Can X(5568) be described as a B-s pi, B(K)over-bar resonant state?

doi:10.1016/j.physletb.2016.04.033

	Can X(5568) be described as a B-s pi, B(K)over-bar resonant state?
	Albaladejo, Miguel 1; Nieves, Juan 1; Oset, Eulogio 1; Sun, Zhi-Feng 1; Liu, Xiang 2,3,4
刊名	PHYSICS LETTERS B
	2016-06-10
卷号	757 页码:515-519
ISSN号	0370-2693
DOI	10.1016/j.physletb.2016.04.033
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.
资助项目	"Juan de la Cierva" program from the Spanish MINECO[27-13-463B-731] ; Spanish MINECO ; European FEDER funds[FIS2014-51948-C2-1-P] ; European FEDER funds[FIS2014-51948-C2-2-P] ; European FEDER funds[FIS2014-57026-REDT] ; European FEDER funds[SEV-2014-0398] ; Generalitat Valenciana[PROMETEOII/2014/0068]
WOS关键词	MESONS
WOS研究方向	Astronomy & Astrophysics ; Physics
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000376800300072
资助机构	"Juan de la Cierva" program from the Spanish MINECO ; Spanish MINECO ; European FEDER funds ; Generalitat Valenciana
内容类型	期刊论文
源URL	[http://119.78.100.186/handle/113462/42733]
专题	中国科学院近代物理研究所
通讯作者	Albaladejo, Miguel
作者单位	1.Univ Valencia, CSIC, Inst Invest Paterna, Inst Fis Corpuscular IFIC,Ctr Mixto, Aptd 22085, E-46071 Valencia, Spain 2.Lanzhou Univ, Sch Phys Sci & Technol, Lanzhou 730000, Peoples R China 3.Lanzhou Univ, Res Ctr Hadron & CSR Phys, Lanzhou 730000, Peoples R China 4.Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Albaladejo, Miguel,Nieves, Juan,Oset, Eulogio,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.
APA	Albaladejo, Miguel,Nieves, Juan,Oset, Eulogio,Sun, Zhi-Feng,&Liu, Xiang.(2016).Can X(5568) be described as a B-s pi, B(K)over-bar resonant state?.PHYSICS LETTERS B,757,515-519.
MLA	Albaladejo, Miguel,et al."Can X(5568) be described as a B-s pi, B(K)over-bar resonant state?".PHYSICS LETTERS B 757(2016):515-519.