检索结果-南通市图书馆

Ground State Meson Spectrum in a Relativistic Model with Instanton Induced Interaction

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2010年第2期53卷 325-330页

作者： Antony Prakash Monteiro k.b.vijaya kumar Department of Physics Mangalore University

The mass spectrum of the S-wave mesons is considered in the frame work of relativistic harmonic model （RHM）. The full Hamiltonian used in the investigation has the Lorentz scalar plus a vector harmonic-oscillator potential, the confined-one-gluon-exchange potential （COGEP） and the instanton-induced quark-antiquak interaction （Ⅲ）. A good description of the mass spectrum is obtained. The respective role of Ⅲ and COGEP in the S-wave meson spectrum is discussed.

关键词： quark model confined-one-gluon-exchange potential instanton induced interaction S-wave spectra

Light meson spectrum and their leptonic decay widths in the frame work of constituent quark models

在线全文

学校读者我要写书评

暂无评论

Chinese Physics C 2010年第9期34卷 1396-1398页

作者： k.b.vijaya kumar Antony Prakash Monteiro Department of Physics Mangalore University

The phenomenological non-relativistic quark model has been employed to obtain the ground state masses of light vector mesons and their radially excited states and their decay *** full hamiltonian used in the investigation has kinetic energy,the confinement potential and the one-gluon-exchange potential.A good agreement is obtained with the experimental masses and their leptonic decay widths.

关键词： meson spectrum leptonic decay width constituent quark model OGEP

bottomonium Spectrum and Decays with One Gluon Exchange Potential

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2011年第9期56卷 476-480页

作者： Antony Prakash Monteiro k.b.vijaya kumar bhaghyesh Department of Physics Mangalore UniversityMangalagangotriMangalore 574199India

The phenomenological non-relativistic quark model （NRQM） has been employed to obtain the masses of bottomonium states. In the frame work of NRQM an exhaustive study of radiative and leptonic decays has been made. The Hamiltonian used in the investigation has kinetic energy, confinement potentiM and one gluon exchange potential （OGEP）. An overall agreement is obtained with the experimental masses and decay widths.

关键词： quark model one gluon exchange potential bottomonium states leptonic and radiative decays

Properties of Charmonium States in a Phenomenological Approach

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2019年第2期71卷 192-202页

作者： Praveen P D’Souza Antony Prakash Monteiro k.b.vijaya kumar Department of Physics St Philomena College Department of Physics Mangalore University

We investigate the spectrum and decay rates of charmonium states within the framework of the non relativistic quark model by employing a Coulomb like potential from the perturbative one gluon exchange and the linear confining potential along with the potential derived from instanton vacuum to account for the hyperfine mass splitting of charmonium states in variational approach. We predict radiative E1, M1, two-photon, lepton and two-gluon decay rates of low lying charmonium states. An overall agreement is obtained with the experimental masses and decay *** have estimated the branching ratio of two gluons decaying into light hadrons.

关键词： non-relativistic quark model instantons charmonium radiative decay two gluon decay two photon decay leptonic decay branching ratio

Charmonium Spectrum and Their Transitions in Relativistic Quark Models

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2011年第6期55卷 1044-1048页

作者： bhaghyesh k.b. vijaya kumar Department of Physics Mangalore UniversityMangalagangotriMangalore 574 199India

Using the phenomenological relativistic harmonic model （RHM） for quarks, we have obtained the masses of S wave charmonium states. The full Hamiltonian used in the investigation has Lorentz scalar plus vector confinement potential, along with the confined one gluon exchange potential （COGEP）. A good agreement with the experimental masses for the ground state and the radially excited states is obtained for both the triplet and singlet S wave mesons. The calculated charge radii, meson decay constants, leptonic decay width, two photon decay width, and the radiative M1 decay width are in good agreement with the experimental results.

关键词： quark model confined-one-gluon-exchange potential S-wave charmonium states charge radii decay constants Leptonic two photon and radiative decays

Heavy quarkonia spectra and their decays in a relativistic quark model

在线全文

学校读者我要写书评

暂无评论

Chinese Physics C 2011年第11期35卷 997-1003页

作者： bhaghyesh k. b. vijaya kumar Antony Prakash Monteiro Department of Physics Mangalore University

Using the phenomenological relativistic harmonic model （RHM） for quarks, we have obtained the masses of S wave charmonium and bottomonium states. The full Hamiltonian used in the investigation has Lorentz scalar plus vector confinement potential, along with the confined one gluon exchange potential （COGEP）. A good agreement with the experimental masses for the ground and the radially excited states is obtained both for the triplet and singlet S wave mesons. The decay properties of the ground state charmonium and bottomonium are investigated.

