Baryon rapidity loss in relativistic Au + Au collisions.

/ Authors

Ho D Seweryniak, P. Woods, J. Ressler, C. Davids, A. Heinz, A. Sonzogni, J. Uusitalo, W. Walters, J. Caggiano, M. Carpenter

and 116 more authors

J. Cizewski, T. Davinson, K. Ding, N. Fotiades, U. Garg, R. Janssens, T. Khoo, F. Kondev, T. Lauritsen, C. Lister, P. Reiter, J. Shergur, I. Wiedenhöver, Baryon Rapidity Loss, R. Au, Au Collisions, B. Back, R. Betts, J. Chang, W. Chang, C. Chi, Y. Y. Chu, J. Cumming, J. Dunlop, W. Eldredge, S. Fung, R. Ganz, E. Garcia, A. Gillitzer, G. Heintzelman, W. Henning, D. Hofman, B. Holzman, J. Kang, E. Kim, S. Y. Kim, Y. Kwon, D. Mcleod, A. Mignerey, M. Moulson, V. Nanal, C. Ogilvie, R. Pak, A. Ruangma, D. Russ, R. Seto, P. Stanskas, G. Stephans, H. Wang, F. Wolfs, A. Wuosmaa, H. Xiang, G. Xu, H. Yao, C. Zou, A. Korichi, A. Wilson, F. Hannachi, A. Lopez-Martens, M. Rejmund, C. Schück, C. Vieu, G. Chmel, A. Görgen, H. Hübel, D. Rossbach, S. Schönwasser, M. Bergström, B. Nyakó, J. Timár, D. Bazzacco, S. Lunardi, C. Rossi-Alvarez, P. Bednarczyk, N. Kintz, S. Naguleswaran, A. Astier, D. Cullen, J. Sharpey-Schafer, R. Wadsworth, B. Davids, D. Anthony, T. Aumann, S. Austin, T. Baumann, Dominique Bazin, R. Clement, H. Esbensen, P. Lofy, T. Nakamura, B. Sherrill, J. Yurkon, S. Bhattacharyya, P. J. Daly, C. T. Zhang, Z. Grabowski, S. Saha, R. Broda, B. Fornal, I. Ahmad, D. Seweryniak, J. Blomqvist, J. Banar, J. A. Becker, D. Gemmell, A. Kraemer, A. Mashayekhi, D. McNabb, G. Miller, E. Moore, L. Pangault, R. Rundberg, J. Schiffer, S. Shastri, T. Wang, J. Wilhelmy

/ Abstract

An excitation function of proton rapidity distributions for different centralities is reported from AGS Experiment E917 for Au+Au collisions at 6, 8, and 10.8 GeV/nucleon. The rapidity distributions from peripheral collisions have a valley at midrapidity which smoothly change to distributions that display a broad peak at midrapidity for central collisions. The mean rapidity loss increases with increasing beam energy, whereas the fraction of protons consistent with isotropic emission from a stationary source at midrapidity decreases with increasing beam energy. The data suggest that the stopping is substantially less than complete at these energies.

Journal: Physical review letters

DOI: 10.1103/PhysRevLett.86.1970