Observation of Two-Source Interference in the Photoproduction Reaction AuAu-->AuAu rho

Abelev, B.; Aggarwal, M.; Ahammed, Z.; Anderson, B.; Arkhipkin, D.; Averichev, G.; Bai, Y.; Balewski, J.; Barannikova, O.; Barnby, L.; Baudot, J.; Baumgart, S.; Beavis, D.; Bellwied, R.; Benedosso, F.; Betancourt, M.; Betts, R.; Bhardwaj, S.; Bhasin, A.; Bhati, A.; Bichsel, H.; Bielcik, J.; Bielcikova, J.; Biritz, B.; Bland, L.; Bombara, M.; Bonner, B.; Botje, M.; Bouchet, J.; Braidot, E.; Brandin, A.; Bruna, E.; Bueltmann, S.; Burton, T.; Bystersky, M.; Cai, X.; Caines, H.; Calderón de la Barca Sánchez, M.; Callner, J.; Catu, O.; Cebra, D.; Cendejas, R.; Cervantes, M.; Chajecki, Z.; Chaloupka, P.; Chattopadhyay, S.; Chen, H.; Chen, J.; Chen, J.; Cheng, J.; Cherney, M.; Chikanian, A.; Choi, K.; Christie, W.; Chung, S.; Clarke, R.; Codrington, M.; Coffin, J.; Corliss, R.; Cormier, T.; Cosentino, M.; Cramer, J.; Crawford, H.; Das, D.; Dash, S.; Daugherity, M.; De Silva, C.; Dedovich, T.; DePhillips, M.; Derevschikov, A.; Derradi de Souza, R.; Didenko, L.; Djawotho, P.; Dogra, S.; Dong, X.; Drachenberg, J.; Draper, J.; Du, F.; Dunlop, J.; Dutta Mazumdar, M.; Edwards, W.; Efimov, L.; Elhalhuli, E.; Elnimr, M.; Emelianov, V.; Engelage, J.; Eppley, G.; Erazmus, B.; Estienne, M.; Eun, L.; Fachini, P.; Fatemi, R.; Fedorisin, J.; Feng, A.; Filip, P.; Finch, E.; Fine, V.; Fisyak, Y.; Gagliardi, C.; Gaillard, L.; Gangadharan, D.; Ganti, M.; Garcia-Solis, E.; Ghazikhanian, V.; Ghosh, P.; Gorbunov, Y.; Gordon, A.; Grebenyuk, O.; Grosnick, D.; Grube, B.; Guertin, S.; Guimaraes, K.; Gupta, A.; Gupta, N.; Guryn, W.; Haag, B.; Hallman, T.; Hamed, A.; Harris, J.; He, W.; Heinz, M.; Heppelmann, S.; Hippolyte, B.; Hirsch, A.; Hjort, E.; Hoffman, A.; Hoffmann, G.; Hofman, D.; Hollis, R.; Huang, H.; Humanic, T.; Igo, G.; Iordanova, A.; Jacobs, P.; Jacobs, W.; Jakl, P.; Jin, F.; Jones, C.; Jones, P.; Joseph, J.; Judd, E.; Kabana, S.; Kajimoto, K.; Kang, K.; Kapitan, J.; Kaplan, M.; Keane, D.; Kechechyan, A.; Kettler, D.; Khodyrev, V.; Kikola, D.; Kiryluk, J.; Kisiel, A.; Klein, S.; Knospe, A.; Kocoloski, A.; Koetke, D.; Kopytine, M.; Kotchenda, L.; Kouchpil, V.; Kravtsov, P.; Kravtsov, V.; Krueger, K.; Krus, M.; Kuhn, C.; Kumar, L.; Kurnadi, P.; Lamont, M.; Landgraf, J.; LaPointe, S.; Lauret, J.; Lebedev, A.; Lednicky, R.; Lee, C-H.; Leight, W.; LeVine, M.; Li, C.; Li, N.; Li, Y.; Lin, G.; Lindenbaum, S.; Lisa, M.; Liu, F.; Liu, H.; Liu, J.; Liu, L.; Ljubicic, T.; Llope, W.; Longacre, R.; Love, W.; Lu, Y.; Ludlam, T.; Lynn, D.; Ma, G.; Ma, Y.; Mahapatra, D.; Majka, R.; Mall, O.; Mangotra, L.; Manweiler, R.; Margetis, S.; Markert, C.; Matis, H.; Matulenko, Yu.; McShane, T.; Meschanin, A.; Milner, R.; Minaev, N.; Mioduszewski, S.; Mischke, A.; Mitchell, J.; Mohanty, B.; Morozov, D.; Munhoz, M.; Nandi, B.; Nattrass, C.; Nayak, T.; Nelson, J.; Nepali, C.; Netrakanti, P.; Ng, M.; Nogach, L.; Nurushev, S.; Odyniec, G.; Ogawa, A.; Okada, H.; Okorokov, V.; Olson, D.; Pachr, M.; Page, B.; Pal, S.; Pandit, Y.; Panebratsev, Y.; Pawlak, T.; Peitzmann, T.; Perevoztchikov, V.; Perkins, C.; Peryt, W.; Phatak, S.; Planinic, M.; Pluta, J.; Poljak, N.; Poskanzer, A.; Potukuchi, B.; Prindle, D.; Pruneau, C.; Pruthi, N.; Putschke, J.; Raniwala, R.; Raniwala, S.; Ray, R.; Redwine, R.; Reed, R.; Ridiger, A.; Ritter, H.; Roberts, J.; Rogachevskiy, O.; Romero, J.; Rose, A.; Roy, C.; Ruan, L.; Russcher, M.; Rykov, V.; Sahoo, R.; Sakrejda, I.; Sakuma, T.; Salur, S.; Sandweiss, J.; Sarsour, M.; Schambach, J.; Scharenberg, R.; Schmitz, N.; Seger, J.; Selyuzhenkov, I.; Seyboth, P.; Shabetai, A.; Shahaliev, E.; Shao, M.; Sharma, M.; Shi, S.; Shi, X-H.; Sichtermann, E.; Simon, F.; Singaraju, R.; Skoby, M.; Smirnov, N.; Snellings, R.; Sorensen, P.; Sowinski, J.; Spinka, H.; Srivastava, B.; Stadnik, A.; Stanislaus, T.; Staszak, D.; Strikhanov, M.; Stringfellow, B.; Suaide, A.; Suarez, M.; Subba, N.; Sumbera, M.; Sun, X.; Sun, Y.; Sun, Z.; Surrow, B.; Symons, T.; Szanto de Toledo, A.; Takahashi, J.; Tang, A.; Tang, Z.; Tarnowsky, T.; Thein, D.; Thomas, J.; Tian, J.; Timmins, A.; Timoshenko, S.; Tlusty, D.; Tokarev, M.; Trainor, T.; Tram, V.; Trattner, A.; Trentalange, S.; Tribble, R.; Tsai, O.; Ulery, J.; Ullrich, T.; Underwood, D.; Van Buren, G.; van Leeuwen, M.; Vander Molen, A.; Vanfossen, J.; Varma, R.; Vasconcelos, G.; Vasilevski, I.; Vasiliev, A.; Videbaek, F.; Vigdor, S.; Viyogi, Y.; Vokal, S.; Voloshin, S.; Wada, M.; Waggoner, W.; Walker, M.; Wang, F.; Wang, G.; Wang, J.; Wang, Q.; Wang, X.; Wang, X.; Wang, Y.; Webb, J.; Westfall, G.; Whitten, C.; Wieman, H.; Wissink, S.; Witt, R.; Wu, Y.; Xie, W.; Xu, N.; Xu, Q.; Xu, Y.; Xu, Z.; Yepes, P.; Yoo, I-K.; Yue, Q.; Zawisza, M.; Zbroszczyk, H.; Zhan, W.; Zhang, H.; Zhang, S.; Zhang, W.; Zhang, Y.; Zhang, Z.; Zhao, Y.; Zhong, C.; Zhou, J.; Zoulkarneev, R.; Zoulkarneeva, Y.; Zuo, J.

