Measurement of high- Q 2 neutral-current e + p deep inelastic scattering cross-sections at HERA

G Abbiendi, Toshiyuki Abe, H Abramowicz,D Acosta,L Adamczyk, M Adamus,S H Ahn,C Amelung, An Shiz Hong,F Anselmo,P Antonioli, M Arneodo,T C Bacon,W Badgett,D C Bailey,A Bamberger, G Barbagli,G Bari,F Barreiro,O Barret,G L Bashindzhagian, Bashkirov,M Basile, L A T Bauerdick,B Bednarek, U Behrens,L Bellagamba,A Bertolin,S Bhadra,J K Bienlein,H E Blaikley,I Bohnet,C Bokel,S Boogert,A Bornheim,P Borzemski, D Boscherini,M Botje,J Breitweg, I Brock,N H Brook,R Brugnera,N Brummer,A Bruni,G Bruni,C Burgard,B D Burow, P Bussey,J M Butterworth,Ben Bylsma, A Caldwell, M Capua,G Cara Romeo,R Carlin,N Cartiglia,R J Cashmore,G Castellini,C D Catterall,D Chapin,S Chekanov,J Chwastowski,J Ciborowski, L Cifarelli,F Cindolo,R Cirio,P Cloth,K Coboken,C Coldewey, J E Cole,A Contin,A M Coopersarkar,N Coppola, C M Cormack,M Corradi,F Corriveau,M Costa,W N Cottingham,J Crittenden, Rod Cross,G Dagostini,S Dagan,F Dal Corso,M Dardo,S De Pasquale,R Deffner,O Deppe,M Derrick,A Deshpande,K Desler,R C E Devenish,S Dhawan,B A Dolgoshein, S Dondana, U Dosselli, A T Doyle,G Drews,Z Dulinski,L S Durkin,S Dusini,M Eckert,J K Edmonds,Y Eisenberg,S Eisenhardt,J Engelen,D Epperson,P Ermolov,A Eskreys,C P Fagerstroem,J P Fernandez,M I Ferrero,J Figiel,D Filges,Brian C Foster, C Foudas,A Foxmurphy,U Fricke,W R Frisken,T Fusayasu,T Gadaj,R Galea, E Gallo,G Garcia,A Garfagnini,N Gendner,I Gialas,J Gilmore, C M Ginsburg, P Giusti, L K Gladilin, C Glasman,Fredarick L Gobel,Yu A Golubkov,P Gottlicher,H J Grabosch,R Graciani, J Grosseknetter,G Grzelak,T W Haas, W Hain,R Hallwilton,R Hamatsu, D S Hanna, N Harnew,J C Hart,H Hartmann,J M Hartmann,G F Hartner,D Hasell,M E Hayes, E A Heaphy,Greg P Heath,Helen F Heath,K Hebbel,K Heinloth,L Heinz,J M Hernandez, C A Heusch,E Hilger,T Hirose,D Hochman,U Holm,K Homma,S J Hong,G Howell, V W Hughes, G Iacobucci,L Iannotti,Y Iga,M Inuzuka,T Ishii,H P Jakob,K Jelen,H Y Jeoung,Z Jing, K F Johnson,T W Jones,S Kananov,A Kappes,U Karshon, M Kasemann,U F Katz,D Kcira,R Kerger,M Khakzad,L A Khein,C L Kim,J Y Kim, D Kisielewska,S Kitamura, R Klanner,K Klimek,Wolfgang Koch,E Koffeman,P Kooijman,T Koop,N A Korotkova,I A Korzhavina,A Kotanski,U Kotz,A M Kowal,H Kowalski, T Z Kowalski,D Krakauer,A Kreisel, M Kuze,V A Kuzmin, L Labarga,L Lamberti,J B Lane,G Laurenti, J H Lee,Sang Woo Lee,G Levi,G M Levman,A Levy,H Lim,I T Lim,S Limentani,L Lindemann, T Y Ling,Wei Liu,B Lohr,E Lohrmann, K R Long,A Lopezduran Viani,O Yu Lukina,K J Ma, G Maccarrone,N Macdonald,S Magill,U Mallik, A Margotti,G Marini,P Markun,James F Martin, M Martinez, S Maselli,T Massam,A Mastroberardino,Takashi Matsushita, M C K Mattingly, S E K Mattingly, G J Mccance, N A Mccubbin,J D Mcfall,B Mellado,S Menary,A Meyer,A Meyerlarsen,J Milewski,M Milite, D B