arXiv 0806.16012008-06hep-ph

Reggeon交易所内反应$πN\to two mesons + N$的分析。1.拟合和结果

The analysis of reactions $πN\to two mesons + N$ within reggeon exchanges. 1. Fit and results

V. V. Anisovich, A. V. Sarantsev

备注：: 43 pages, 24 figures, some misprints correctted

摘要：

这种分析的新颖之处是直接使用Reggeon交换技术来描述初始π介子的大能量下的反应$πN\to two mesons + N$。这种方法使我们能够同时描述分布在$M$（两个介子不变质量）和$t$（动量转移平方核子）。利用该技术，研究了在$πN\to π^0π^0 N$反应中产生的以下共振（以及相应的裸态）：$f_0(980)$、$f_0(1300)$、$f_0(1200-1600)$、$f_0(1500)$、$f_0(1750)$、$f_2(1270)$、$f_2(1525)$、$f_2(1565)$、$f_2(2020)$、$f_4(2025)$。加入反应$p\bar p({\rm at rest, from liquid H_2})\to π^0π^0π^0$，$π^0π^0η$，$π^0ηη$和$p\bar p({\rm at rest, from gaseous H_2})\to π^0π^0π^0$，$π^0π^0η$，$π^0ηη$的数据，我们对所有这些反应的双介子谱进行了同时的$K$ -矩阵拟合。结合适合上述列出的isoscope $f_J$ -状态和isovector的，$a_0(980)$，$a_0(1475)$，$a_2(1320)$，的结果。

英文摘要：

The novel point of this analysis is a direct use of reggeon exchange technique for the description of the reactions $πN\to two mesons + N$ at large energies of the initial pion. This approach allows us to describe simultaneously distributions over $M$ (invariant mass of two mesons) and $t$ (momentum transfer squared to nucleons). Making use of this technique, the following resonances (as well as corresponding bare states), produced in the $πN\to π^0π^0 N$ reaction are studied: $f_0(980)$, $f_0(1300)$, $f_0(1200-1600)$, $f_0(1500)$, $f_0(1750)$, $f_2(1270)$, $f_2(1525)$, $f_2(1565)$, $f_2(2020)$, $f_4(2025)$. Adding data for the reactions $p\bar p({\rm at rest, from liquid H_2})\to π^0π^0π^0$, $π^0π^0η$, $π^0ηη$ and $p\bar p({\rm at rest, from gaseous H_2})\to π^0π^0π^0$, $π^0π^0η$, $π^0ηη$, we have performed simultaneous $K$-matrix fits of two-meson spectra in all these reactions. The results of combined fits to the above-listed isoscalar $f_J$-states and to isovector ones, $a_0(980)$, $a_0(1475)$, $a_2(1320)$, are presented.

机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。

摘要：

英文摘要：

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