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論文

Multi-scale synchrotron X-ray scattering studies on thermo-induced changes in structural and mechanical properties of CSH/PCE composites

Im, S.*; Jee, H.*; 兼松 学*; 諸岡 聡; Choe, H.*; 西尾 悠平*; 町田 晃彦*; 冨永 亜希; Jeon, B. H.*; Bae, S.*

Construction and Building Materials, 459, p.139742_1 - 139742_17, 2025/01

https://doi.org/10.1016/j.conbuildmat.2024.139742
 被引用回数：6 パーセンタイル：33.30(Construction & Building Technology)

The influence of thermal deformation in lattice structure and inter-atomic distance on the residual mechanical properties of calcium silicate hydrate (CSH)/polycarboxylate superplasticizer (PCE) composites at varying Ca/Si ratios remains ambiguous. Here, correlations between the multiscale structural transformation and mechanical properties of CSH/PCE composites with Ca/Si ratios ranging of 0.6 to 1.0 are investigated using ex situ small-angle X-ray scattering (Q = 0.005 - 2.7 $AA$^{-}$$) and in situ loading wide-angle X-ray scattering (Q = 1 - 18.5 $AA$^{-}$$).

論文

Search for the radiative penguin decays $$B^{0} to K_S^{0}K_S^{0}$$$$gamma$$ in the Belle experiment

Jeon, H. B.*; 谷田 聖; Belle Collaboration*; 他219名*

Physical Review D, 106(1), p.012006_1 - 012006_9, 2022/07

https://doi.org/10.1103/PhysRevD.106.012006
 被引用回数：1 パーセンタイル：7.66(Astronomy & Astrophysics)

We report the first search for the penguin-dominated process $$B^0 rightarrow K_S^0 K_S^0 gamma$$ using the full data sample of $$772times 10^6$$ $$Bbar{B}$$ pairs collected with the Belle detector at the KEKB asymmetric-energy $$e^+ e^-$$ collider. We do not observe any statistically significant signal yield in the $$K_S^0$$-pair invariant mass range 1 GeV/$$c^2 < M_{K_S^0 K_S^0} < $$ 3 GeV/$$c^2$$, and set the following upper limits at 90% confidence level: $$mathcal{B}(B^0 to K_S^0 K_S^0 gamma) < 5.8times10^{-7}$$, $$mathcal{B}(B^0 to f_2 gamma)times mathcal{B}(f_2 (1270) to K_S^0 K_S^0 ) < 3.1times10^{-7}$$, and $$mathcal{B}(B^0 to f_2^{prime} gamma)times mathcal{B}(f_2^{prime} (1525) to K_S^0 K_S^0 ) < 2.1times10^{-7}$$. Further, 90% confidence upper limits have also been set in the range of [0.7-2.9]$$times10^{-7}$$ on the $$B^0 rightarrow K_S^0 K_S^0 gamma$$ branching fraction in bins of $$M_{K_S^0 K_S^0}$$.

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