First observation of the $\Xi^- \pi^+$ decay mode of the $\Xi^0(1690)$ hyperon
First observation of the
$\Xi^- \pi^+$ decay mode of the
$\Xi^0(1690)$ hyperon
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首次观察 $Xi^- pi^ $ 超子的 $Xi^0(1690)$ 衰变模式
DOI：
10.1007/s100529800902
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发表时间：
1998
期刊：
影响因子：
--
通讯作者：
WA98 Collaboration
中科院分区：
文献类型：
--
作者：
M. I. Adamovich et al.;WA98 Collaboration
我们首次观测到了π 0（1690）的π − π+散射模式，证实了这种共振的存在。1690年的1690是由345 GeV/c的平均动量的铜和碳靶产生的。其质量和宽度接近于先前在ΛK−衰变通道中观测到的<$−（1690）。包含的生产截面和分支比的乘积是相对于1530给出的。a现就职于加拿大不列颠哥伦比亚省温哥华市TRIUMF V6 T 2A 3 B在俄罗斯莫斯科州立大学请假c现就职于FNAL，PO Box 500 Batavia，IL 60510，USA。d现就职于Fraunhofer Inst. für Solar Energiesysteme，D-79100弗赖堡，德国e现就职于Fakultät für Physik，弗赖堡大学，德国f现就职于日本东京大学宇宙射线研究所g现就职于托马斯Jefferson Lab，纽波特纽斯，VA 23606，USA h爱爱荷华州大学，爱荷爱荷华州城，IA 52242，USA i现就职于慕尼黑工业大学，Garching，德国j NIKEF，1009 DB Amsterdam，The Netherlands k supported by the UK PPARC l supported by the Bundesministerium für Bildung，Wissenschaft，Forschung und Technologie，德国国，under contract number 05 5HD 15 I，06 HD 524 I and 06 MZ 5265
We report the first observation of the Ξ− π+ scattering mode of the Ξ0 (1690), confirming the existence of this resonance. The Ξ0 (1690) were produced by Σ− of 345 GeV/c mean momentum of copper and carbon targets. The mass and width are close to those observed earlier for the Ξ−(1690) in the ΛK− decay channel. The product of inclusive production cross section and branching ratio is given relative to that of the Ξ0 (1530). a Now at TRIUMF, Vancouver, BC, Canada V6T 2A3 b On leave of absence form Moscow State University, 119889 Moscow, Russia c Now at FNAL, PO Box 500 Batavia, IL 60510, USA. d Now at Fraunhofer Inst. für Solar Energiesysteme, D-79100 Freiburg, Germany e Now at Fakultät für Physik, Univ. Freiburg, Germany f Now at Institute for Cosmic Ray Research, University of Tokyo, Japan g Now at Thomas Jefferson Lab, Newport News, VA 23606, USA h University of Iowa, Iowa City, IA 52242, USA i Now at Technische Universitaät München, Garching, Germany j NIKEF, 1009 DB Amsterdam, The Netherlands k supported by the UK PPARC l supported by the Bundesministerium für Bildung, Wissenschaft, Forschung und Technologie, Germany, under contract numbers 05 5HD15I, 06 HD524I and 06 MZ5265