Observation of pi(+)pi(-)pi(+)pi(-) photoproduction in ultraperipheral heavy-ion collisions at root s(NN)=200 GeV at the STAR detector
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Title |
Observation of pi(+)pi(-)pi(+)pi(-) photoproduction in ultraperipheral heavy-ion collisions at root s(NN)=200 GeV at the STAR detector
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Creator |
ABELEV, BI
AGGARWAL, MM AHAMMED, Z ALAKHVERDYANTS, AV ANDERSON, BD ARKHIPKIN, D AVERICHEV, GS BALEWSKI, J BARNBY, LS BAUMGART, S BEAVIS, DR GREBENYUK, O GROSNICK, D GRUBE, B GUERTIN, SM GUPTA, A GUPTA, N GURYN, W HAAG, B HALLMAN, TJ HAMED, A BELLWIED, R HAN, LX HARRIS, JW HAYS-WEHLE, JP HEINZ, M HEPPELMANN, S HIRSCH, A HJORT, E HOFFMAN, AM HOFFMANN, GW HOFMAN, DJ BENEDOSSO, F HOLLIS, RS HUANG, HZ HUMANIC, TJ HUO, L IGO, G IORDANOVA, A JACOBS, P JACOBS, WW JAKL, P JENA, C BETANCOURT, MJ JIN, F JONES, CL JONES, PG JOSEPH, J JUDD, EG KABANA, S KAJIMOTO, K KANG, K KAPITAN, J KAUDER, K BETTS, RR KEANE, D KECHECHYAN, A KETTLER, D KIKOLA, DP KIRYLUK, J KISIEL, A KLEIN, SR KNOSPE, AG KOCOLOSKI, A KOETKE, DD BHASIN, A KOLLEGGER, T KONZER, J KOPYTINE, M KORALT, I KORSCH, W KOTCHENDA, L KOUCHPIL, V KRAVTSOV, P KRUEGER, K KRUS, M BHATI, AK KUMAR, L KURNADI, P LAMONT, MAC LANDGRAF, JM LAPOINTE, S LAURET, J LEBEDEV, A LEDNICKY, R LEE, CH LEE, JH BICHSEL, H LEIGHT, W LEVINE, MJ LI, C LI, L LI, N LI, W LI, X LI, X LI, Y LI, Z BIELCIK, J LIN, G LINDENBAUM, SJ LISA, MA LIU, F LIU, H LIU, J LJUBICIC, T LLOPE, WJ LONGACRE, RS LOVE, WA BIELCIKOVA, J LU, Y MA, GL MA, YG MAHAPATRA, DP MAJKA, R MALL, OI MANGOTRA, LK MANWEILER, R MARGETIS, S MARKERT, C BIRITZ, B MASUI, H MATIS, HS MATULENKO, YA MCDONALD, D MCSHANE, TS MESCHANIN, A MILNER, R MINAEV, NG MIODUSZEWSKI, S MISCHKE, A BLAND, LC MITROVSKI, MK MOHANTY, B MONDAL, MM MOROZOV, DA MUNHOZ, MG NANDI, BK NATTRASS, C NAYAK, TK NELSON, JM NETRAKANTI, PK BONNER, BE NG, MJ NOGACH, LV NURUSHEV, SB ODYNIEC, G OGAWA, A OKADA, H OKOROKOV, V OLSON, D PACHR, M PAGE, BS BOUCHET, J PAL, SK PANDIT, Y PANEBRATSEV, Y PAWLAK, T PEITZMANN, T PEREVOZTCHIKOV, V PERKINS, C PERYT, W PHATAK, SC PILE, P BRAIDOT, E PLANINIC, M PLOSKON, MA PLUTA, J PLYKU, D POLJAK, N POSKANZER, AM POTUKUCHI, BVKS POWELL, CB PRINDLE, D PRUNEAU, C BRANDIN, AV PRUTHI, NK PUJAHARI, PR PUTSCHKE, J RANIWALA, R RANIWALA, S RAY, RL REDWINE, R REED, R REHBERG, JM RITTER, HG BRIDGEMAN, A ROBERTS, JB ROGACHEVSKIY, OV ROMERO, JL ROSE, A ROY, C RUAN, L RUSSCHER, MJ SAHOO, R SAKAI, S SAKREJDA, I BRUNA, E SAKUMA, T SALUR, S SANDWEISS, J SANGALINE, E SCHAMBACH, J SCHARENBERG, RP SCHMITZ, N SCHUSTER, TR SEELE, J SEGER, J BUELTMANN, S SELYUZHENKOV, I SEYBOTH, P SHAHALIEV, E SHAO, M SHARMA, M SHI, SS SICHTERMANN, EP SIMON, F SINGARAJU, RN SKOBY, MJ BUNZAROV, I SMIRNOV, N SORENSEN, P SOWINSKI, J SPINKA, HM SRIVASTAVA, B STANISLAUS, TDS STASZAK, D STEVENS, JR STOCK, R STRIKHANOV, M BURTON, TP STRINGFELLOW, B SUAIDE, AAP SUAREZ, MC SUBBA, NL SUMBERA, M SUN, XM SUN, Y SUN, Z SURROW, B SYMONS, TJM CAI, XZ DE TOLEDO, AS TAKAHASHI, J TANG, AH TANG, Z TARINI, LH TARNOWSKY, T THEIN, D THOMAS, JH TIAN, J TIMMINS, AR CAINES, H TIMOSHENKO, S TLUSTY, D TOKAREV, M TRAINOR, TA TRAM, VN TRENTALANGE, S TRIBBLE, RE TSAI, OD ULERY, J ULLRICH, T SANCHEZ, MCD UNDERWOOD, DG