Antiproton-proton annihilation into light neutral meson pairs within an effective meson theory

被引：2

作者：

Wang, Ying ^{[1
]}

Bystritskiy, Yury M. ^{[2
]}

Ahmadov, Azad I. ^{[2
,4
]}

Tomasi-Gustafsson, Egle ^{[3
]}

机构：

[1] Univ Paris Saclay, Inst Phys Nucl, F-91405 Orsay, France

[2] Inst Nucl Res, Dubna 141980, Russia

[3] Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France

[4] Azerbaijan Natl Acad Sci, Inst Phys, Baku, Azerbaijan

来源：

PHYSICAL REVIEW C | 2017年 / 96卷 / 02期

关键词：

QUANTUM CHROMODYNAMICS; FORM-FACTORS; MODEL; P(P)OVER-BAR; MOMENTUM;

D O I：

10.1103/PhysRevC.96.025204

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：

Antiproton-proton annihilation into light neutral mesons in the few GeV energy domain is investigated in view of a global description of the existing data and predictions for future work at the Antiproton Annihilation at Darmstadt (PANDA) experiment at the Facility for Antiproton and Ion Research (FAIR). An effective meson model earlier developed, with mesonic and baryonic degrees of freedom in s, t, and u channels, is applied here to pi(0) pi(0) production. Form factors with logarithmic s and t (u) dependencies are applied. A fair agreement with the existing angular distributions is obtained. Applying SU(3) symmetry, it is straightforward to recover the angular distributions for pi(0)eta and eta eta production in the same energy range. A good agreement is generally obtained with all existing data.

引用

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