Extraction Of The Gluon Density Of The Proton At X

M Derrick, U Dosselli,N Cartiglia,R L Talaga,H Hultschig,Y Zamora Garcia,M Van Hook,E De Wolf,L S Durkin,P B Straub,M Iori,A Bertolin, U Behrens,G Drews, R Wedemeyer,A Polini, D Kisielewska,A Prinias,G Grzelak,C Youngman,J K Sedgbeer,K Wick,J Biltzinger,M Dardo,A Nigro,R Graciani,S S Wilson,Y Nakamitsu,B Musgrave,F Benard, D Boscherini,H Kowalski,P De Jong,S Kitamura,R G Feild,M De Giorgi,M Geerts,A Kotanski,Takayoshi Ishii,S Nagayama,S Mine,Y Eisenberg, Sigang Yang,B Hubbard,G Sartorelli,R Yoshida,J Bulmahn,D C Bailey,P Morawitz,A F Zarnecki,S Campbellrobson,R C E Devenish, F Chlebana, G Abbiendi,R J Nowak,B Gutjahr, J A Omara,I Gialas,Y Nagasawa,R Timellini,S De Pasquale, M Botje,J Repond, R W Stanek,U Holm, L A T Bauerdick,G M Levman,G Zech,T Massam,A Solomin,A Contin,M I Ferrero,L W Mo,M Hazumi,A Bargende,G Castellini,Krzysztof Piotrzkowski, F Cindolo, P Giusti,H F Sadrozinski, W H Smith,N Zotov, G Maccarrone,F Arzarello,E Barberis,T Poser, F Corriveau,G Levi,J J M Engelen, J Mollen,G R Smith,L Feld,S Soldnerrembold,Vivian Odell,A Ladage, V D D Kobrin, T Trefzger,L Zawiejski,Ben Bylsma,B Lohr,J A Parsons, H Abramowicz, C A Heusch,S Limentani,R Van Woudenberg,J T Rahn,Roberto Carlin,C D Catterall,A Eskreys,T A Romanowski,L Bellagamba,G Bari,Greg P Heath,S Mengel,Douglas L Westphal,D B Miller,M Chiba,T Dubbs,M Costa,E Lohrmann, M Krzyzanowski,I Fleck,M De Kamps,J Del Peso,J Labs,S Magill,D Schramm,D Krakauer,F Sciulli,J M Hernandez,I H Park,D Hasell,W Kroger, Richard Loveless,A Shapira,V A Jamieson,U Schneekloth,B Diekmann, A M Coopersarkar,W Hain,V L Harris,J M Schroder,J N Lim, S K Park,E Hilger,F Ciralli, M Grothe, M B Crombie, R Sacchi,R J Cashmore, K R Long,T Nagira,D D Reeder,R R Mcneil,J Whitmore,G Anzivino,A Furtjes, A T Doyle,M Posocco,B D Burow, C Glasman,C Peroni, G Iacobucci,B H Y Hung,K Ohrenberg,M Lowe,A Cassidy,L Wiggers,K W Mclean,U Karshon,Jorg Thomas Hartmann,S Nickel,M Brkic,R Seidlein,B H Behrens,A Bamberger,Takuo Hirose,U Kotz,J Zajac,H J Kim,M Przybycien,K Jelen,A Bernstein,S Bhadra,G Theisen,D Norman, Stephan Bottcher,W N Murray,P Borzemski, F Palmonari,G Cara Romeo,H Hessling,J Gajewski, A Goussiou,R Hamatsu, S W Nam,T W Jones,J F De Troconiz,K Heinloth, B A Dolgoshein,M H Suh,M Chiarini,C Fordham,P Kooijman,R S Gilmore,G Cases,K Honscheid,C Rethfeldt, M Vreeswijk,D M Gingrich,K Desch, A Margotti, D S Hanna, S M Hong,A Dannemann,R Sinkus,C G Matthews,D Daniels,P G Pelfer, K Tokushuku,T Doeker, W R Frisken,A F Whitfield, R Klanner,G Briskin,S Kartik,L Suszycki,T C Bacon,R Brugnera,M L Utley, N