Production of e+e- Pairs Accompanied by Nuclear Dissociation in Ultra-peripheral Heavy Ion Collisions [electronic resource].
- Published:
- Washington, D.C. : United States. Dept. of Energy, 2004.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy. - Physical Description:
- vp : digital, PDF file
- Additional Creators:
- Lawrence Berkeley National Laboratory, United States. Department of Energy, National Science Foundation (U.S.), and United States. Department of Energy. Office of Scientific and Technical Information
Access Online
- Restrictions on Access:
- Free-to-read Unrestricted online access
- Summary:
- We present the first data on e⁺e⁻ pair production accompanied by nuclear breakup in ultra-peripheral gold-gold collisions at a center of mass energy of 200 GeV per nucleon pair. The nuclear breakup requirement selects events at small impact parameters, where higher-order corrections to the pair production cross section should be enhanced. We compare the pair kinematic distributions with two calculations: one based on the equivalent photon approximation, and the other using lowest-order quantum electrodynamics (QED); the latter includes the photon virtuality. The cross section, pair mass, rapidity and angular distributions are in good agreement with both calculations. The pair transverse momentum, p{sub T}, spectrum agrees with the QED calculation, but not with the equivalent photon approach. We set limits on higher-order contributions to the cross section. The e⁺ and e⁻ p{sub T} spectra are similar, with no evidence for interference effects due to higher-order diagrams.
- Report Numbers:
- E 1.99:lbnl--55034
lbnl--55034 - Subject(s):
- Other Subject(s):
- Note:
- Published through SciTech Connect.
04/07/2004.
"lbnl--55034"
Physical Review C 70 FT
Harris, J.W.; Kramer, M.; Anderson, M.; Jacobs, P.; Adams, J.; Klein, S.R.; Jones, P.G.; Kaplan, M.; Adler, C.; Cramer, J.G.; Anderson, B.D.; Carroll, J.; Castro, M.; Dunlop, J.C.; Hirsch, A.; Christie, W.; Bichsel, H.; Kunz, C.L.; LeVine, M.J.; Henry, T.W.; Jacobs, W.W.; Cardenas, A.; Chen, Y.; Bonner, B.E.; Lebedev, A.; Liu, F.; Kuznetsov, A.A.; Liu, L.; Fu, J.; Crawford, H.J.; Huang, H.Z.; Li, Q.; Heinz, M.; Johnson, I.; Igo, G.; Gagliardi, C.A.; Kulikov, A.I.; Liu, Z.; Lamont, M.A.C.; Bravar, A.; Guertin, S.M.; Draper, J.E.; Chattopadhyay, S.; Keane, D.; Cadman, R.V.; Bai, Y.; Krueger, K.; Caines, H.; Eppley, G.; Fisyak, Y.; Belaga, V.V.; Erazmus, B.; Lednicky, R.; Choi, B.; Kovalenko, A.D.; Berger, J.; Hoffmann, G.W.; Gagunashvili, N.; Lange, S.; Kunde, G.J.; Coffin, J.P.; Kuhn, C.; Bland, L.C.; Cherney, M.; Humanic, T.J.; Cebra, D.; Hjort, E.; Lisa, M.A.; Bellwied, R.; Cormier, T.M.; Ivanshin, Yu.I.; Averichev, G.S.; Chikanian, A.; Ghazikhanian, V.; Corral, M.M.; Ishihara, A.; Landgraf, J.M.; Hallman, T.J.; Kisiel, A.; Eckardt, V.; Aggarwal, M.M.; Grigoriev, V.; Didenko, L.; Lauret, J.; Engelage, J.; Faivre, J.; Chernenko, S.P.; Foley, K.J.; Lindenbaum, S.J.; Derevschikov, A.A.; Grachov, O.; Fachini, P.; Judd, E.G.; Konstantinov, A.; Lasiuk, B.; Janik, M.; Blyth, C.O.; Klyachko, A.; Dunin, V.B.; Boucham, A.; Efimov, L.G.; Emelianov, V.; Deng, W.S.; Germain, M.; Heppelmann, S.; Kaneta, M.; Ahammed, Z.; Filimonov, K.; Allgower, C.; Barnby, L.S.; Billmeier, A.; Flierl, D.; Kutuev, R.K.; Barannikova, O.; Castillo, J.; Laue, F.; Balewski, J.; Klay, J.; Hardtke, D.; Gushin, E.; Baudot, J.; Leontiev, V.M.; Geurts, F.; Fatemi, R.; Calderon de la Barca Sanchez, M.; Amonett, J.; Bekele, S.; Brandin, A.; Chaloupka, P.; Dietel, T.; Faine, V.; Finch, E.; Gans, J.; Gaudichet, L.; Guedon, M.; Herston, T.; Hippolyte, B.; Horsley, M.; Kiryluk, J.; Kotchenda, L.; Kravtsov, P.; Lansdell, C.P.; Kollegger, T.; Kopytine, S.M.; Arkhipkin, D. - Funding Information:
- AC03-76SF00098
NRNC
View MARC record | catkey: 14451282