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- Irene J Hsu, Yannick C Kimmel, Xiaoqiang Jiang, Brian G. Willis, Jingguang G Chen
- Chemical communications
- 2012

Pt was deposited onto tungsten carbide powders using atomic layer deposition to produce core-shell catalysts for the hydrogen evolution reaction (HER). The Pt loading on these catalysts was reduced nearly ten-fold compared to a bulk Pt catalyst while equivalent HER activities were observed.

We study the long distance contribution to K+ → π+νν̄ by using chiral perturbation theory. We find that the tree level O(P 2) contribution vanishes identically without assuming the large Nc limit. The leading contribution arises from the one-loop amplitude, which is O(P 4) in the chiral power counting. The branching ratio of the long distance contribution… (More)

We calculate long distance contributions to K → πνν̄ , ππνν̄, and πππνν̄ modes within the framework of chiral perturbation theory. We find that these contributions to decay rates of K → πνν̄ and K → ππνν̄ in the chiral logarithmic approximation are at least seven orders of magnitude suppressed relative to those from the short distance parts. The long… (More)

- KL → ππ−νν, Chao-Qiang Geng, Irene J Hsu, Y-S. Lin
- 1994

We study both CP conserving and violating contributions to the decay KL → ππνν̄. We find that the decay branching ratio is dominated by the CP conserving part. In the standard CKM model, we estimate that for mt ∼ 174 GeV , the branching ratio due to the CP conserving (violating) contributions can be as large as 4.4× 10 (1.0× 10).

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