Photon and neutral pion production in Au+Au collisions at vsNN=130 GeV
Por:
Adams J., Adler C., Aggarwal M.M., Ahammed Z., Amonett J., Anderson B.D., Anderson M., Arkhipkin D., Averichev G.S., Badyal S.K., Balewski J., Barannikova O., Barnby L.S., Baudot J., Bekele S., Belaga V.V., Bellwied R., Berger J., Bezverkhny B.I., Bhardwaj S., Bhaskar P., Bhati A.K., Bichsel H., Billmeier A., Bland L.C., Blyth C.O., Bonner B.E., Botje M., Boucham A., Brandin A., Bravar A., Cadman R.V., Cai X.Z., Caines H., Calderón De La Barca Sánchez M., Carroll J., Castillo J., Castro M., Cebra D., Chaloupka P., Chattopadhyay S., Chen H.F., Chen Y., Chernenko S.P., Cherney M., Chikanian A., Choi B., Christie W., Coffin J.P., Cormier T.M., Cramer J.G., Crawford H.J., Das D., Das S., Derevschikov A.A., Didenko L., Dietel T., Dong X., Draper J.E., Du F., Dubey A.K., Dunin V.B., Dunlop J.C., Dutta Majumdar M.R., Eckardt V., Efimov L.G., Emelianov V., Engelage J., Eppley G., Erazmus B., Estienne M., Fachini P., Faine V., Faivre J., Fatemi R., Filimonov K., Filip P., Finch E., Fisyak Y., Flierl D., Foley K.J., Fu J., Gagliardi C.A., Ganti M.S., Gutierrez T.D., Gagunashvili N., Gans J., Gaudichet L., Germain M., Geurts F., Ghazikhanian V., Ghosh P., Gonzalez J.E., Grachov O., Grigoriev V., Gronstal S., Grosnick D., Guedon M., Guertin S.M., Gupta A., Gushin E., Hallman T.J., Hardtke D., Harris J.W., Heinz M., Henry T.W., Heppelmann S., Herston T., Hippolyte B., Hirsch A., Hjort E., Hoffmann G.W., Horsley M., Huang H.Z., Huang S.L., Humanic T.J., Igo G., Ishihara A., Jacobs P., Jacobs W.W., Janik M., Johnson I., Jones P.G., Judd E.G., Kabana S., Kaneta M., Kaplan M., Keane D., Kiryluk J., Kisiel A., Klay J., Klein S.R., Klyachko A., Koetke D.D., Kollegger T., Konstantinov A.S., Kopytine M., Kotchenda L., Kovalenko A.D., Kramer M., Kravtsov P., Krueger K., Kuhn C., Kulikov A.I., Kumar A., Kunde G.J., Kunz C.L., Kutuev R.Kh., Kuznetsov A.A., Lamont M.A.C., Landgraf J.M., Lange S., Lansdell C.P., Lasiuk B., Laue F., Lauret J., Lebedev A., Lednický R., Leontiev V.M., LeVine M.J., Li C., Li Q., Lindenbaum S.J., Lisa M.A., Liu F., Liu L., Liu Z., Liu Q.J., Ljubicic T., Llope W.J., Long H., Longacre R.S., Lopez-Noriega M., Love W.A., Ludlam T., Lynn D., Ma J., Ma Y.G., Magestro D., Mahajan S., Mangotra L.K., Mahapatra D.P., Majka R., Manweiler R., Margetis S., Markert C., Martin L., Marx J., Matis H.S., Matulenko Yu.A., McShane T.S., Meissner F., Melnick Yu., Meschanin A., Messer M., Miller M.L., Milosevich Z., Minaev N.G., Mironov C., Mishra D., Mitchell J., Mohanty B., Molnar L., Moore C.F., Mora-Corral M.J., Morozov V., De Moura M.M., Munhoz M.G., Nandi B.K., Nayak S.K., Nayak T.K., Nelson J.M., Nevski P., Nikitin V.A., Nogach L.V., Norman B., Nurushev S.B., Odyniec G., Ogawa A., Okorokov V., Oldenburg M., Olson D., Paic G., Pandey S.U., Pal S.K., Panebratsev Y., Panitkin S.Y., Pavlinov A.I., Pawlak T., Perevoztchikov V., Peryt W., Petrov V.A., Phatak S.C., Picha R., Planinic M., Pluta J., Porile N., Porter J., Poskanzer A.M., Potekhin M., Potrebenikova E., Potukuchi B.V.K.S., Prindle D., Pruneau C., Putschke J., Rai G., Rakness G., Raniwala R., Raniwala S., Ravel O., Ray R.L., Razin S.V., Reichhold D., Reid J.G., Renault G., Retiere F., Ridiger A., Ritter H.G., Roberts J.B., Rogachevski O.V., Romero J.L., Rose A., Roy C., Ruan L.J., Sahoo R., Sakrejda I., Salur S., Sandweiss J., Savin I., Schambach J., Scharenberg R.P., Schmitz N., Schroeder L.S., Schweda K., Seger J., Seliverstov D., Seyboth P., Shahaliev E., Shao M., Sharma M., Shestermanov K.E., Shimanskii S.S., Singaraju R.N., Simon F., Skoro G., Smirnov N., Snellings R., Sood G., Sorensen P., Sowinski J., Spinka H.M., Srivastava B., Stanislaus S., Stock R., Stolpovsky A., Strikhanov M., Stringfellow B., Struck C., Suaide A.A.P., Sugarbaker E., Suire C., Sumbera M., Surrow B., Symons T.J.M., Szanto De Toledo A., Szarwas P., Tai A., Takahashi J., Tang A.H., Thein D., Thomas J.H., Tikhomirov V., Tokarev M., Tonjes M.B., Trainor T.A., Trentalange S., Tribble R.E., Trivedi M.D., Trofimov V., Tsai O., Ullrich T., Underwood D.G., Van Buren G., VanderMolen A.M., Vasiliev A.N., Vasiliev M., Vigdor S.E., Viyogi Y.P., Voloshin S.A., Waggoner W., Wang F., Wang G., Wang X.L., Wang Z.M., Ward H., Watson J.W., Wells R., Westfall G.D., Whitten C., Jr., Wieman H., Willson R., Wissink S.W., Witt R., Wood J., Wu J., Xu N., Xu Z., Xu Z.Z., Yakutin A.E., Yamamoto E., Yang J., Yepes P., Yurevich V.I., Zanevski Y.V., Zborovský I., Zhang H., Zhang H.Y., Zhang W.M., Zhang Z.P., Zolnierczuk P.A., Zoulkarneev R., Zoulkarneeva J., Zubarev A.N.
Publicada:
1 ene 2004
Resumen:
We report inclusive photon measurements about midrapidity (|y|<0.5) from Au+197 Au197 collisions at ?sNN=130 GeV at RHIC. Photon pair conversions were reconstructed from electron and positron tracks measured with the Time Projection Chamber (TPC) of the STAR experiment. With this method, an energy resolution of ?E/E?2% at 0.5 GeV has been achieved. Reconstructed photons have also been used to measure the transverse momentum (pt) spectra of ?0 mesons about midrapidity (|y|<1) via the ?0? ?? decay channel. The fractional contribution of the ?0? ?? decay to the inclusive photon spectrum decreases by 20%±5% between pt=1.65 GeV/c and pt=2.4 GeV/c in the most central events, indicating that relative to ?0? ?? decay the contribution of other photon sources is substantially increasing. © 2004 The American Physical Society.
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