Interplay of quark and meson degrees of freedom in near-threshold states: A practical parametrization for line shapes

doi:http://dx.doi.org/10.1103/PhysRevD.93.074031

CORC > 理论物理研究所 > 中国科学院理论物理研究所 > 理论物理所科研产出 > 理论物理所1978-2010年知识产出

	Interplay of quark and meson degrees of freedom in near-threshold states: A practical parametrization for line shapes
	Guo, FK ; Hanhart, C ; Kalashnikova, YS ; Matuschek, P ; Mizuk, RV ; Nefediev, AV ; Wang, Q ; Wynen, JL
刊名	PHYSICAL REVIEW D
	2016
卷号	93 期号:7 页码:74031
关键词	Z(B) STATES X(3872) PARTICLES
DOI	http://dx.doi.org/10.1103/PhysRevD.93.074031
英文摘要	We propose a practical parametrization for the line shapes of near-threshold states compatible with all requirements of unitarity and analyticity. The coupled-channel system underlying the proposed parametrization includes bare poles and an arbitrary number of elastic and inelastic channels treated fully nonperturbatively. The resulting formulas are general enough to be used for a simultaneous analysis of the data in all available production and decay channels of the (system of) state(s) under consideration for a quite wide class of reactions. As an example, we fit the experimental data currently available for several decay channels for the charged Z(b)((r)) states in the spectrum of bottomonia and find a good overall description of the data. We find the present data to be consistent with the Z(b)(10610) as a virtual state and with the Z(b)(10650) as a resonance, both residing very close to the B (B) over bar* and B(B) over bar threshold, respectively.
学科主题	Astronomy & Astrophysics ; Physics
语种	英语
资助机构	DFG ; NSFC [11261130311] ; Russian Science Foundation [15-12-30014] ; Thousand Talents Plan for Young Professionals
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/23188]
专题	理论物理研究所_理论物理所1978-2010年知识产出
作者单位	1.Wang, Q.] Univ Bonn, Bethe Ctr Theoret Phys, D-53115 Bonn, Germany 2.[Hanhart, C. 3.Matuschek, P. 4.Wang, Q. 5.Wynen, J. -L.] Forschungszentrum Julich, Inst Adv Simulat, Inst Kernphys Theorie, D-52425 Julich, Germany 6.Wynen, J. -L.] Julich Ctr Hadron Phys, D-52425 Julich, Germany 7.[Kalashnikova, Yu. S. 8.Nefediev, A. V.] Inst Theoret & Expt Phys, B Cheremushkinskaya 25, Moscow 117218, Russia 9.[Mizuk, R. V.] Lebedev Phys Inst, Leninsky Prospect 53, Moscow 119991, Russia 10.[Mizuk, R. V.
推荐引用方式 GB/T 7714	Guo, FK,Hanhart, C,Kalashnikova, YS,et al. Interplay of quark and meson degrees of freedom in near-threshold states: A practical parametrization for line shapes[J]. PHYSICAL REVIEW D,2016,93(7):74031.
APA	Guo, FK.,Hanhart, C.,Kalashnikova, YS.,Matuschek, P.,Mizuk, RV.,...&Wynen, JL.(2016).Interplay of quark and meson degrees of freedom in near-threshold states: A practical parametrization for line shapes.PHYSICAL REVIEW D,93(7),74031.
MLA	Guo, FK,et al."Interplay of quark and meson degrees of freedom in near-threshold states: A practical parametrization for line shapes".PHYSICAL REVIEW D 93.7(2016):74031.