Λ超核双核子诱导非介子弱衰变的改进测定
核实验
2011-01-25 v1
摘要
Λ超核无π介子发射的衰变，称为非介子弱衰变，为研究 ΔS=1 四重子相互作用提供了有效工具。理论上曾提出，双核子诱导机制可能在再现观测到的非介子弱衰变率和核子谱中起重要作用，但目前尚未获得该机制的直接证据。FINUDA 实验利用探测超核衰变产生的带电粒子和中性粒子的可能性，使我们能够推断出双核子诱导衰变率在总非介子弱衰变率中的相对权重。推导出的 Γ_{2N}/Γ_{NMWD}=0.24±，其误差与之前的评估相比减小了超过一半。
引用
@article{arxiv.1101.4481,
title = {An improved determination of the two--nucleon induced non mesonic weak decay of $\Lambda$-hypernuclei},
author = {M. Agnello and L. Benussi and M. Bertani and H. C. Bhang and G. Bonomi and E. Botta and M. Bregant and T. Bressani and S. Bufalino and L. Busso and D. Calvo and P. Camerini and B. Dalena and F. De mori and G. D'erasmo and F. L. Fabbri and A. Feliciello and A. Filippi and E. M. Fiore and H. Fujioka and P. Genova and P. Gianotti and N. Grion and V. Lucherini and S. Marcello and N. Mirfakhrai and F. Moia and P. Montagna and O. Morra and T. Nagae and H. Outa and A. Pantaleo and V. Paticchio and S. Piano and R. Rui and G. Simonetti and R. Wheadon and A. Zenoni and G. Garbarino},
journal= {arXiv preprint arXiv:1101.4481},
year = {2011}
}
备注
10 pages, 3 figures