S wave Kπ scattering and effects of κ in J/ψ →(K)over-bar*0(892)K+π-

被引：56

作者：

Guo, F-K.

Ping, R. -G.

Shen, P. -N.

Chiang, H. -C.

Zou, B. -S.

机构：

[1] CCAST, World Lab, Beijing 100080, Peoples R China

[2] Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China

[3] SW Univ, Chongqing 400715, Peoples R China

[4] Chinese Acad Sci, Inst Theoret Phys, Beijing 100864, Peoples R China

[5] Ctr Theoret Nucl Phys, Natl Lab Heavy Ion Accelerator, Lanzhou 730000, Peoples R China

[6] Grad Univ Beijing, Chinese Acad Sci, Beijing 100049, Peoples R China

来源：

NUCLEAR PHYSICS A | 2006年 / 773卷 / 1-2期

基金：

中国国家自然科学基金;

关键词：

chiral perturbation theory; Bethe-Salpeter equation; K pi scattering; final state interaction;

D O I：

10.1016/j.nuclphysa.2006.04.008

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

K pi S wave scattering is studied using a chiral unitary approach (ChUT) taking into account coupled channels. With the amplitudes derived from the lowest order chiral Lagrangian as the kernel of a set of coupled channel Bathe-Salpeter equations, the I = 1/2 S wave K pi scattering phase shifts below 1.2 GeV can be fitted by one parameter, a subtraction constant, and a scalar resonance corresponding to the controversial K (K-0(*) (800)) can be generated dynamically. A good description of the I = 3/2 S wave K pi scattering phase 0 shifts below 1.2 GeV can also be obtained. An artificial singularity in the cut-off method of the 2-meson loop integral of the ChUT is found. The formalism is applied to deal with the S wave K pi final state interaction (FSI) in the decay J/psi ->(K) over bar (*0)(892)K+pi(-), and a qualitatively good fit to the data is achieved. The role Of K in the decay is discussed. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：78 / 94

页数：17

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