A5101963147- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Industrial Technology and Control Systems
- Metallurgy and Material Forming
- Advanced Sensor and Control Systems
- Manufacturing Process and Optimization
- Hydraulic and Pneumatic Systems
- Neutrino Physics Research
- Particle Accelerators and Free-Electron Lasers
- Mechanical Engineering and Vibrations Research
- Advanced Algorithms and Applications
- Metal Forming Simulation Techniques
- Advanced machining processes and optimization
- Iterative Learning Control Systems
- Engineering Structural Analysis Methods
- Particle Detector Development and Performance
- Simulation and Modeling Applications
- Industrial Automation and Control Systems
- Geoscience and Mining Technology
- Mechanical Failure Analysis and Simulation
- Advanced Surface Polishing Techniques
- solar cell performance optimization
- Control Systems in Engineering
- Radiation Detection and Scintillator Technologies
Sichuan University
2024
Central South University
2006-2023
Hunan Institute of Engineering
2010-2013
Kunming Medical University
2013
Liaoning University of Technology
2011-2012
Hangzhou Vocational and Technical College
2007-2011
University of Mississippi
1992-2002
Tung Fang Design Institute
2001
Benemérita Universidad Autónoma de Puebla
1996-2000
Fermi National Accelerator Laboratory
1998
We present the first direct measurements of pion valence-quark momentum distribution which is related to square light-cone wave function. The were carried out using data on diffractive dissociation $500\mathrm{GeV}/c$ ${\ensuremath{\pi}}^{\ensuremath{-}}$ into dijets from a platinum target at Fermilab experiment E791. results show that $|q\overline{q}〉$ asymptotic function describes well for ${Q}^{2}\ensuremath{\sim}10(\mathrm{GeV}/c{)}^{2}$ or more. also measured transverse dijets.
We have studied the diffractive dissociation into dijets of 500 GeV/c pions scattering coherently from carbon and platinum targets. Extrapolating to asymptotically high energies (where t(min)-->0), we find that when per-nucleus cross section for this process is parametrized as sigma = sigma0Aalpha, alpha has values near 1.6, exact result depending on jet transverse momentum. These are in agreement with those predicted by theoretical calculations color-transparency.
We report results of the first search for pentaquark P_{{c bar}s} which is predicted to be a doublet states: P^0_{{c bar}s}=({c bar} s u d) and P^-_{{c d u). A was made decay --> phi,pi,p in data from Fermilab experiment E791, 500 GeV/c pi^- beam interacted with nuclear targets. present upper limits at 90% confidence level ratio cross section times branching fraction this that D_s phi,pi. The are 0.031 0.063 M(P^0_{{c bar}s}) = 2.75 2.86 GeV/c^2, respectively, assuming lifetime 0.4 ps.
This paper presents measurements of the production Ds- mesons relative to Ds+ as functions x_F and square p_t for a sample 2445 Ds decays phi pi. The were produced in Fermilab experiment E791 with 500 GeV/c pi- incident on one platinum four carbon foil targets. acceptance-corrected integrated asymmetry range -0.1 0.5 Ds+- is 0.032 +- 0.022 0.022, consistent no net asymmetry. results, p_t, are compared predictions large observed D+- same experiment. These comparisons support hypothesis that...
We report results of a search for flavor-changing neutral current (FCNC), lepton flavor, and lepton-number violating decays the ${D}^{0}$ (and its antiparticle) into three four bodies. Using data from Fermilab charm hadroproduction experiment E791, we examine modes with two leptons (muons or electrons) ${\ensuremath{\rho}}^{0}$, ${\overline{K}}^{*0}$, $\ensuremath{\varphi}$ vector meson nonresonant $\ensuremath{\pi}\ensuremath{\pi}$, $K\ensuremath{\pi}$, $\mathrm{KK}$ pair pseudoscalar...
We present a measurement of the form-factor ratios rV=V(0)/A1(0) and r2=A2(0)/A1(0) for decay D+→K¯*0e+νe. The is based on signal approximately 3000 D+→K¯*0e+νe, K¯*0→K−π+ decays reconstructed in data from charm hadroproduction experiment E791 at Fermilab. results are rV=1.84±0.11±0.08 r2=0.71±0.08±0.09.Received 1 October 1997DOI:https://doi.org/10.1103/PhysRevLett.80.1393©1998 American Physical Society
We report results of a search for CP violation in the singly Cabibbo-suppressed decays D+ → K−K+π+, φπ+, K∗(892)0K+, and π−π+π+ based on data from charm hadroproduction experiment E791 at Fermilab. difference D− decay rates each final states. No evidence is seen. The rate asymmetry parameters (ACP), defined as divided by sum rates, are measured to be: ACP(KKπ) = −0.014±0.029, ACP(φπ) −0.028±0.036, ACP(K∗(892)K) −0.010±0.050 ACP(πππ) −0.017±0.042.
We report the results of a search for flavor-changing neutral-current decays $D^+\rightarrow \pi^+ \mu^+ \mu^-$ and e^+ e^-$ in data from Fermilab charm hadroproduction experiment E791. No signal above background is found, we obtain upper limits on branching fractions, $B(D^+\rightarrow \mu^-) < 1.8 \times 10^{-5}$ e^-) 6.6 10^{-5}$, at 90\% confidence level.
The form factor ratios rV=V(0)/A1(0), r2=A2(0)/A1(0) and r3=A3(0)/A1(0) in the decay D+→K★0ℓ+νℓ, K★0→K−π+ have been measured using data from charm hadroproduction experiment E791 at Fermilab. From 3034 (595) signal (background) events muon channel, we obtain rV=1.84±0.11±0.09, r2=0.75±0.08±0.09 and, as a first measurement of r3, find 0.04±0.33±0.29. values rV r2 for channel are combined with that electron channel. results channels rV=1.87±0.08±0.07 r2=0.73±0.06±0.08.
With the development of lightweight car，the applications aluminum alloy wheels are changed extensively. At present, there many disadvantages in wheel profession my country such as blindness design, long period, material consumption, high cost and so on. In this paper, CAD well FEA technology is applied. The parametric three-dimensional model constructed using UG software. Taken former's thickness angle between two formers variables, with different sizes shapes established. Automobile hub...
Using data from Fermilab fixed-target experiment E791, we measure the branching ratio for D0→K−K+π−π+ and its resonant components. We find Γ(D0→K−K+π−π+)Γ(D0→K−π+π−π+)=(3.13±0.37±0.36)%. A coherent amplitude analysis is used to estimate ratios Γ(D0→f)Γ(D0→K−π+π−π+) be (2.0±0.9±0.8)% f=φρ0, (0.9±0.4±0.5)% f=φπ+π−, <2.0% at 90% CL f=K∗0(892)K∗0(892), <1.0% f=K∗0(892)K+π− or K∗0(892)K−π+.
In this paper, the cycloid bearing type of connection structure for giant die forging hydraulic press's movable beam eccentric torque test system are put forward to compare static comprehensive error with original slider structure. Through MAC finite-element model analysis, mode and vibration simultaneous balance detection bracket obtained. The results show that proposed is superior one.
Hollow zinc/cobalt/carbon(Zn/Co/C) composites are obtained through encapsulation and etching of tannins carbonization processes. When the temperature is 600 ℃, Zn/Co/C shows efficient electromagnetic (EM) wave absorption properties. The maximum reflection loss (RL) reaches -57.6 dB at 9.4 GHz with a thickness 3.5 mm. 2.6 mm, effective bandwidth (EAB) 6.75 (10.54-17.29 GHz). excellent performance attributed to abundant dielectric magnetic effects. results have positive significance for...