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1. chinaXiv:201705.00571 [pdf]

Dispersion characterisation of CaCO3 particles in PP/CaCO3 composites

Zhu, YD [Zhu, Y. D.][ 1,2 ]; Allen, GC [Allen, G. C.][ 2 ]; Jones, PG [Jones, P. G.][ 3 ]; Adams, JM [Adams, J. M.][ 4 ]; Gittins, DI [Gittins, D. I.][ 3 ]; Heard, PJ [Heard, P. J.][ 2 ]; Skuse, DR [Skuse, D. R.][ 3 ]
Subjects: Physics >> General Physics: Statistical and Quantum Mechanics, Quantum Information, etc.

Polypropylene and calcium carbonate were prepared by melt extrusion in a twin screw extruder or cast- ing in a kneader extruder. The dispersion of CaCO3 particles in PP was analysed through the observation of impact-fracture surface, polished surface, cross-section surface and film using scanning electron microscopy (SEM), focused ion beam (FIB) and optical transmission microscopy (OTM). Only basic infor- mation on particle dispersion was obtained from the investigation of fracture surfaces by SEM and the FIB cross-sections by virtue of the ambiguous phase contrast and the limited area observed. However, the SEM images from polished-surfaces and the film images observed in OTM show the different particle dispersion in different samples. The derived Particle Size Distribution (PSD) curves from OTM images explain the difference of impact strength, demonstrating the relationship between particle dispersion and mechanical properties.

submitted time 2017-05-02 Hits2081Downloads364 Comment 0

2. chinaXiv:201612.00391 [pdf]

Strong supersymmetric quantum effects on top quark production at the Fermilab Tevatron

Li,C; Zhou,H; Zhu,Y; Yang,J

The supersymmetric QCD corrections to top quark pair production by qq ? anni- hilation in pp ? collisions are calculated in the minimal supersymmetric model. We consider effects of the mixing of the scalar top quarks on the corrections to the total tt ?production cross section at the Fermilab Tevatron. We found that such correction is less sensitive to squark mass and gluino mass than in no-mixing case, and in both cases the corrections can exceed 10% even if we consider the recent CDF limit on squark and gluino masses.

submitted time 2016-12-28 Hits1197Downloads659 Comment 0

3. chinaXiv:201612.00389 [pdf]

Yukawa corrections to top pair production in photon-photon collision

Li,C; Yang,J; Zhu,Y; Zhou,H

The O(αmt 2/mW 2)O(αmt 2/mW 2)O(\alpha m_t~2/m_W~2) Yukawa corrections to top pair production in photon-photon collision are calculated in the standard model (SM), the general two-Higgs-doublet model (2HDM) as well as the minimal supersymmetric model (MSS

submitted time 2016-12-28 Hits1114Downloads612 Comment 0

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