使用OKA检测器的辐射k+ - > pi0 e+ nuγ衰减中T -ODD不对称的测量

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使用OKA检测器的辐射k+ - > pi0 e+ nuγ衰减中T -ODD不对称的测量

Measurement of T-odd asymmetry in radiative K+ -> pi0 e+ nu gamma decay using OKA detector

论文作者

Polyarush, A. Yu., Akimenko, S. A., Artamonov, A. V., Bychkov, V. N., Donskov, S. V., Duka, V. A., Inyakin, A. V., Gorin, A. M., Gushchin, E. N., Filin, A. P., Filippov, S. N., Kekelidze, G. D., Kolosov, V. N., Kravtsov, V. I., Khaustov, G. V., Kholodenko, S. A., Khudyakov, A. A., Kudenko, Yu. G., Kulik, A. V., Kurshetsov, V. F., Lishin, V. A., Lysan, V. M., Medynsky, M. V., Obraztsov, V. F., Ohotnikov, A. V., Polyakov, V. A., Romanovsky, V. I., Rykalin, V. I., Sadovsky, A. S., Samoilenko, V. D., Tyurin, I. S., Tchikilev, O. G., Uvarov, V. A., Yushchenko, O. P., Zalikhanov, B. Zh.

论文摘要

该论文列出了辐射衰变中T-ODD相关性的测量\ Boldmath $ K^+ \rightArrowπ^{0} e^{+}ν_{e}γ$在安装了101200个候选事件时，已确定了所研究衰减的101200候选事件。测量的相关性$ξ_{πeγ} $ - 是矩$ e^{+} $的混合产物，$ e^{+π^{0} $，$γ$，$γ$，$ m^{3} _ {k} $在kaon REST系统中。用$ξ_{πeγ} $评估分布的不对称性，所使用的值是$ a_配对= \ frac {n _ {+} - n _ { - }} {n _ {+}+}+n _ { - }+n _ { - }}} $，where $ n _ _ {+nese $ nesse $ nesse $ nesse $ evter $ nesse $。对于$a_ξ$不对称，获得该值$a_ξ=（+0.1 \ pm 3.9（$ stat。$）\ pm1.7（$syst。$））\ times10^{ - 3} $或$ | a_ped | <5.4 \ times10^{ - 3}（90 \％〜cl）$

The paper presents a measurement of the T-odd correlation in radiation decay \boldmath $K^+ \rightarrow π^{0} e^{+} ν_{e} γ$ performed on the installation of the 101200 candidate events of the investigated decay were identified. Measured correlation $ξ_{πe γ}$ -is a mixed product of moments $e^{+}$, $π^{0}$, $γ$ in the kaon rest system, normalized by $M^{3}_{K}$. To assess the asymmetry of the distribution by $ξ_{πe γ}$ the value used is $A_ξ= \frac {N_{+}-N_{-}} {N_{+}+N_{-}}$, where $N_{+(-)}$ is the number of events with $ξ$ greater than (less than) zero. For the $A_ξ$ asymmetry, the value is obtained $A_ξ = (+0.1 \pm 3.9($stat.$) \pm1.7($syst.$))\times10^{-3}$ or $|A_ξ| < 5.4\times10^{-3} (90\%~ CL)$

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