H Brook, R Beuselinck, Yuming Zhang,I Ali,T Yip, A Bruni,J L Thron,V K Nadendla,C Li,H Uijterwaal,Aharon Levy,K K Joo,M Morandin, D Acosta, P Bussey,K Eskreys,D J Gilkinson,L Stanco,A Leich,C Nath,J M Pawlak,Douglas A Luke,Helen F Heath,M Rohde,P Luffman,P Cloth,C Voci,G Marini,B Bednarek,C Nemoz, F F Wilson,S M Wang,T Tymieniecka,P Gottlicher,W Metcalf,M Flasinski, Emmanuel M Paul, M Basile,E Rulikowskazarebska,R Schattevoy, J Ciborowski,R R Rau, A K Wroblewski,T L Short, E Mccliment, N A Mccubbin,Wolfgang A Schulz,K Muchorowski,S Schlenstedt, J Terron,J Shulman,Saverio Dauria, A S Proskuryakov, A Tenner,C Coldewey,Till Neumann,T T Voss,M Roco,A Freidhof,K Blankenship, M Kasemann,Cjs Morgado, S M Mari, A Staiano, S Yamada,M Z Wang,E Badura,M Kasprzak,H Kammerlocher,U F Katz,V Bashkirov,I Butterworth,M J Eckart,D Filges,J Chwastowski, T Y Ling,M Zachara,D Notz, Werner Koch,K Homma,L Adamczyk,L Wai,A Mass, A Savin,S Dagan,S Qian,R Imlay,Simon George,P Ermolov,D H Saxon,J Kruger,V A Kuzmin,M Adamus,L E Sinclair, E Gallo,N Pavel,F Barreiro,J A Zakrzewski, T Z Kowalski,J T Wu,L Votano,R Stroili,A P Byrne, L K Gladilin,G A Blair,N Dyce,A Stifutkin,Andrew S Wilson,L Hervas,P Bruni,Tomonobu Hasegawa, R Walczak,J Puga,G Susinno, A Kruse,O Manczak,J B Lane,E Stiliaris,J Mainusch,J Mayer,D Revel,G Dagostini,K Prytz,M Lancaster,T Tsurugai, N Harnew, L Kopke, L Cifarelli,R Ullmann,B Lu,J S T Ng,R J Tapper,Yu A Golubkov,W Schott,C R Sampson, M Kuze, C Foudas, A Seiden, S Maselli,G Wolf,J D Mcfall,Arnulf Quadt, R J Teuscher,G L Bashindzhagian, W Verkerke,W Bogusz,T Haas,M St Laurent,G Laurenti,G Bruni,T J Llewellyn,J Milewski,R J Seifert,S H Yon,J L Schlereth,L Hagge,G Poelz,F Frasconi,H P Jakob,F Selonke,B Y Oh,J F Martin,G F Hartner,M Nakahata, C Rembser, A Caldwell,M Mattioli, G Barbagli,P B Kaziewicz,A Dake, Y Yamazaki, M Arneodo, A H Walenta,L W Hung, M Schioppa,D Bandyopadhyay, E Tassi,H J Grabosch, S Dasu,L M Shcheglova,J Roldan,M Nakao,R Ayed,P Joos,F Ikraiam,D G Stairs,K Charchula,J K Bienlein,J Kochocki,G Zacek, W S Lockman, A Zichichi,L Iannotti,H Hartmann, R S Orr, S Bentvelsen,S H An, R Nania,G Geitz,Samuel Silverstein,I Suzuki,J Crittenden,P M Patel,R Cirio, R L Saunders,J M Butterworth,S Ritz,U Mallik,D Horstmann,B Krebs,B Foster,L Lindemann,T Kedzierski,F Dal Corso,J C Hart,D Haun,Y Iga,F Zetsche,J Stamm,L Lamberti, L Labarga,H Tiecke,T P Shah,K M Furutani,A Frey, A Meyer, A Solano

PHYSICS LETTERS B（1995）

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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.

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