Radiative widths of neutral kaon excitations

Pramana

KTeV Collaboration¹  Sunil V Somalwar1² 

[1] $$;Department of Physics, Rutgers University, Piscataway, New Jersey 08854, USA$$

关键词: Radiative width;    kaon;    Primakoff.;   

DOI  :  

学科分类：物理（综合）

来源: Indian Academy of Sciences

【 摘 要 】

We observe 147 events of the axial vector pair $K_{1} (1270) - K_{1} (1400)$ produced in the Coulomb field of a Pb target and measure the radiative widths $𝛬 (K_{1} (1400) → K^{0} + 𝛾) = 280.8 ± 23.2$ (stat.) $± (40.4)$ (syst.) keV and $𝛬 (K_{1} (1270) → K^{0} + 𝛾) = 73.2 ± 6.1$ (stat.) $± 28.3$ (syst.) keV. These first measurements are lower than the quark-model predictions. We also place upper limits on the radiative widths for $K^{*} (1410)$ and $K_{2}^{*} (1430)$ and find that the letter is very small in accord with $SU(3)$ invariance in the naive quark model.

【 授权许可】

Unknown