Miller,Monaco, Klaus Monig,T Monteiro,M Morandin,M Moritz,W N Murray,B Musgrave,Kunihiro Nagano,Suk Woo Nam, R Nania,A Nigro,Tetsuo Nishimura,D Notz,R J Nowak,V A Noyes,P Nylander,A Ochs,B Y Oh,J R Okrasinski,K Olkiewicz, R S Orr,M Y Pac,Sanjay Padhi, F Palmonari,I H Park, S K Park,J A Parsons,Ellen Frankel Paul,N Pavel,J M Pawlak,R Pawlak,P G Pelfer,A Pellegrino,F Pelucchi,C Peroni,A Pesci,M C Petrucci,M Pfeiffer,D Piccioni,Krzysztof Piotrzkowski,G Poelz,S Polenz,A Polini,M Posocco,A Prinias,A S Proskuryakov,M Przybycien,J Puga, A Quadt,H Raach,M Raso,J Rautenberg, I Redondo,D D Reeder,J Repond,S Ritz,M Riveline,M Rohde,E Rulikowskazarebska,O Ruske, M Ruspa,A Sabetfakhri, R Sacchi, H F W Sadrozinski,H Salehi,S Sampson,G Sartorelli,P R B Saull, A Savin,D H Saxon, Alan N Schechter, M Schioppa,S Schlenstedt,W B Schmidke,U Schneekloth,H Schnurbusch,O Schwarzer,F Sciulli,John T Scott,J K Sedgbeer, A Seiden,F Selonke,T P Shah,L M Shcheglova,D Sideris,M Sievers,D Simmons,L E Sinclair,I O Skillicorn,B Smalska, W H Smith, A Solano,A Solomin,D Son,M G Saintlaurent, A Staiano,D G Stairs,L Stanco, R W Stanek,A Stifutkin, S Stonjek,P B Straub,E Strickland,R Stroili,G Susinno,L Suszycki,M R Sutton,I Suzuki,J Tandler,Alexander Tapper,R J Tapper, E Tassi, J Terron,H G Tiecke, K Tokushuku,W S Toothacker,T Tsurugai,N Tuning,T Tymieniecka,K Umemori,A Vaiciulis, J J Velthuis,W Verkerke,C Voci,J H Vossebeld,L Votano, R Walczak,R Walker, S M Wang,D Waters,R Waugh, Arthur J Weber,J Whitmore,R Wichmann,K Wick,H Wieber,L Wiggers,T Wildschek,D C Williams, H H Wills,M Wing,M Wodarczyk,G Wolf,S Wolfle,U Wollmer,A K Wroblewski, S Yamada,Takuya Yamashita,Katsuya Yamauchi, Yoshio Yamazaki,R Yoshida,C Youngman,J Zajac,J A Zakrzewski,Y Zamora Garcia,L Zawiejski,F Zetsche, W Zeuner, Quansheng Zhu, A Zichichi,S A Zotkin,E De Wolf,J Del Peso,A Van Sighem

European Physical Journal C（1999）

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摘要

. The e^+p neutral-current deep inelastic scattering differential cross-sections dσ/dQ^2 , for Q^2 > 400 GeV ^2 , dσ /dx and dσ/dy , for Q^2 > 400 , 2500 and 10000 GeV ^2 , have been measured with the ZEUS detector at HERA. The data sample of 47.7 pb ^-1 was collected at a center-of-mass energy of 300 GeV. The cross-section, dσ/dQ^2 , falls by six orders of magnitude between Q^2 =400 and 40000 GeV ^2 . The predictions of the Standard Model are in very good agreement with the data. Complementing the observations of time-like Z^0 contributions to fermion-antifermion annihilation, the data provide direct evidence for the presence of Z^0 exchange in the space-like region explored by deep inelastic scattering.

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关键词

deep inelastic scattering,neutral current,cross section,center of mass,standard model

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