Measurement Of The Cross-Section For The Process Gamma Gamma -> P(P)Over-Bar Root S(Ee)=183-189 Gev At Lep G Abbiendi , C Ainsley , Pf Akesson , G Alexander , J Allison , P Amaral , G Anagnostou , Kj Anderson , S Arcelli , S Asai , D Axen , G Azuelos , I Bailey , E Barberio , T Barillari , Rj Barlow , Rj Batley , P Bechtle , T Behnke , Kw Bell , Pj Bell , G Bella , A Bellerive , G Benelli , S Bethke , O Biebel , Ij Bloodworth , O Boeriu , P Bock , D Bonacorsi , M Boutemeur , S Braibant , L Brigliadori , Rm Brown , K Buesser , Hj Burckhart , S Campana , Rk Carnegie , B Caron , Aa Carter , Jr Carter , Cy Chang , Dg Charlton , A Csilling , M Cuffiani , S Dado , Gm Dallavalle , S Dallison , A De Roeck , Ea De Wolf , K Desch , B Dienes , M Donkers , J Dubbert , E Duchovni , G Duckeck , Ip Duerdoth , E Elfgren , E Etzion , F Fabbri , L Feld , P Ferrari , F Fiedler , I Fleck , M Ford , A Frey , A Furtjes , P Gagnon , Jw Gary , G Gaycken , C Geich-Gimbel , G Giacomelli , P Giacomelli , M Giunta , J Goldberg , E Gross , J Grunhaus , M Gruwe , Po Gunther , A Gupta , C Hajdu , M Hamann , Gg Hanson , K Harder , A Harel , M Harin-Dirac , M Hauschild , J Hauschildt , Cm Hawkes , R Hawkings , Rj Hemingway , C Hensel , G Herten , Rd Heuer , Jc Hill , K Hoffman , Rj Homer , D Horvath , R Howard , P Huntemeyer , P Igo-Kemenes , K Ishii , H Jeremie , P Jovanovic , Tr Junk , N Kanaya , J Kanzaki , G Karapetian , D Karlen , V Kartvelishvili , K Kawagoe , T Kawamoto , Rk Keeler , Rg Kellogg , Bj Kennedy , Dh Kim , K Klein , A Klier , S Kluth , T Kobayashi , M Kobel , S Komamiya , L Kormos , Rv Kowalewski , T Kramer , T Kress , P Krieger , J Von Krogh , D Krop , K Kruger , M Kupper , Gd Lafferty , H Landsman , D Lanske , Jg Layter , A Leins , D Lellouch , J Letts , L Levinson , J Lillich , Sl Lloyd , Fk Loebinger , J Lu , J Ludwig , A Macpherson , W Mader , S Marcellini , Te Marchant , Aj Martin , Jp Martin , G Masetti , T Mashimo , P Mattig , Wj Mcdonald , J Mckenna , Tj Mcmahon , Ra Mcpherson , F Meijers , P Mendez-Lorenzo , W Menges , Fs Merritt , H Mes , A Michelini , S Mihara , G Mikenberg , Dj Miller , S Moed , W Mohr , T Mori , A Mutter , K Nagai , L Nakamura , Ha Neal , R Nisius , Sw O'Neale , A Oh , A Okpara , Mj Oreglia , S Orito , C Pahl , G Pasztor , Jr Pater , Gn Patrick , Je Pilcher , J Pinfold , De Plane , B Poli , J Polok , O Pooth , M Przybycien , A Quadt , K Rabbertz , C Rembser , P Renkel , H Rick , Jm Roney , S Rosati , Y Rozen , K Runge , K Sachs , T Saeki , O Sahr , Ekg Sarkisyan , Ad Schaile , O Schaile , P Scharff-Hansen , J Schieck , T Schoerner-Sadenius , M Schroder , M Schumacher , C Schwick , Wg Scott , R Seuster , Tg Shears , Bc Shen , Ch Shepherd-Themistocleous , P Sherwood , G Siroli , A Skuja , Am Smith , R Sobie , S Soldner-Rembold , S Spagnolo , F Spano , A Stahl , K Stephens , D Strom , R Strohmer , S Tarem , M Tasevsky , Rj Taylor , R Teuscher , Ma Thomson , E Torrence , D Toya , P Tran , T Trefzger , A Tricoli , I Trigger , Z Trocsanyi , E Tsur , Mf Turner-Watson , I Ueda , B Ujvari , B Vachon , Cf Vollmer , P Vannerem , M Verzocchi , H Voss , J Vossebeld , D Waller , Cp Ward , Dr Ward , Pm Watkins , At Watson , Nk Watson , Ps Wells , T Wengler , N Wermes , D Wetterling , Gw Wilson , Ja Wilson , G Wolf , Tr Wyatt , S Yamashita , D Zer-Zion , L Zivkovic EUROPEAN PHYSICAL JOURNAL C（2003）
摘要
The exclusive production of proton-antiproton pairs in the collisions of two quasi-real photons has been studied using data taken at rootS(ee) = 183 GeV and 189 GeV with the OPAL detector at LEP. Results are presented for p (p) over bar invariant masses, W, in the range 2.15 < W < 3.95 GeV. The cross-section measurements are compared with previous data and with recent analytic calculations based on the quark-diquark model.
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