Radiative Decay Width Measurements of Neutral Kaon Excitations Using the Primakoff Effect

Details Radiative Decay Width Measurements of Neutral Kaon Excitations Using the Primakoff Effect Radiative Decay Width Measurements of Neutral Kaon Excitations Using the Primakoff Effect

2001-10-09

arxiv.org/abs/hep-ex/0110016v1

Phys.Rev.Lett.89:072001,2002

Physics

High Energy Physics

High Energy Physics - Experiment

PRL-size article, 4 figures

Scientific paper

10.1103/PhysRevLett.89.072001

We produce a sample consisting of 147 candidate events, with minimal backgrounds, of the mixed axial vector pair K1(1270)-K1(1400) by exciting Kl's in the Coulomb field of lead and report the first measurements of the radiative widths Gamma_r(K1(1400)) = 280.8+-23.2(stat)+-40.4(syst) keV and Gamma_r(K1(1270)) = 73.2+- 6.1(stat)+-28.3(syst) keV. We also place 90% CL upper limits Gamma_r(K*(1410)) < 52.9 keV for the vector state and Gamma_r(K2*(1430)) < 5.4 keV for the tensor state. These measurements allow for significant tests of quark-model predictions of radiative widths for the low-lying vector mesons.

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