VAN BUREN, G VAN NIEUWENHUIZEN, G VANFOSSEN, JA VARMA, R VASCONCELOS, GMS VASILIEV, AN VIDEBAEK, F VIYOGI, YP VOKAL, S CATU, O VOLOSHIN, SA WADA, M WALKER, M WANG, F WANG, G WANG, H WANG, JS WANG, Q WANG, X WANG, XL CEBRA, D WANG, Y WEBB, G WEBB, JC WESTFALL, GD WHITTEN, C WIEMAN, H WINGFIELD, E WISSINK, SW WITT, R WU, Y CENDEJAS, R XIE, W XU, N XU, QH XU, W XU, Y XU, Z XUE, L YANG, Y YEPES, P YIP, K CERVANTES, MC YOO, IK YUE, Q ZAWISZA, M ZBROSZCZYK, H ZHAN, W ZHANG, S ZHANG, WM ZHANG, XP ZHANG, Y ZHANG, ZP CHAJECKI, Z ZHAO, J ZHONG, C ZHOU, J ZHOU, W ZHU, X ZHU, YH ZOULKARNEEV, R ZOULKARNEEVA, Y CHALOUPKA, P CHATTOPADHYAY, S CHEN, HF CHEN, JH CHEN, JY CHENG, J CHERNEY, M CHIKANIAN, A CHOI, KE CHRISTIE, W CHUNG, P CHUNG, SU CLARKE, RF CODRINGTON, MJM CORLISS, R CRAMER, JG CRAWFORD, HJ DAS, D DASH, S LEYVA, AD DE SILVA, LC DEBBE, RR DEDOVICH, TG DEPHILLIPS, M DEREVSCHIKOV, AA DE SOUZA, RD DIDENKO, L DJAWOTHO, P DOGRA, SM DONG, X DRACHENBERG, JL DRAPER, JE DUNLOP, JC MAZUMDAR, MRD EFIMOV, LG ELHALHULI, E ELNIMR, M ENGELAGE, J EPPLEY, G ERAZMUS, B ESTIENNE, M EUN, L EVDOKIMOV, O FACHINI, P FATEMI, R FEDORISIN, J FERSCH, RG FILIP, P FINCH, E FINE, V FISYAK, Y GAGLIARDI, CA GANGADHARAN, DR GANTI, MS GARCIA-SOLIS, EJ GEROMITSOS, A GEURTS, F GHAZIKHANIAN, V GHOSH, P GORBUNOV, YN GORDON, A |
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Subject |
helicity-coupling amplitudes
time projection chamber gamma-gamma photon physics mass quarkonia |
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Description |
We present a measurement of pi(+)pi(-)pi(+)pi(-) photonuclear production in ultraperipheral Au-Au collisions at root s(NN) = 200 GeV from the STAR experiment. The pi(+)pi(-)pi(+)pi(-) final states are observed at low transverse momentum and are accompanied by mutual nuclear excitation of the beam particles. The strong enhancement of the production cross section at low transverse momentum is consistent with coherent photoproduction. The pi(+)pi(-)pi(+)pi(-) invariant mass spectrum of the coherent events exhibits a broad peak around 1540 +/- 40 MeV/c(2) with a width of 570 +/- 60 MeV/c(2), in agreement with the photoproduction data for the rho(0)(1700). We do not observe a corresponding peak in the pi(+)pi(-) final state and measure an upper limit for the ratio of the branching fractions of the rho(0)(1700) to pi(+)pi(-) and pi(+)pi(-)pi(+)pi(-) of 2.5% at 90% confidence level. The ratio of rho(0)(1700) and rho(0)(770) coherent production cross sections is measured to be 13.4 +/- 0.8(stat.) +/- 4.4(syst.)%.
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Publisher |
AMER PHYSICAL SOC
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Date |
2011-11-06T23:03:46Z
2011-12-26T13:00:32Z 2011-12-27T05:40:48Z 2011-11-06T23:03:46Z 2011-12-26T13:00:32Z 2011-12-27T05:40:48Z 2010 |
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Type |
Article
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Identifier |
PHYSICAL REVIEW C, 81(4)
0556-2813 http://dx.doi.org/10.1103/PhysRevC.81.044901 http://dspace.library.iitb.ac.in/xmlui/handle/10054/16522 http://hdl.handle.net/10054/16522 |
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Language |
en
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