关键词： relativistic harmonic model confined one gluon exchange potential S-wave spectrum decay rates

Effect of confined one-gluon-exchange potential and instanton-induced interaction on nucleon–nucleon interaction

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2020年第6期72卷 83-88页

作者： S Raghavendra C Vanamali Shastry V k Nilakanthan k.b.vijaya kumar Department of Physics Mangalore UniversityMangalagangotri 574199India Department of Post-Graduate Studies in Physics SDM CollegeUjire 574240India Department of Education in Science and Mathematics Regional Institute of Education MysoreMysuru 570006India Department of Post Graduate Studies in Physics St.Aloysius College(Autonomous)Mangalore 575003India

The effect of confined one-gluon-exchange potential and instanton-induced interaction potential in the singlet(1S0)and triplet(3S1)channels for nucleon–nucleon interaction has been investigated in the framework of the relativistic harmonic model using the resonating group method in the adiabatic limit with the born–Oppenheimer *** contributions of the different components of the interaction potentials have been analyzed.

关键词： nucleon–nucleon interaction relativistic harmonic model instanton-induced interaction resonating group method confined one-gluon-exchange

Nano-Enhanced Dairy Scum biodiesel blends:Unleashing the Power of Aluminium Oxide for Sustainable and Efficient Engine Performance

在线全文

学校读者我要写书评

暂无评论

Journal of Thermal Science 2025年第1期 283-302页

作者： Veeranna MODI Prasad b.RAMPURE Sunil kumar SHETTY Madeva NAGARAL Channa keshava NAIk N Johar MGM Muhammad Irsyad AbDULLAH Abdullah I.AL-MANSOUR Shamshad ALAM kLE College of Engineering and Technology ChikodiVisvesvaraya Technological University Nitte (Deemed to be University) NMAM Institute of Technology (NMAMIT)Department of Mechanical Engineering Aircraft Research and Design Centre HAL Department of Mechanical Engineering BGS College of Engineering and TechnologyBengaluruAffiliated to Visvesvaraya Technological University Management and Science University Department of Civil Engineering College of EngineeringKing Saud University

This study investigates the effect of aluminium oxide nanoparticlesaddition to biodiesel blends made from dairy milk scum on performance and combustion characteristics of the diesel *** dispersion of Al2O3nanoparticles in b20 blends at different concentrations was done with the help of *** number of blends were prepared for the *** Machine learning algorithms(Random Forest（RF）and Catboost) was used for the *** results show that in comparison to biodiesel blends without nanoparticles,the kinematic viscosity and density is higher for fuel blends with *** these Fuel blends have higher calorific *** blends exhibited reduced brake Specific Fuel Consumption（bSFC） of2.85% than the blends without nano particles(Dairy Scum Methyl Ester biodiesel 20%+Neat Diesel 80%（in volume）,DSMEb20),57.14% less CO,40.8% less hydrocarbon,and increased NOxemissions compared to conventional diesel,contributing to the development of environmentally friendly and renewable biofuel blends with *** b20NP30 is the optimal blend for performance and emission *** study concludes with findings on enhanced brake Thermal Efficiency（bTE） of 26.29% in 3×10-5（in volume） Al2O3nanoparticle-blended DSME b20 and other DSME b20 fuel blends,emphasizing the importance of optimal nanoparticle *** correlation matrix shows how engine load,efficiency measures（bTE,bSFC）,and emissions（CO,CO2,NOx,Smoke） are connected in complex *** results help us understand the complicated dynamics of engine performance and emission characteristics ***'s diagram for bTE and bSFC shows that Catboost-based bTE models perform superior to RF-based models during the training as well as testing *** results were obtained for CO and CO2emission results.

关键词：

Influence of process parameters on physical dimensions of AA6063 aluminium alloy coating on mild steel in friction surfacing

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Defence Technology（防务技术） 2015年第3期11卷 275-281页

作者： b.vijaya kumar G.MADHUSUDHAN REDDY T.MOHANDAS Department of Mechanical Engineering Guru Nanak Institute of Technology Defence Metallurgical Research Laboratory Department of Mechanical Engineering Nalla Malla Reddy Engineering College

An attempt is made in the present study to obtain the relationships among process parameters and physical dimensions of AA6063 aluminium alloy coating on IS2062 mild steel obtained through friction surfacing and their impact on strength and ductility of the coating. Factorial experimental design technique was used to investigate and select the parameter combination to achieve a coating with adequate strength and ductility. Spindle speed, axial force and table traverse speed were observed to be the most significant factors on physical dimensions. It was observed that the thickness of the coating decreased as the coating width increased. In addition, the width and thickness of the coatings are higher at low and high torques. At intermediate torque values, when the force is high, the width of the coating is high, and its thickness is thin; and when the force is low, the width and thickness are low. The interaction effect between axial force(F)-table traverse speed(Vx) and spindle speed(N)-table traverse speed(Vx) produced an increasing effect on coating width and thickness, but other interactions exhibited decreasing influence. It has also been observed that sound coatings could be obtained in a narrow set of parameter range as the substrate-coating materials are metallurgically incompatible and have a propensity to form brittle intermetallics.

关键词：合金涂层摩擦表面尺寸物理工艺参数碳钢涂层厚度试验设计技术