Measurement of structure dependent radiative K+ → e+νγ decays using stopped positive kaons
Measurement of structure dependent radiative K+ → e+νγ decays using stopped positive kaons
复制标题
使用停止的正 kaons 测量结构依赖的辐射 K α γ 衰变
DOI:
10.1016/j.physletb.2022.136913
复制
发表时间:
2022
影响因子:
4.4
通讯作者:
Horie, K.
中科院分区:
文献类型:
--
作者:
Ito, H.;Kobayashi, A.;Bianchin, S.;Cao, T.;Djalali, C.;Dongwi, D.H.;Gautam, T.;Gill, D.;Hasinoff, M.D.;Horie, K.
The structure dependent radiative K+→ e+ ν γ (K e 2 γ S D+) decay was investigated with stopped positive kaons. The e+ momentum spectra containing 574±30 K e 2 γ S D+ events with a K+→ μ+ ν (K μ 2) background of 28±19 events were measured with and without a photon in coincidence and analyzed with Monte Carlo simulations for acceptance and detector response to extract the ratio of the branching ratio of the K e 2 γ S D+ decay and the K+→ e+ ν decay including the internal bremsstrahlung process (K e 2 (γ)). A value of B r (K e 2 γ S D+)/B r (K e 2 (γ))= 1.12±0.07 stat±0.04 syst was obtained. This indicates a partial branching ratio, B r (K e 2 γ S D+, p e> 200 MeV/c, E γ> 10 MeV)/B r (K μ 2)=(1.85±0.11 stat±0.07 syst)× 10− 5, which is 25%(∼ 2.5σ) higher than the previous experimental result.
登录
查看更多内容
DOI:
--
发表时间:
2005
期刊:
影响因子:
--
作者:
C. Gatti
通讯作者:
C. Gatti
DOI:
--
发表时间:
2000
期刊:
影响因子:
--
作者:
Y.;The KEK
通讯作者:
The KEK
DOI:
--
发表时间:
1995
期刊:
影响因子:
--
作者:
M. Finkemeier
通讯作者:
M. Finkemeier
DOI:
10.1016/j.nima.2018.05.065
发表时间:
2018
期刊:
Detectors and Associated Equipment
影响因子:
--
作者:
Ito, H.;Horie, K.;Shimizu, S.;Bianchin, S.;Djalali, C.;Dongwi, B.;Gill, D.;Hasinoff, M.D.;Igarashi, Y.;Imazato, J.
通讯作者:
Imazato, J.
DOI:
--
发表时间:
2006
期刊:
影响因子:
--
作者:
M. Naruki;S. Ishimoto;T. Maruta;Y. Sato;S. Sawada;M. Sekimoto;H. Takahashi;T. Takahashi;A. Toyoda;K. Miwa;Y. Nakatsugawa
通讯作者:
Y. Nakatsugawa