家科学基金会; 加拿大自然科学与工程研究理事会;

关键词：

D O I：

10.1016/0370-2693(95)00021-C

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The gluon momentum density xg(x, Q(2)) of the proton was extracted at Q(2) = 20 GeV2 for small values of x between 4 x 10(-4) and 10(-2) from the scaling violations of the proton structure function F-2 measured recently by ZEUS in deep inelastic neutral current ep scattering at HERA. The extraction was performed in two ways. Firstly, using a global NLO fit to the ZEUS data on F-2 at low x constrained by measurements from NMC at larger x; and secondly using published approximate methods for the solution of the GLAP QCD evolution equations. Consistent results are obtained. A substantial increase of the gluon density is found at small x in comparison with the NMC result obtained at larger values of x.

引用

页码：576 / 588

页数：13

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