Non-perturbative Calculation of the Positronium Mass Spectrum in Basis Light-Front Quantization

被引：4

作者：

Wiecki, Paul ^{[1
]}

Li, Yang ^{[1
]}

Zhao, Xingbo ^{[1
]}

Maris, Pieter ^{[1
]}

Vary, James P. ^{[1
]}

机构：

[1] Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA

来源：

FEW-BODY SYSTEMS | 2015年 / 56卷 / 6-9期

基金：

美国国家科学基金会;

关键词：

QCD;

D O I：

10.1007/s00601-015-0962-3

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report on recent improvements to our non-perturbative calculation of the positronium spectrum. Our Hamiltonian is a two-body effective interaction which incorporates one-photon exchange terms, but neglects fermion self-energy effects. This effective Hamiltonian is diagonalized numerically in a harmonic oscillator basis at strong coupling () to obtain the mass eigenvalues. We find that the mass spectrum compares favorably to the Bohr spectrum of non-relativistic quantum mechanics evaluated at this unphysical coupling.

引用

页码：489 / 494

页数：6

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