A search for a promising tetraquark candidate X(ud($)over-bar($)over-bar($)over-bar) in pn -> Lambda Lambda X
Liu XH(刘晓海); Zhao Q(赵强); Liu, XH; Zhao, Q
刊名JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS
2009
卷号36期号:1页码:15003
学科分类Physics
DOI10.1088/0954-3899/36/1/015003
通讯作者[Liu, Xiao-Hai ; Zhao, Qiang] Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China ; [Zhao, Qiang] Univ Surrey, Dept Phys, Guildford GU2 7XH, Surrey, England ; [Zhao, Qiang] Chinese Acad Sci, Theoret Phys Ctr Sci Facil, Beijing 100049, Peoples R China
文章类型Article
英文摘要We propose to search for a tetraquark candidate X(ud ($) over bar($) over bar) in pn -> Lambda Lambda X(ud ($) over bar($) over bar) -> Lambda Lambda K(+)K(0) or Lambda Lambda KK*. The existence of a tetraquark state X(ud ($) over bar($) over bar) with J(P) = 0(+), 1(-) or 1(+) was predicted in the literature based on specific diquark effective degrees of freedom inside hadrons. In order to understand the underlying dynamics for exotic hadrons, a search for the tetraquark X(ud ($) over bar($) over bar) is strongly recommended. The proposed reaction involves two Lambda production, of which the narrow widths make it a great advantage in the analysis of the final-state missing mass spectrum. We make an estimate of the production rate of X(ud ($) over bar($) over bar) in an effective Lagrangian theory and find that for J(P) = 1(-) the sample events of similar to 2200nb(-1) will be able to identify X(ud ($) over bar($) over bar) with five standard deviations at a width of 10 MeV to K(+)K(0) near threshold. For J(P) = 1(+) with a width of 20 MeV to KK*, the sample events of similar to 130nb(-1) will be needed. Large production cross sections are expected in a kinematic region beyond the threshold. We emphasize the advantage of low background in this transition channel, and in the meantime caution the large uncertainties in the present estimate due to a lack of knowledge about the X(ud ($) over bar($) over bar) state. Implications for its heavy-flavored partners qq ($) over bar($) over bar and qq ($) over bar($) over bar are briefly discussed.
类目[WOS]Physics, Nuclear ; Physics, Particles & Fields
研究领域[WOS]Physics
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语种英语
WOS记录号WOS:000260886800004
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文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/240453
专题中国科学院高能物理研究所_理论物理室_期刊论文
作者单位中国科学院高能物理研究所
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Liu XH,Zhao Q,Liu, XH,et al. A search for a promising tetraquark candidate X(ud($)over-bar($)over-bar($)over-bar) in pn -> Lambda Lambda X[J]. JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS,2009,36(1):15003.
APA 刘晓海,赵强,Liu, XH,&Zhao, Q.(2009).A search for a promising tetraquark candidate X(ud($)over-bar($)over-bar($)over-bar) in pn -> Lambda Lambda X.JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS,36(1),15003.
MLA 刘晓海,et al."A search for a promising tetraquark candidate X(ud($)over-bar($)over-bar($)over-bar) in pn -> Lambda Lambda X".JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS 36.1(2009):15003.
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