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arXiv 1007.1542hep-exhep-phnucl-exnucl-th
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接近阈值的$pp\to K^+Σ^+n$反应横截面

Cross section of the $pp\to K^+Σ^+n$ reaction close to threshold

A. Budzanowski, A. Chatterjee, H. Clement, E. Dorochkevitch, P. Hawranek, F. Hinterberger, R. Jahn, R. Joosten, K. Kilian, S. Kliczewski, Da. Kirillov, Di. Kiri… 展开作者

A. Budzanowski, A. Chatterjee, H. Clement, E. Dorochkevitch, P. Hawranek, F. Hinterberger, R. Jahn, R. Joosten, K. Kilian, S. Kliczewski, Da. Kirillov, Di. Kirillov, D. Kolev, M. Kravcikova, M. Lesiak, A. Magiera, H. Machner, G. Martinska, N. Piskunov, D. Protic, J. Ritman, P. von Rossen, A. Sibirtsev, I. Sitnik, R. Siudak, R. Tsenov, K. Ulbrich, J. Urban, G. J. Wagner

摘要:

我们测量了COSY Jülich上接近超子产生阈值的$pp$碰撞中$K^+$ -介子产生的包容性数据,并确定了超子-核子不变质谱.将光谱分解为三部分:$Λp$、$Σ^0p$和$Σ^+n$。发现$Σ^+n$沟道的截面远小于先前在该过剩能量区域中的测量。数据与以前的结果在较高的能量是兼容的相空间依赖。

英文摘要:

We have measured inclusive data on $K^+$-meson production in $pp$ collisions at COSY Jülich close to the hyperon production threshold and determined the hyperon-nucleon invariant mass spectra. The spectra were decomposed into three parts: $Λp$, $Σ^0p$ and $Σ^+n$. The cross section for the $Σ^+n$ channel was found to be much smaller than a previous measurement in that excess energy region. The data together with previous results at higher energies are compatible with a phase space dependence.

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。

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