质子-质子诱导π⁰π⁰产生中的ΔΔ激发
核实验
2011-01-27 v1
摘要
在CELSIUS/WASA上，从阈值到T_p = 1.3 GeV的能量范围内，对pp → ppπ⁰π⁰反应进行了独占测量。获得了总截面和微分截面。这里我们关注T_p ≥ 1 GeV的能量，此时ΔΔ激发成为主导过程。没有发现超出传统t-道ΔΔ激发所给出的显著ABC效应的证据。这也适用于双π融合到准束缚态²He的情况。将数据与基于π和ρ交换的模型预测进行了比较。总截面和微分截面与这些预测不一致，需要对ρ交换进行深刻修改。允许仅小ρ交换贡献的现象学修改导致了对数据的定量描述。
引用
@article{arxiv.1007.0405,
title = {Delta Delta Excitation in Proton-Proton Induced pi0pi0 Production},
author = {T. Skorodko and M. Bashkanov and D. Bogoslawsky and H. Calen and H. Clement and E. Doroshkevich and L. Demiroers and C. Ekstroem and K. Fransson and L. Gustafsson and B. Hoistad and G. Ivanov and M. Jacewicz and E. Jiganov and T. Johansson and O. Khakimova and S. Keleta and I. Koch and F. Kren and S. Kullander and A. Kupsc and P. Marciniewski and R. Meier and B. Morosov and C. Pauly and H. Petren and Y. Petukhov and A. Povtorejko and R. J. M. Y. Ruber and K. Schoenning and W. Scobel and B. Shwartz and J. Stepaniak and P. Thoerngren-Engblom and V. Tikhomirov and G. J. Wagner and M. Wolke and A. Yamamoto and J. Zabierowski and J. Zlomanczuk},
journal= {arXiv preprint arXiv:1007.0405},
year = {2011}
}