K+ → π0μ+νγ Radiative Decay: Recent Results from the ''OKA'' Experiment

被引：0
|
作者：
Tiurin, I. S. [1 ]
机构：
[1] Natl Res Ctr Kurchatov Inst IHEP, Protvino 142281, Moscow, Russia
来源：
MOSCOW UNIVERSITY PHYSICS BULLETIN | 2024年 / 79卷 / SUPPL1期
基金：
俄罗斯科学基金会;
关键词：
OKA detector; kaon; radiative decay;
D O I：
10.3103/S0027134924700929
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The K+ -> pi(0)mu(+)nu gamma (K-mu 3 gamma) decay is measured with OKA detector at the RF-separated 17.7 GeV/c momentum kaon beam from the U-70 synchrotron. The data obtained corresponds to the value of 2.62 x 10(10) "live" kaons passing to the decay volume. About 1000 K-mu 3 gamma events are extracted. The ratio of Br(K-mu 3 gamma)/Br(K-mu 3) is measured. The T-odd correlation xi(pi mu gamma), which is the mixed product of the momenta of mu(+), pi(0), and gamma in the kaon rest frame, is measured. The asymmetry of the distribution in xi is characterized by the ratio A(xi) = (N+ - N-)/(N+ + N-), where N+ (N-) is the number of events with positive (negative) xi. The values of A(xi) is obtained. Our results are preliminary, with systematic errors being estimated.
引用
收藏
页码：131 / 134
页数：4
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