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题名: Can X(5568) be described as a B-s pi, B(K)over-bar resonant state?
作者: Albaladejo, M; Nieves, J; Oset, E; Sun, ZF; Liu, X(刘翔)
收录类别: SCIE
出版日期: 2016-06-10
刊名: PHYSICS LETTERS B
卷号: 757, 页码:515-519
英文摘要: The DO Collaboration has recently seen a resonant-like peak in the B-s pi invariant mass spectrum, claimed to be a new state called X(5568). Using a B-s pi-B (K) over bar coupled channel analysis, implementing unitarity, and with the interaction derived from Heavy Meson Chiral Perturbation Theory, we are able to reproduce the reported spectrum, with a pole that can be associated to the claimed X(5568) state, and with mass and width in agreement with the ones reported in the experimental analysis. However, if the T-matrix regularization is performed by means of a momentum cutoff, the value for the latter needed to reproduce the spectrum is Lambda = 2.80 +/- 0.04 GeV, which is much larger than a "natural" value Lambda similar or equal to 1 GeV. In view of this, it is difficult to interpret the nature of this new state. This state would not qualify as a resonance dynamically generated by the unitarity loops. Assuming the observed peak to correspond to a physical state, we make predictions for partners in the D, D*, and B* sectors. Their observation (or lack thereof) would shed light into this issue. (C) 2016 The Authors. Published by Elsevier B.V.
作者部门: [Albaladejo, Miguel ; Nieves, Juan ; Oset, Eulogio ; Sun, Zhi-Feng] Univ Valencia, CSIC, Inst Invest Paterna, Inst Fis Corpuscular IFIC,Ctr Mixto, Aptd 22085, E-46071 Valencia, Spain ; [Liu, Xiang] Lanzhou Univ, Sch Phys Sci & Technol, Lanzhou 730000, Peoples R China ; [Liu, Xiang] Lanzhou Univ, Res Ctr Hadron & CSR Phys, Lanzhou 730000, Peoples R China ; [Liu, Xiang] Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China
通讯作者: Albaladejo, M (reprint author), Univ Valencia, CSIC, Inst Invest Paterna, Inst Fis Corpuscular IFIC,Ctr Mixto, Aptd 22085, E-46071 Valencia, Spain.
学科分类: Astronomy & Astrophysics; Physics
文章类型: Article
所属项目编号: Juan de la Cierva program from the Spanish MINECO [27-13-463B-731] ; Spanish MINECO ; European FEDER funds [FIS2014-51948-C2-1-P, FIS2014-51948-C2-2-P, FIS2014-57026-REDT, SEV-2014-0398] ; Generalitat Valenciana [PROMETEOII/2014/0068]
语种: 英语
DOI: 10.1016/j.physletb.2016.04.033
ISSN号: 0370-2693
WOS记录号: WOS:000376800300072
IR记录号: WOS:000376800300072
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内容类型: 期刊论文
URI标识: http://ir.lzu.edu.cn/handle/262010/181614
Appears in Collections:物理科学与技术学院_期刊论文

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Recommended Citation:
Albaladejo, M,Nieves, J,Oset, E,et al. Can X(5568) be described as a B-s pi, B(K)over-bar resonant state?[J]. PHYSICS LETTERS B,2016,757:515-519.
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