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Minimal flavored U(1)′ for B -meson anomalies
Bian, Ligong,Choi, Soo-Min,Kang, Yoo-Jin,Lee, Hyun Min American Physical Society 2017 Physical Review D Vol.96 No.7
<P>We consider an anomaly free U(1)' model with favorable couplings to heavy flavors in the Standard Model ( SM), as motivated by B- meson anomalies at LHCb. Taking the U(1)' charge to be Q' = y(L mu - L tau) + x(B-3 - L-3), we can explain theB- meson anomalies without invoking extra charged fermions or flavor violation beyond the SM. We showthat there is a viable parameter space with a small x that is compatible with other meson decays, tau lepton, and neutrino experiments as well as theLHCdimuon searches. We briefly discuss the prospects of discovering the Z' gauge boson at the LHC in the proposed model.</P>
Bian, Jin Long,Seo, Yong Jun,Kim, Geun Woo,Sung, Chang Hoon,Kumar, Shalendra,Lee, Chan Gyu,Koo, Bon Heun Elsevier 2011 CURRENT APPLIED PHYSICS Vol.11 No.1
<P><B>Abstract</B></P><P>Composites of 0.99La<SUB>0.7</SUB>(Ca<SUB><I>x</I></SUB>Sr<SUB>1–<I>x</I></SUB>)<SUB>0.3</SUB>MnO<SUB>3</SUB>/0.01SnO<SUB>2</SUB> (LCSMO/SnO<SUB>2</SUB>) (<I>x</I> = 0, 0.1, 0.2, 0.5, 0.7 and 1) were synthesized using solid-state reaction technique, and then characterized using the X-ray diffraction (XRD) and scanning electron microscopy (SEM). The XRD and SEM observations show the LCSMO and SnO<SUB>2</SUB> phases are separately distributed in the composites which indicate that there was no chemical interaction occurred during the sintering process. SnO<SUB>2</SUB> is mainly distributed at the grain boundaries and surfaces of the matrix. The resistivity of the composites was measured in the range of 100–350 K by using physical properties measurement system (PPMS). The applied magnetic field is 0T, 0.5T and 1T. Enhanced magnetoresistance (MR) within a wide temperature range was obtained. The observed variation of MR with varying Ca and Sr concentration has been qualitatively investigated.</P> <P><B>Highlights</B></P><P>► Low field magnetoresistance has potential application in highspeed electronic, magnetic and recording devices, etc. ► SnO<SUB>2</SUB> influence the electric and magnetic properties of the manganites composites. ► Enhanced room temperature magnetoresistance at low magnetic field.</P>
In Vitro and In Vivo Studies of Topical Delivery System of Gentisic Acid in Hairless Mice
Bian, ShengJie,Zheng, JunMin,Kim, Jung-Sun,Choi, Myeong Jun,Chung, Ho-Kwon,Lee, Chi-Ho,Kim, Dae-Duk 한국약제학회 2002 Journal of Pharmaceutical Investigation Vol.32 No.3
Gentisic acid is a skin-whitening agent which inhibits the tyrosinase activity, an essential enzyme in the process of biological synthesis of melanin. Since melanin is synthesized in melanocytes located between the viable epidermis and dermis layer, drug amount delivered into the epidermis/dermis layer can provide valuable information for the biological effect of skin-whitening agents. The purpose of this study was to prepare the gentisic acid patches with 2% dodecylamine as enhancer, and to observe the in vitro skin permeation and in vivo skin deposition of gentisic acid. Gentisic acid in Duro-Tak 87-2510 patch formulation permeated across hairless mouse skin at the rate of 40.79㎍/㎠/hr. In vivo study showed that the gentisic acid amount in both the stratum corneum and the viable epidermis/dermis increased with the increase of application time. The amount of gentisic acid in the stratum corneum was higher than that in the epidermis/dermis layer, and was expected to provide a reservoir effect even after removing the patches. Thus, the patch formulation seems to be useful for the topical delivery of ski-whitening agent into the epidermis/dermis layer, the target site.
Bending and free vibration analysis of a smart functionally graded plate
Bian, Z.G.,Ying, J.,Chen, W.Q.,Ding, H.J. Techno-Press 2006 Structural Engineering and Mechanics, An Int'l Jou Vol.23 No.1
A simply supported hybrid plate consisting of top and bottom functionally graded elastic layers and an intermediate actuating or sensing homogeneous piezoelectric layer is investigated by an elasticity (piezoelasticity) method, which is based on state space formulations. The general spring layer model is adopted to consider the effect of bonding adhesives between the piezoelectric layer and the two functionally graded ones. The two functionally graded layers are inhomogeneous along the thickness direction, which are approached by laminate models. The effect of interlaminar bonding imperfections on the static bending and free vibration of the smart plate is discussed in the numerical examples.
CP violation effects in the diphoton spectrum of heavy scalars
Bian, Ligong,Chen, Ning,Zhang, Yongchao American Physical Society 2017 Physical Review D Vol.96 No.9
<P>In a class of new physics models, an extended Higgs sector and new CP-violating sources are simultaneously present in order to explain the baryon asymmetry in the Universe. The aim of this work is to study the implications of beyond the Standard Model (SM) CP violation for the searches of heavy scalars at the LHC. In particular, we focus on the diphoton channel searches in the CP-violating two-Higgs-doublet model (CPV 2HDM). To have a sizable CPV in the scalar sector, the two heavy neutral scalars in 2HDM tend to be nearly degenerate. The theoretical constraints of unitarity, perturbativity and vacuum stability are considered, which requires that the heavy scalars M-H less than or similar to 1 TeV in a large region of the parameter space. The experimental limits are also taken into account, including the direct searches for heavy neutral scalars in the final state of the SM h, W and Z bosons; the differential (tt) over bar data; those from the charged scalar sector which is implied by the oblique T parameter; and the precise measurements of the electric dipole moments of electrons and mercury. The quantum interference effects between the resonances and the SM background are crucially important for the diphoton signals, and the CPV mixing of the quasidegenerate heavy scalars could enhance significantly the resonance peak. With an integrated luminosity of 3000 fb(-1) at the LHC, almost the whole parameter space of CPV 2HDM could be probed in the diphoton channel, and the CPV could also be directly detected via the diphoton spectrum.</P>
Structural Mechanisms of the Cooling Rate Effect on the Deformation Behaviors in Metallic Glasses
Bian Zhou,Ming‑fei Li,Fan Xiong,Liang Yang 대한금속·재료학회 2021 METALS AND MATERIALS International Vol.27 No.5
In this work, the structural mechanisms of the cooling rate effect on the deformation behaviors in metallic glasses (MGs) isstudied, by performing the synchrotron radiation-based experiments coupled with a series of simulations. It is found that aMG prepared at lower cooling rate has the higher yield strength and is more likely to soften itself, resulting in lower plasticity.This is because some atomic-to-cluster level structural factors, such as coordination numbers, atomic packing efficiencies,cluster concentrations and regularities. In addition, a quantitative analysis reveals that higher cooling rate leads to more freevolumes, and significantly affect the evolution of free volumes during the compressive deformation, tuning the formationand the evolution of shear transformation zones, as well as the yield strength and the plasticity.