Hadroproduction of the χ1 and χ2 states of charmonium in 800-GeV/c proton-silicon interactions
Articolo
Data di Pubblicazione:
2000
Abstract:
The cross sections for the hadroproduction of the χ1 and χ2 states of charmonium in proton-silicon collisions at √s=38.8 GeV have been measured in Fermilab fixed target experiment 771. The χ states were observed via their radiative decay to J/ψγ, where the photon converted to e+e- in the material of the spectrometer. The estimated values for the χ1 and χ2 cross sections for xF>0 are 263±69(stat)±32(syst) and 498±143(stat)±67(syst) nb per nucleon, respectively. The resulting σ(χ1)/σ(χ2) ratio of 0.53±0.20(stat) ±0.07(syst), although somewhat larger than most theoretical expectations, can be accommodated by the latest theoretical estimates. ©2000 The American Physical Society.
Tipologia CRIS:
1.1 Articolo in rivista
Elenco autori:
Alexopoulos, T.; Antoniazzi, L.; Arenton, M.; Ballagh, H. C.; Bingham, H.; Blankman, A.; Block, M.; Boden, A.; Bonomi, G.; Cao, Z. L.; Chen, T. Y.; Clark, K.; Cline, D.; Conetti, S.; Cooper, M.; Corti, G.; Cox, B.; Creti, P.; Dukes, E. C.; Durandet, C.; Elia, V.; Erwin, A. R.; Fortney, L.; Golovatyuk, V.; Gorini, E.; Grancagnolo, F.; Hagan, K.; Haire, M.; Hanlet, P.; He, M.; Introzzi, G.; Jenkins, M.; Judd, D.; Kononenko, W.; Kowald, W.; Lau, K.; Ledovskoy, A.; Liguori, G.; Lys, J.; Mazur, P. O.; Mcmanus, A. P.; Misawa, S.; Mo, G. H.; Murphy, C. T.; Nelson, K.; Pogosyan, V.; Ramachandran, S.; Rhoades, J.; Selove, W.; Smith, R. P.; Spiegel, L.; Sun, J. G.; Tokar, S.; Torre, P.; Trischuk, J.; Turnbull, L.; Wagoner, D. E.; Wang, C. R.; Wei, C.; Yang, W.; Yao, N.; Zhang, N. J.; Zou, B. T.
Link alla scheda completa:
Pubblicato in: