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Light-front Approach to Hadron Structure

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IMP & HIRFL Annual Report 2017年第1期 12-14页

作者： Zhao Xingbo chandan mondal 不详

Although Quantum chromodynamics(QCD)has been accepted as the fundamental theory for strong interaction,it remains a curious fact and a longstanding puzzle that strong interaction exhibits distinct pictures at different energy regimes:at high energy the particles behave as bound states consisting of quarks and gluons(partons)interacting through the fundamental QCD interactions,whereas at low energy protons and neutrons(nucleons)become the relevant degrees of freedom and they interact via the effective nucleon-nucleon interactions.

关键词： interaction quark QCD

Light Meson PDFs from BLFQ and QCD Evolution

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IMP & HIRFL Annual Report 2018年第1期 25-26页

作者： Lan Jiangshan mondal chandan Xu Siqi Zhao Xingbo 不详

The basis light front quantization(BLFQ)is a nonperturbative approach for the light front wavefunctions(LFWFs)and the spectroscopy of the many body bound-state systems in quantum field theories[1−3].It is a Hamiltonian-based formalism with the advantages of light front dynamics[4].The LFWFs of the bound states are obtained as the eigenfunctions of the light front Schr¨odinger equation Heff|Ψ>=M2|Ψ>,where Heff is the effective Hamiltonian of the system.

关键词： Hamiltonian light quantum

A Study of the Pion from BLFQ

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IMP & HIRFL Annual Report 2019年第1期 13-14页

作者： Lan Jiangshan chandan mondal Zhao Hengfei Zhao Xingbo 不详

We study the properties of the pion through the light-front wave function(LFWF)obtained from a basis lightfront quantization(BLFQ)approach[1−4].BLFQ is a nonperturbative approach to quantum field theory based on the H... 详细信息

关键词： Hamiltonian quantum feasible

Proton Structure with Three Dynamical Quarks

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IMP & HIRFL Annual Report 2019年第1期 14-16页

作者： Xu Siqi chandan mondal Lan Jiangshan Zhao Xingbo Li Yang James P.Vary 不详

Basis light-front quantization(BLFQ)as a nonperturbative approach has been successfully applied to QED and QCD systems[1–13].Treating the proton as a system of three dynamical quarks,we adopt a light-front effective ... 详细信息

关键词： quark dynamical Dynamical

Exploring Photon Using Basis Light-front Quantization Approach

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IMP & HIRFL Annual Report 2022年第1期 11-11页

作者： Sreeraj Nair chandan mondal Zhao Xingbo Asmita Mukherjee James P.Vary 不详

The distinctive characteristic of the photon is that its partonic content can be calculated using leading-order perturbative QED^([1,2]).While our understanding of the photon's parton distributions(PDFs)is now well-established both theoretically and experimentally^([3]),we have less knowledge about its Generalized Parton Distributions(GPDs)and Transverse Momentum Dependent distributions(TMDs).

关键词： photon characteristic

Angular Momentum and Generalized Parton Distributions for the Proton with Basis Light-front Quantization

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IMP & HIRFL Annual Report 2022年第1期 10-10页

作者： Liu Yiping Xu Siqi chandan mondal Zhao Xingbo James Vary 不详

We study the properties of the proton through the light-front wave function(LFWF)obtained from a basis light-front quantization(BLFQ)*** is a nonperturbative approach to quantum eld theory based on the Hamiltonian ***... 详细信息

关键词： Hamiltonian quantum feasible

Transverse Momentum Structure of Proton within the Basis Light-front Quantization Framework

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IMP & HIRFL Annual Report 2022年第1期 9-9页

作者： Hu Zhi Xu Siqi chandan mondal Zhao Xingbo James P.Vary Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000China School of Nuclear Physics University of Chinese Academy of SciencesBeijing 100049China CAS Key Laboratory of High Precision Nuclear Spectroscopy Institute of Modern PhysicsChinese Academy of SciencesLanzhou 730000China Department of Physics and Astronomy Iowa State UniversityAmesIA 50011USA

We obtain the leading-twist valence quark transverse-momentum-dependent parton distribution functions(TMD PDFs)of quarks in the proton within the basis light-front quantization(BLFQ)*** results are consistent with lattice QCD calculations and the previous BLFQ calculations of the collinear *** also obtain consistency with the So er-type *** our approach,we nd that six T-even TMDs in the leading twist are all independent of each other,and previously found model-dependent relations do not *** is a promising sign that our results are representative of future,more extensive treatments of QCD(Fig.1).

