Measurement of Directf0(980)Photoproduction on the Proton

M Battaglieri,R De Vita,S Strauch,A Tkabladze,P Eugenio,H Bagdasaryan,J J Melone,J D Kellie,J Langheinrich,M Ripani,J Goett,S A Morrow,W J Briscoe,M Anghinolfi,V Batourine,G S Mutchler,B B Niczyporuk,M E Mccracken,N Gevorgyan,M J Amaryan,N Kalantarians,C Paterson,B S Ishkhanov,N Guler,V Sapunenko,S L Careccia,P Konczykowski,M Nozar,Ji Li,K V Dharmawardane,D I Sober,C Hanretty,M Khandaker,O P Dzyubak,S Pozdniakov,K S Egiyan,L Todor,E Wolin,O Pogorelko,B Mckinnon,S Dhamija,A Teymurazyan,R A Niyazov,I Hleiqawi,K Hicks,P V Degtyarenko,E Pasyuk,M Mirazita,A Fradi,A V Vlassov,J Hardie,P Stoler,H G Juengst,S Anefalos Pereira,M Kossov,C Tur,M Taiuti,A Starostin,C Djalali,P Mattione,D S Carman,R De Masi,M Bellis,S E Kuhn,D Doughty,K Moriya,G Asryan,F W Hersman,J M Laget,T Kageya,Y Ilieva,M Yurov,K L Giovanetti,K A Griffioen,N Markov,E Golovatch,J R Calarco,N Baillie,D Protopopescu,J Lachniet,R A Schumacher,E L Isupov,A Gasparian,D Branford,P L Cole,K Hafidi,L Casey,M Maccormick,D Sharov,N Hassall,L Graham,J Salamanca,I Niculescu,P Collins,M Guidal,A Yegneswaran,P Ambrozewicz,V S Serov,M D Mestayer,P Khetarpal,M Holtrop,E Clinton,I I Strakovsky,D G Ireland,M S Saini,V Gyurjyan,K Mikhailov,D Heddle,M Garçon,J P Santoro,S Tkachenko,C Bookwalter,D Sokhan,Z Krahn,S Stepanyan,N Dashyan,E De Sanctis,H S Jo,I Nakagawa,D P Watts,T A Forest,Y G Sharabian,W Kim,M R Niroula,K Livingston,G Niculescu,A Deur,L El Fassi,W Gohn,A I Ostrovidov,S Boiarinov,G Ricco,S Bültmann,G Rosner,F X Girod,N A Baltzell,S Malace,K P Adhikari,N Benmouna,M Aghasyan,D J Tedeschi,D P Weygand,M Osipenko,Y Prok,F Sabatié,H Hakobyan,R Bradford,S Niccolai,H Egiyan,G Gavalian,B L Berman,H Avakian,N Pivnyuk,I Bedlinskiy,M Ungaro,G E Dodge,B A Mecking,A Glamazdin ,G P Gilfoyle,M Moteabbed,J T Goetz,F J Klein,S Bouchigny,M Williams,Mark Paris ,A Biselli ,J Zhang,K S Joo ,C Hadjidakis,J Donnelly,G Fedotov,A M Sandorfi ,R Dickson,J W Price,K A Stopani,D Keller,J P Cummings,X Wei,L Elouadrhiri,B Moreno,C A Meyer,H Crannell,M Lowry,G Riccardi,Barry Ritchie ,V Kuznetsov,C Salgado,C I O Gordon ,B E Stokes,J Pierce,Liang Cheng ,P Nadel-Turoński ,R Fersch,Z W Zhao,M H Wood,D Crabb,E Munévar ,T Mineeva ,L Gan,A V Klimenko,S Chen,A Klein,V D Burkert,J Kühn ,H Y Lu,T Mibe,Łukasz Bibrzycki ,A Daniel,R Gothe ,J Ball ,N V Shvedunov,D Počanić ,P Rossi,M Gabrielyan ,V Credé ,V Mokeev,R Nasseripour,M M Ito,Adam P Szczepaniak ,D Lawrence,L Kramer ,M Dugger,R Hakobyan ,A Stavinsky,K Park,D Dale,J R Johnstone,S Park,B A Raue,R Miskimen,V V Mochalov ,L B Weinstein,D Schott,T Lee,W K Brooks,D Jenkins,V Kubarovsky,L C Smith,M F Vineyard,C E Hyde‐Wright ,L Leśniak ,S V Kuleshov,E S Smith,R Minehart,B Zhao,L Guo,L Zana

doi:10.1103/physrevlett.102.102001

Abstract

We report on the results of the first measurement of exclusive f0(980) meson photoproduction on protons for Eγ=3.0–3.8 GeV and −t=0.4–1.0 GeV2. Data were collected with the CLAS detector at the Thomas Jefferson National Accelerator Facility. The resonance was detected via its decay in the π+π− channel by performing a partial wave analysis of the reaction γp→pπ+π−. Clear evidence of the f0(980) meson was found in the interference between P and S waves at Mπ+π−∼1 GeV. The S-wave differential cross section integrated in the mass range of the f0(980) was found to be a factor of about 50 smaller than the cross section for the ρ meson. This is the first time the f0(980) meson has been measured in a photoproduction experiment.Received 11 November 2008DOI:https://doi.org/10.1103/PhysRevLett.102.102001©2009 American Physical Society

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