Recent results on kaon decays by the NA48/2 experiment at CERN

被引：0

作者：

Bloch-Devaux, Brigitte ^{[1
]}

Venditti, Stefano ^{[1
]}

机构：

[1] CERN, CH-1211 Geneva 23, Switzerland

来源：

HYPERFINE INTERACTIONS | 2016年 / 237卷

关键词：

Flavour physics; Kaon physics; Rare decays; Dark photon; SEARCH;

D O I：

10.1007/s10751-016-1318-1

中图分类号：

O64 [物理化学（理论化学）、化学物理学]; O56 [分子物理学、原子物理学];

学科分类号：

070203 ; 070304 ; 081704 ; 1406 ;

摘要：

The NA48/2 experiment reports the first observation of the rare decay K (+/-) -> pi (+/-) pi (0) e (+) e (-), based on about 2000 candidates from 2003 data. The preliminary branching ratio in the full kinematic region is . A sample of 4.687 x 10(6) events collected in 2003/4 is analyzed to search for the dark photon () via the decay chain K (+/-) -> pi (+/-) pi (0), , . No signal is observed, limits in the plane mixing parameter epsilon (2) versus its mass are reported.

引用

页数：7