质子上直接f0(980)光生反应的测量。
Measurement of direct f0(980) photoproduction on the proton.
作者信息
Battaglieri M, De Vita R, Szczepaniak A P, Adhikari K P, Aghasyan M, Amaryan M J, Ambrozewicz P, Anghinolfi M, Asryan G, Avakian H, Bagdasaryan H, Baillie N, Ball J P, Baltzell N A, Batourine V, Bedlinskiy I, Bellis M, Benmouna N, Berman B L, Bibrzycki L, Biselli A S, Bookwalter C, Bouchigny S, Boiarinov S, Bradford R, Branford D, Briscoe W J, Brooks W K, Bültmann S, Burkert V D, Calarco J R, Careccia S L, Carman D S, Casey L, Chen S, Cheng L, Clinton E, Cole P L, Collins P, Crabb D, Crannell H, Crede V, Cummings J P, Dale D, Daniel A, Dashyan N, De Masi R, De Sanctis E, Degtyarenko P V, Deur A, Dhamija S, Dharmawardane K V, Dickson R, Djalali C, Dodge G E, Donnelly J, Doughty D, Dugger M, Dzyubak O P, Egiyan H, Egiyan K S, El Fassi L, Elouadrhiri L, Eugenio P, Fedotov G, Fersch R, Forest T A, Fradi A, Gabrielyan M Y, Gan L, Garçon M, Gasparian A, Gavalian G, Gevorgyan N, Gilfoyle G P, Giovanetti K L, Girod F X, Glamazdin O, Goett J, Goetz J T, Gohn W, Golovatch E, Gordon C I O, Gothe R W, Graham L, Griffioen K A, Guidal M, Guler N, Guo L, Gyurjyan V, Hadjidakis C, Hafidi K, Hakobyan H, Hakobyan R S, Hanretty C, Hardie J, Hassall N, Heddle D, Hersman F W, Hicks K, Hleiqawi I, Holtrop M, Hyde C E, Ilieva Y, Ireland D G, Ishkhanov B S, Isupov E L, Ito M M, Jenkins D, Jo H S, Johnstone J R, Joo K, Juengst H G, Kageya T, Kalantarians N, Keller D, Kellie J D, Khandaker M, Khetarpal P, Kim W, Klein A, Klein F J, Klimenko A V, Konczykowski P, Kossov M, Krahn Z, Kramer L H, Kubarovsky V, Kuhn J, Kuhn S E, Kuleshov S V, Kuznetsov V, Lachniet J, Laget J M, Langheinrich J, Lawrence D, Lee T, Lesniak L, Li Ji, Livingston K, Lowry M, Lu H Y, Maccormick M, Malace S, Markov N, Mattione P, McCracken M E, McKinnon B, Mecking B A, Melone J J, Mestayer M D, Meyer C A, Mibe T, Mikhailov K, Mineeva T, Minehart R, Mirazita M, Miskimen R, Mochalov V, Mokeev V, Moreno B, Moriya K, Morrow S A, Moteabbed M, Munevar E, Mutchler G S, Nadel-Turonski P, Nakagawa I, Nasseripour R, Niccolai S, Niculescu G, Niculescu I, Niczyporuk B B, Niroula M R, Niyazov R A, Nozar M, Osipenko M, Ostrovidov A I, Park K, Park S, Pasyuk E, Paris M, Paterson C, Pereira S Anefalos, Pierce J, Pivnyuk N, Pocanic D, Pogorelko O, Pozdniakov S, Price J W, Prok Y, Protopopescu D, Raue B A, Riccardi G, Ricco G, Ripani M, Ritchie B G, Rosner G, Rossi P, Sabatié F, Saini M S, Salamanca J, Salgado C, Sandorfi A, Santoro J P, Sapunenko V, Schott D, Schumacher R A, Serov V S, Sharabian Y G, Sharov D, Shvedunov N V, Smith E S, Smith L C, Sober D I, Sokhan D, Starostin A, Stavinsky A, Stepanyan S, Stepanyan S S, Stokes B E, Stoler P, Stopani K A, Strakovsky I I, Strauch S, Taiuti M, Tedeschi D J, Teymurazyan A, Tkabladze A, Tkachenko S, Todor L, Tur C, Ungaro M, Vineyard M F, Vlassov A V, Watts D P, Wei X, Weinstein L B, Weygand D P, Williams M, Wolin E, Wood M H, Yegneswaran A, Yurov M, Zana L, Zhang J, Zhao B, Zhao Z W
机构信息
Istituto Nazionale di Fisica Nucleare, Sezione di Genova, 16146 Genova, Italy.
出版信息
Phys Rev Lett. 2009 Mar 13;102(10):102001. doi: 10.1103/PhysRevLett.102.102001. Epub 2009 Mar 11.
We report on the results of the first measurement of exclusive f_{0}(980) meson photoproduction on protons for E_{gamma}=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 pi;{+}pi;{-} channel by performing a partial wave analysis of the reaction gammap-->ppi;{+}pi;{-}. Clear evidence of the f_{0}(980) meson was found in the interference between P and S waves at M_{pi;{+}pi;{-}} approximately 1 GeV. The S-wave differential cross section integrated in the mass range of the f_{0}(980) was found to be a factor of about 50 smaller than the cross section for the rho meson. This is the first time the f_{0}(980) meson has been measured in a photoproduction experiment.
我们报告了在托马斯·杰斐逊国家加速器设施中，使用CLAS探测器，针对能量Eγ = 3.0 - 3.8 GeV以及-t = 0.4 - 1.0 GeV²的情况，对质子上的专属f₀(980)介子光生反应进行首次测量的结果。通过对反应γp→π⁺π⁻进行分波分析，在π⁺π⁻通道中探测到该共振态通过其衰变产生。在Mπ⁺π⁻约为1 GeV时，在P波和S波的干涉中发现了f₀(980)介子的清晰证据。发现在f₀(980)质量范围内积分得到的S波微分截面比ρ介子的截面小约50倍。这是首次在光生反应实验中测量f₀(980)介子。
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