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arXiv 0807.3839nucl-ex
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γ p -> K λ反应的束反冲可观测量Ox,Oz和靶不对称性的测量

Measurement of beam-recoil observables Ox, Oz and target asymmetry for the reaction gamma p -> K Lambda

A. Lleres, O. Bartalini, JP. Bocquet, P. Calvat, M. Capogni, L. Casano, A. D'Angelo, JP. Didelez, R. DiSalvo, A. Fantini, D. Franco, C. Gaulard, G. Gervino, F. … 展开作者

A. Lleres, O. Bartalini, JP. Bocquet, P. Calvat, M. Capogni, L. Casano, A. D'Angelo, JP. Didelez, R. DiSalvo, A. Fantini, D. Franco, C. Gaulard, G. Gervino, F. Ghio, B. Girolami, A. Giusa, M. Guidal, E. Hourany, R. Kunne, V. Kuznetsov, A. Lapik, P. LeviSandri, F. Mammoliti, G. Mandaglio, D. Moricciani, AN. Mushkarenkov, V. Nedorezov, L. Nicoletti, C. Perrin, C. Randieri, D. Rebreyend, F. Renard, N. Rudnev, T. Russew, G. Russo, C. Schaerf, ML. Sperduto, MC. Sutera, A. Turinge

摘要:

双极化(束反冲)可观测量Ox和Oz已被测量的反应γ p -> K λ从阈值生产到Egamma = 1500 MeV。这些数据是用GRAAL装置的线偏振光束获得的。尽管使用非偏振目标,也可以提取目标不对称性T的值。我们的结果分析两个等压模型倾向于确认的必要性,包括新的或鲜为人知的共振在1900兆电子伏的质量区域。

英文摘要:

The double polarization (beam-recoil) observables Ox and Oz have been measured for the reaction gamma p -> K Lambda from threshold production to Egamma = 1500 MeV. The data were obtained with the linearly polarized beam of the GRAAL facility. Values for the target asymmetry T could also be extracted despite the use of an unpolarized target. Analyses of our results by two isobar models tend to confirm the necessity to include new or poorly known resonances in the 1900 MeV mass region.

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