arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节(Veterans Day),12 日无更新
arXiv 1707.06150hep-phhep-exnucl-th
收藏

手征化学势引发的轻介子衰变

Decays of light mesons triggered by chiral chemical potential

A. A. Andrianov, V. A. Andrianov, D. Espriu, A. E. Putilova, A. V. Iakubovich

摘要:

利用与QCD相关的介子有效拉格朗日量,分析了手征不平衡环境中的轻介子($π,\ σ,\ a_0$)性质。在手征电荷密度的影响下,由于$π$和$a_0$介子的混合,标量介子出现了新的空间宇称违反衰变。π介子的电磁形状因子得到了一个不寻常的奇宇称贡献。π介子的有效质量取决于它们的速度,并可能在飞行中消失。根据上述现象讨论了在重离子碰撞中确定手征化学势的可能性。

英文摘要:

Light meson ( $π,\ σ,\ a_0$) properties in the environment with chiral imbalance are analyzed with the help of meson effective Lagrangian associated with QCD. New spatial parity violating decays of scalar mesons arise as a result of mixing of $π$ and $a_0$ mesons under influence of chiral charge density. The pion electromagnetic form-factor gets an unusual parity-odd contribution. Pion effective masses depend on their velocities and may vanish in flight. The possible determination of chiral chemical potential in heavy ion collisions based on above mentioned phenomena is discussed.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