关键词： quark twist bounds

Potential antibacterial activity of berberine against multi drug resistant enterovirulent Escherichia coli isolated from yaks(Poephagus grunniens) with haemorrhagic diarrhoea

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Asian Pacific Journal of Tropical Medicine 2013年第4期6卷 315-319页

作者： Samiran Bandyopadhyay Pabitra H Patra Achintya Mahanti Dipak K mondal Premanshu Dandapat Subhasis Bandyopadhyay Indranil Samanta chandan Lodh Asit K Bera Debasish Bhattacharyya Mihir Sarkar Kishore K Baruah Indian Veterinary Research Institute Eastern Regional Station37Belgachia RoadKolkata-37 National Research Centre on Yak ICARDirang-790101West KamengArunachal Pradesh West Bengal University of Animal and Fishery Sciences 37 Belgachia RoadKolkata-37 Department of Pharmacology and Toxicology College of Veterinary Sciences and AHR.K.NagarAgartala-799008Tripura West Bengal University of Animal and Fishery Sciences37 Belgachia RoadKolkata-37

Objective:To evaluate the antimicrobial efficacy of berberine,a plant ***:Five multi-drug resistant（MDR） STEC/EPEC and five MDR ETEC isolates from yaks with haemorrhagic diarrhoea were selected for the *** activity of berberine was evaluated by broth dilution and disc diffusion *** binding kinetics of berberine to DNA and protein was also ***:For both categories of enterovirulent Escherichia coli（***） isolates, berberine displayed the antibaclerial effect in a dose dependent *** MIC50 of berberine chloride for STEC/EPEC isolates varied from 2.07μM to 3.6μM with a mean of（2.95±0.33）μM where as for ETEC strains it varied from 1.75 to 1.96μM with a mean of（1.87±0.03）μM. Berberine bind more tightly with double helix DNA with Bmax and Kd of（24.68±2.62） and（357.8±57.8）,*** reacted with protein in comparatively loose manner with Bmax and Kd of（18.9±3.83） and <286.2±113.6),***:The results indicate clearly that berberine may serve as a good antibacterial against multi drug resistant ***.

关键词： Berberine Multidrug resistant enterovirulent Escherichia coli Haemorrhagic diarrhoea Antibacterial activity Yak

Microwave Preparation of SiO2-B2O3-Na2O-K2O-CaO-Fe2O3-TiO2 Glass System

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Journal of Chemistry and Chemical Engineering 2014年第4期8卷 349-357页

作者： Ashis Kumar Manda Prasanta Kumar Sinha Santanu Sen Sitendu mondal chandan Guha Ranjan Sen CSIR-Central Glass and Ceramic Research Institute Kolkata 700032 India Department of Chemical Engineering Jadavpur Unirversity Kolkata 700032 India

This study reports preparation of glass composition （54.50 wt.%） SiO2, （10.80 wt.%） B2O3, （14.20 wt.%） Na2O, （1.20 wt.%） K2O, （6.00 wt.%） CaO, （4.00 wt.%） Fe2O3 and （9.30 wt.%） TiO2 by melt quenching method using direct microwave heating and conventional resistive heating. Study of dielectric loss factor of the glass as function of temperature illustrated increasing loss factor above 370 ℃, 550 ℃, 650 ℃ and 900 ℃, indicating enhanced microwave absorption by the glass at above these temperatures. Chemical analysis results of both the glasses depicted more volatilization loss of volatile ingredients in conventional heating. The study of chemical durability was performed from leachate analysis describing less leaching of Na2O, K2O and other constituents from glass melted in microwave furnace. Glass transition temperatures （Tg） were found to be 576.3 ℃ and 569.5 ℃ for glass melted in conventional and microwave heating route, respectively. Laboratory experiment of glass melting utilizing microwave energy as an alternate heating source demonstrated 70%-75% electrical power saving.

关键词： Microwave heating energy efficient glass melting dielectric constant loss factor chemical durability.