On the electromagnetic form factors of hadrons in the time-like region near threshold

被引：38

作者：

Dalkarov, O. D. ^{[1
]}

Khakhulin, P. A. ^{[1
]}

Voronin, A. Yu. ^{[1
]}

机构：

[1] PN Lebedev Phys Inst, Moscow 117924, Russia

来源：

NUCLEAR PHYSICS A | 2010年 / 833卷 / 1-4期

关键词：

Form factor; Antibaryon; E+E ANNIHILATION; NBARN THRESHOLD; VECTOR STATE; LOW ENERGIES; PROTON; P(P)OVER-BAR; RESONANCES; E(+)E(-); PHYSICS;

D O I：

10.1016/j.nuclphysa.2009.11.015

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：

Hadron electromagnetic form factor in the time-like region at the boundary of the physical region is considered. The energy behavior of the form factor is shown to be determined by the strong hadron-antihadron interaction. We propose a simple phenomenological model of the h (h) over bar interaction that describes the form factor behaviour in the region where scattering length approximation fails and estimate on its basis imaginary part of the scattering lengths (volumes) for Lambda(Lambda) over bar, Lambda(Sigma) over bar (0)(Lambda(Sigma) over bar (0)), Sigma(0)(Sigma) over bar (0) and D*(D) over bar* from present experimental data. The developed approach enables us to analyze the existence of baryon-antibaryon (B) near threshold resonances. The experiments to extract detailed information on the near threshold B interaction from hadron form factor energy behavior are suggested. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：104 / 118

页数：15

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