ρ[superscript 0] photoproduction in AuAu collisions at √sNN=62.4 GeV measured with the STAR detector
Citable URI:
http://hdl.handle.net/1721.1/72103
| Title: | ρ[superscript 0] photoproduction in AuAu collisions at √sNN=62.4 GeV measured with the STAR detector |
| Author: | Agakishiev, G.; Aggarwal, M. M.; Ahammed, Z.; Alakhverdyants, A. V.; Alekseev, I.; Alford, J.; Anderson, B. D.; Anson, C. D.; Arkhipkin, D.; Averichev, G. S.; Balewski, J.; Beavis, D. R.; Behera, N. K.; Bellwied, R.; Betancourt, M. J.; Betts, R. R.; Bhasin, A.; Bhati, A. K.; Bichsel, H.; Bielcik, J.; Bielcikova, J.; Bland, L. C.; Bordyuzhin, I. G.; Borowski, W.; Bouchet, J.; Braidot, E.; Brandin, A. V.; Bridgeman, A.; Brovko, S. G.; Bruna, E. ... [more in full view] |
| Department: | Massachusetts Institute of Technology. Laboratory for Nuclear Science; Massachusetts Institute of Technology. Dept. of Physics |
| Publisher: | American Physical Society |
| Issue Date: | 2012-01 |
| Abstract: | Vector mesons may be photoproduced in relativistic heavy-ion collisions when a virtual photon emitted by one nucleus scatters from the other nucleus, emerging as a vector meson. The STAR Collaboration has previously presented measurements of coherent ρ[superscript 0] photoproduction at center of mass energies of 130 GeV and 200 GeV in AuAu collisions. Here, we present a measurement of the cross section at 62.4 GeV; we find that the cross section for coherent ρ[superscript 0] photoproduction with nuclear breakup is 10.5±1.5±1.6 mb at 62.4 GeV. The cross-section ratio between 200 GeV and 62.4 GeV is 4.4±0.6, less than is predicted by most theoretical models. It is, however, proportionally much larger than the previously observed 15%±55% increase between 130 GeV and 200 GeV. |
| URI: | http://hdl.handle.net/1721.1/72103 |
| ISSN: | 0556-2813 1089-490X |
| Citation: | ©2012 American Physical Society |
| Version: | Final published version |
| Terms of Use: | Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. |
| Published as: | http://dx.doi.org/10.1103/PhysRevC.85.014910 |
| Journal: | Physical Review C |
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