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arXiv 1109.0219hep-ex
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衍射解离成$K_sK^{\pm}π^{\mp}π^{-}$终态

Diffractive dissociation into $K_sK^{\pm}π^{\mp}π^{-}$ final states

Johannes Bernhard, Frank Nerling

摘要:

CERN/SPS的COMPASS固定靶实验致力于强子结构和光谱学的研究,特别是寻找自旋奇异态。在开始研究2004年中试运行数据中自旋奇异$π_1(1600)$共振的存在之后,新的2008/09数据将使我们能够进一步澄清这种情况。除了$π_1(1600)$共振外,在E852/BNL实验的$f_1(1285)π$衰变通道中也报道了自旋奇异的$π_1(2000)$,然而,这种状态仍然缺乏确认。我们提出了衍射产生的$(K\bar{K}ππ)^{-}$系统的第一事件选择,在竞争统计中显示干净的$f_1(1285)$和$f_1(1420)$共振。对$f_1(1285)π$和$f_1(1420)π$衰变通道开始的分波分析将进一步完成2008/09年COMPASS数据中自旋外来物的搜索。

英文摘要:

The COMPASS fixed-target experiment at CERN/SPS is dedicated to the study of hadron structure and spectroscopy, especially the search for spin-exotic states. After having started to study the existence of the spin-exotic $π_1(1600)$ resonance in the 2004 pilot-run data, the new 2008/09 data will enable us to further clarify the situation. Apart from the $π_1(1600)$ resonance, also a spin-exotic $π_1(2000)$ was reported in the past in the $f_1(1285)π$ decay channel by the E852/BNL experiment, however, this state still lacks confirmation. We present a first event selection of the diffractively produced $(K\bar{K}ππ)^{-}$ system showing clean $f_1(1285)$ and $f_1(1420)$ resonances at competing statistics. A partial-wave analysis started on $f_1(1285)π$ and $f_1(1420)π$ decay channels will further complete the search for spin-exotics in the 2008/09 COMPASS data.

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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