Author(s)

Walker, M.; Surrow, Bernd; Sakuma, Tai; Redwine, Robert P.; Milner, Richard G.; ... Show more

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Abstract

In ultraperipheral relativistic heavy-ion collisions, a photon from the electromagnetic field of one nucleus can fluctuate to a quark-antiquark pair and scatter from the other nucleus, emerging as a ρ[superscript 0]. The ρ[superscript 0] production occurs in two well-separated (median impact parameters of 20 and 40 F for the cases considered here) nuclei, so the system forms a two-source interferometer. At low transverse momenta, the two amplitudes interfere destructively, suppressing ρ[superscript 0] production. Since the ρ[superscript 0] decays before the production amplitudes from the two sources can overlap, the two-pion system can only be described with an entangled nonlocal wave function, and is thus an example of the Einstein-Podolsky-Rosen paradox. We observe this suppression in 200 GeV per nucleon-pair gold-gold collisions. The interference is 87%±5%(stat.)±8%(syst.) of the expected level. This translates into a limit on decoherence due to wave function collapse or other factors of 23% at the 90% confidence level.

Date issued

2009-03

URI

http://hdl.handle.net/1721.1/51784

Department

Massachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Laboratory for Nuclear Science

Journal

Physical Review Letters

Publisher

American Physical Society

Citation

Version: Final published version

ISSN

0031-9007

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