Charged-Higgs on $$R_{D^{(*)}}$$ R D ( ∗ ) , $$\tau $$ τ polarization, and FBA

Chen, Chuan Hung; Nomura, Takaaki

doi:10.1140/epjc/s10052-017-5198-6

Cited by 63 publications

(84 citation statements)

References 57 publications

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“…It was interesting that the geometry dependence of the PP viscosity revealed in Figure 1 showed a large variation compared with the results reported in the literature, 17 in which the rheological behaviors of a POM melt flowing through microchannels were investigated on the basis of a melt viscosity measurement system. The results shown in Figure 1 in this study were opposite to those in ref.…”

Section: Effect Of the Temperature On The Geometry Dependence Of The mentioning

confidence: 76%

“…The results shown in Figure 1 in this study were opposite to those in ref. 17, even over a similar range of shear rate.…”

Section: Effect Of the Temperature On The Geometry Dependence Of The mentioning

confidence: 83%

“…First of all, the microchannels of square cross section used in ref. 17 should have been converted into an equivalent radius if the capillary flow model was adopted. Therefore, the channel geometry was different from the circle cross-section dies used in this study.…”

Section: Effect Of the Temperature On The Geometry Dependence Of The mentioning

confidence: 99%

“…Particularly, the shear viscosity in a microscope capillary is closely related to the material properties, which result from different molecular structures and distributions of molecular weights. Chen et al 17 established a melt viscosity measurement system for a polyformaldehyde (POM) melt flowing through a microchannel. The calculated results were compared with those of a polystyrene (PS) resin to explore the effect of the structure on the viscosity characteristics of the polymers within microchannels.…”

Section: Introductionmentioning

confidence: 99%

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Experimental investigation of the rheological behaviors of polypropylene in a capillary flow

Meng

Kelly

et al. 2016

J of Applied Polymer Sci

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The rheological characterization of polymer melts is strongly related to their material properties. In this study, we focused on the rheological behaviors of a polypropylene (PP) melt through a capillary die. With an advanced twin-bore capillary rheometer with dies measuring 1.0, 0.5, and 0.25 mm in diameter, experiments were performed over a shear-rate range of 3 3 10 2 to 5 3 10 3 s 21 at three temperatures, 210, 220, and 230 8C. The results demonstrate that the geometry dependence of the PP viscosity relied on the die diameter and the temperature of the PP melt. The viscosity values of the PP melt in the 0.25-mm diameter die were higher than were those in the 0.5-and 1.0-mm dies at 220 and 230 8C. However, the viscosity values in all of the tested dies were similar at 210 8C. The tendency for the viscosity to decrease as the temperature of the polymer melt increased weakened in the 0.25-mm diameter die. As a result, the pressure applied to the PP melt in the 0.25-mm diameter die increased; this caused a decrease in the free volume between molecules. On the basis of the Barus equation, the contribution of pressure to the changed viscosity in each die at each of the tested temperatures was calculated and was found to be as high as 32.86% in the 0.25-mm die at 230 8C. Additionally, the effect of the wall slip on the geometry dependence of the PP viscosity in the tested dies was investigated with a modified Mooney method. The values of the slip velocity revealed that wall slip occurred only in the 0.25-mm die at 210 8C.

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Section: Effect Of the Temperature On The Geometry Dependence Of The mentioning

confidence: 76%

“…The results shown in Figure 1 in this study were opposite to those in ref. 17, even over a similar range of shear rate.…”

Section: Effect Of the Temperature On The Geometry Dependence Of The mentioning

confidence: 83%

Section: Effect Of the Temperature On The Geometry Dependence Of The mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Experimental investigation of the rheological behaviors of polypropylene in a capillary flow

Meng

Kelly

et al. 2016

J of Applied Polymer Sci

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“…9 we show the convexity parameter C Similar to what has been discussed in Refs. [61][62][63], one can use the polarization of the τ in the semileptonic decays B c → J=ψðη c Þτν to probe for NP. The longitudinal (L), transverse (T), and normal (N) polarization components of the τ are defined as…”

