检索结果-南通市图书馆

Decay properties of D and D_s mesons in coulomb plus power potential (CPP_ν)

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 1497-1499页

作者： B.Patel P.C.Vinodkumar LDRP- Institute of Technology and Research Department of Physics Sardar Patel University

The decay properties of the D and D s mesons are computed in a nonrelativistic phenomenological quark-antiquark potential of the type V （r） =-4 /3 α s /r＋ Ar ν with different choices of ν.Numerical method to solve the Schrdinger equation has been used to obtain the spectroscopy of qQ *** numerically obtained radial solutions are employed to obtain the decay constant and leptonic decay *** has been observed that predictions of the ground state masses and the decay widths are consistent with other model predictions as well as with the known experimental values.

关键词： open charm mesons potential models leptonic decay widths

Decay rates of charmonia within a quark-antiquark confining potential

在线全文

学校读者我要写书评

暂无评论

Chinese Physics C 2016年第5期40卷 14-23页

作者： Smruti Patel P.C.Vinodkumar Shashank Bhatnagar Department of Physics Sardar Patel University Department of Physics Addis Ababa University

In this work, we investigate the spectroscopy and decay rates of charmonia within the framework of the non-relativistic SchrSdinger equation by employing an approximate inter quark-antiquark potential. The spin hyperfine, spin-orbit and tensor components of the one gluon exchange interaction are employed to compute the spectroscopy of the excited S states and a few low-lying P and D waves. The resultant wave functions at zero inter- quark separation as well as some finite separations are employed to predict the di-gamma, di-leptonic and di-gluon decay rates of charmonia states using the conventional Van Royen-Weisskopf formula. The di-gamma and di-leptonic decay widths are also computed by incorporating the relativistic corrections of order v4 within the NRQCD formalism. We have observed that the NRQCD predictions with their matrix elements computed at finite radial separation yield results which are found to be in better agreement with experimentM values for both di-gamma and di-leptonic decays. The same scenario is seen in the case when di-gamma and di-leptonic decay widths are computed with the Van Royen- Weisskopf formula. It is also observed that the di-gluon decay width with the inclusion of binding energy effects are in better agreement with the experimental data available for 1S-2S and 1P. The di-gluon decay width of 3S and 2P waves waves are Mso predicted. Thus, the present study of decay rates clearly indicates the importance of binding energy effects.

关键词： potential models heavy quarkonia radiative decays non relativistic quark model

Binding energy effects in the decay properties of charmonia

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 1411-1413页

作者： P.C.Vinodkumar Bhavin Patel Department of Physics Sardar Patel University LDRP-Institute of Technology and Research

The di-gamma and di-gluon decay widths of P-wave cc mesons are computed in nonrelativistic phenomenological quark-antiquark potential of the type V （r） =-4 3 α s r＋ Ar ν with different choices of ν using spectroscopic *** numerically obtained radial solutions are employed to obtain the di-gamma and di-gluon decay *** computed decay widths are consistent with other model predictions as well as with the known experimental values in the range of potential index 0.7 ≤ ν ≤ 1.1.

关键词： charmonia potential models decay widths P -waves

Role of Bound States in Channel-Interference of Harmonic Generation

在线全文

学校读者我要写书评

暂无评论

Wuhan University Journal of Natural Sciences 2011年第2期16卷 161-166页

作者： CAO Hui CAI Jun QIAO Haoxue School of Physics and Technology Wuhan University Wuhan430072 Hubei China

We calculated the power spectra of harmonic generation for the one-electron system in 7 potential models with different quantities of bound states. It indicates that the increase of weakly bound states has little influence on the enhancement of harmonic intensity in the high-order region. Further research on the so-called channel-interference of harmonic generation is obtained, which shows that the channel-interference of harmonic generation exists for all potential models. Therefore, channel-interference maybe a ubiquitous phenomenon for one-electron system driven by bichromatic field, and the increase of bound states can augment the effect of channel-interference. Our calculations can provide some insight on the mechanism of channel-interference and harmonic generation.

关键词： harmonic generation channel-interference bound states potential models

Ground State Nucleon, Dark Energy and Dark Matter

在线全文

学校读者我要写书评

暂无评论

Journal of Applied Mathematics and Physics 2016年第4期4卷 711-719页

作者： Gintautas P. Kamuntavičius Vytautas Magnus University Kaunas Lithuania

The recently introduced model of the nucleon as a system of three point particles predicts all characteristics of the proton and neutron with experimental precision only at condition that nucleon is the loosely bound state in system of deep potential wells. The model’s Hamiltonian contains ground state with the same parity and spin as the nucleon but with other different characteristics. Existence of this ground state nucleon means that the visible Universe is composed of excited matter. The direct transition between excited and ground states is strictly forbidden, however, stimulated emission can ignite such process. Most likely, corresponding conditions realize at supernova explosion. It is shown that presence of this matter, composed of ground state nucleons, in Universe gives the chance for consistent explanation of dark matter and dark energy phenomena.

关键词： Solutions of Wave Equations (Bound States) potential models Proton and Neutron Dark Matter Dark Energy

Structure of Schrodinger’s Nucleon:Elastic Form-Factors and Radii

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Applied Mathematics and Physics 2015年第10期3卷 1352-1360页

作者： Gintautas P.Kamuntavicius Vytautas Magnus University KaunasLithuania

The Galilei invariant model of the nucleon as a system of three point particles, whose dynamics is governed by Schr?dinger equation, after six Hamiltonian parameters fitting, predicts magnetic momenta, masses and charge radii of the proton and neutron with experimental precision. Now this model is applied in order to investigate nucleon charge, mass and magnetism distributions. The obtained electric and magnetic form factors at low values of momentum transfer are in satisfactory agreement with experimental information. The model predicts that neutron is a more compact system than proton.

关键词： Solutions of Wave Equations(Bound States) potential models Proton and Neutron

Structure of Schrodinger’s *** Distributions and Zemach Momenta

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Applied Mathematics and Physics 2015年第11期3卷 1412-1421页

作者： Gintautas P.Kamuntavicius Vytautas Magnus University KaunasLithuania

The recently introduced Galilei invariant model of the nucleon as a system of three point particles, whose dynamics is governed by Schr?dinger equation, is applied for nucleon structure investigation. The obtained charge, magnetism, mass and point particles density distributions of the proton and neutron are in satisfactory agreement with known information about nucleon structure. The model predicts the third Zemach momentum of proton larger than the one obtained in dipole approximation and larger than following from electron-proton data analysis.

关键词： Solutions of Wave Equations(Bound States) potential models Proton and Neutron