会议论文详细信息
10th International Conference on Kaon Physics
Dispersive analysis of KS → γγ and KS → γl+l?
Tunstall, Lewis C.^1 ; Colangelo, Gilberto^1 ; Stucki, Ramon^1
Albert Einstein Centre for Fundamental Physics, Institute for Theoretical Physics, University of Bern, Sidlerstrasse 5, Bern
CH-3012, Switzerland^1
关键词: Chiral perturbation theory;    Decay rate;    Dispersion relations;    Dispersive analysis;    Final state;    Gammagamma;   
Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/800/1/012034/pdf
DOI  :  10.1088/1742-6596/800/1/012034
来源: IOP
PDF
【 摘 要 】

We calculate the decay rates for KS→ γγ and KS→ γl+l-(l = e or μ)within a dispersive framework in which the weak Hamiltonian carries momentum. Given input from KS→ ππ and γγ(∗)→ππ, we solve the once-subtracted dispersion relations numerically and find that final-state ππ interactions generate sizeable corrections to the predictions from 3-flavour chiral perturbation theory. Our analysis predicts BR(KS→ γγ) = (2.34 ± 0.31) × 10-6, BR(KS→ γe+e-) = (4.38 ± 0.57) × 10-8, and BR(KS→ γμ+μ-) = (1.45 ± 0.27) × 10-9.

【 预 览 】
附件列表
Files Size Format View
Dispersive analysis of KS → γγ and KS → γl+l? 709KB PDF download
  文献评价指标  
  下载次数:10次 浏览次数:18次