Section: W ðθþ ¼mentioning

confidence: 99%

Implications of new physics in the decays Bc→(J/ψ, ηc)τ
Tran
¹
,
Ivanov
²
,
Körner
³

et al. 2018
Phys. Rev. D
84
4
70
1
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We study the semileptonic decays of the B c meson into final charmonium states within the standard model and beyond. The relevant hadronic transition form factors are calculated in the framework of the covariant confined quark model developed by us. We focus on the tau mode of these decays, which may provide some hints of new physics effects. We extend the standard model by assuming a general effective Hamiltonian describing the b → cτν transition, which consists of the full set of the four-fermion operators.We then obtain experimental constraints on the Wilson coefficients corresponding to each operator and provide predictions for the branching fractions and other polarization observables in different new physics scenarios.

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A Raman study on the intracluster interactions of aminothiophenol‐protected Ag₇ clusters—Photo‐assisted N─N coupling reaction of the ligand

Pan

Zhang

Yang

et al. 2020

J Raman Spectroscopy

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We have synthesized Ag 7 nanoclusters via a facile one-pot procedure with p-aminothiophenol (PATP) as the ligand. The chemical component of this Ag 7 cluster is determined to be Ag 7 (C 6 H 6 NS) 7 H + by high-resolution electrospray mass spectrometry, where a few fragment peaks are also observed such as [Ag 7 (C 6 H 6 NS) 4 H 3 Na] + . For this PATP-protected Ag 7 cluster, we have conducted a Raman investigation to probe in the intracluster interactions and find an essentially different Raman feature from that the nascent PATP ligand, pertaining to photo-assistant catalytic conversion of PATP to p,p'-dimercapto azobenzene (DMAB). Utilizing density-functional-theory (DFT) calculations, we have performed natural population analysis, natural bond orbital analysis, and electron density difference analysis to fully demonstrate the intracluster interactions between Ag 7 clusters and the ligand. What is interesting is that the protection ligand PATP helps stabilize the Ag 7 metallic core, and in turn, the metal core Ag 7 catalyzes the protection ligands giving rise to N─N coupling reaction. On this basis, we have proposed a reaction pathway on a basis of DFT calculations to provide further insights into the reaction mechanism of PATP-to-DMAB conversion at the presence of the Ag 7 clusters.

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Charged-Higgs on $$R_{D^{(*)}}$$ R D ( ∗ ) , $$\tau $$ τ polarization, and FBA

Cited by 63 publications

References 57 publications

Experimental investigation of the rheological behaviors of polypropylene in a capillary flow

Experimental investigation of the rheological behaviors of polypropylene in a capillary flow

Implications of new physics in the decays Bc→(J/ψ, ηc)τ
Tran
¹
,
Ivanov
²
,
Körner
³

et al. 2018
Phys. Rev. D
84
4
70
1
View full text Add to dashboard Cite

A Raman study on the intracluster interactions of aminothiophenol‐protected Ag₇ clusters—Photo‐assisted N─N coupling reaction of the ligand

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Charged-Higgs on $$R_{D^{(*)}}$$ R D ( ∗ ) , $$\tau $$ τ polarization, and FBA

Cited by 63 publications

References 57 publications

Experimental investigation of the rheological behaviors of polypropylene in a capillary flow

Experimental investigation of the rheological behaviors of polypropylene in a capillary flow

Implications of new physics in the decays Bc→(J/ψ, ηc)τTran1, Ivanov2, Körner3 et al. 2018Phys. Rev. D844701View full textAdd to dashboardCite

A Raman study on the intracluster interactions of aminothiophenol‐protected Ag7 clusters—Photo‐assisted N─N coupling reaction of the ligand

Contact Info

Product

Resources

About

Implications of new physics in the decays Bc→(J/ψ, ηc)τ
Tran
¹
,
Ivanov
²
,
Körner
³

et al. 2018
Phys. Rev. D
84
4
70
1
View full text Add to dashboard Cite

A Raman study on the intracluster interactions of aminothiophenol‐protected Ag₇ clusters—Photo‐assisted N─N coupling reaction of the ligand