搜索结果: 1-15 共查到“原子核物理学 pion”相关记录23条 . 查询时间(0.402 秒)
Asymptotic behavior of pion form factors
Vector Meson Dominance Regge behavior dispersion relations
2011/7/21
We consider the electromagnetic and transition pion form factors. Using dispersion relations we simultaneously describe both the hadronic, time-like region and the asymptotic region of large energy-mo...
Deciphering non-femtoscopic two-pion correlations in $p+p$ collisions with simple analytical models
non-femtoscopic two-pion analytical models
2011/7/21
A simple model of non-femtoscopic particle correlations in proton-proton collisions is proposed.
$Z_b(10610)$ and $Z_b(10650)$ structures produced by the initial single pion emission in the $Υ(5S)$ decays
$Z_b(10610)$ $Z_b(10650)$ initial single pion emission
2011/7/21
We propose an unique mechanism called {\it Initial Single Pion Emission} existing in the $\Upsilon(5S)$ decays, and further study the line shapes of $d\Gamma(\Upsilon(5S\to \Upsilon(nS)\pi^+\pi^-))/dm...
Single Spin Asymmetries in Charged Pion Production from Semi-Inclusive Deep Inelastic Scattering on a Transversely Polarized $^3$He Target
Transversely Polarized $^3$He Target Charged Pion Production
2011/7/21
We report the first measurement of target single spin asymmetries in the semi-inclusive $^3{He}(e,e'\pi^\pm)X$ reaction on a transversely polarized target. The experiment, conducted at Jefferson Lab u...
Pion productions by proton and Helium-3 on Au197 target at beam energies of 2.8, 5, 10 and 16.587 GeV/nucleon
GeV/nucleon
2011/7/20
Based on a Relativistic Boltzmann-Uehling- Uhlenbeck transport model, proton and $^{3}$He induced reactions on $^{197}$Au target at beam energies of 2.8, 5, 10 and 16.587 GeV/nucleon are studied.
We consider the electromagnetic and transition pion form factors. Using dispersion relations we simultaneously describe both the hadronic, time-like region and the asymptotic region of large energy-mo...
Deciphering non-femtoscopic two-pion correlations in $p+p$ collisions with simple analytical models
non-femtoscopic two-pion correlations simple analytical models
2011/7/21
A simple model of non-femtoscopic particle correlations in proton-proton collisions is proposed. The model takes into account correlations induced by the conservation laws as well as correlations indu...
近日，中国科学院近代物理研究所原子核理论组研究人员基于自己发展的兰州量子分子动力学(LQMD)模型，对高能重离子碰撞中产生的π介子和奇异粒子(K, ∧和Σ)进行了深入研究。计算结果表明，本模型能够很好地描述介子产额、π-/π+激发函数、横向动量分布等实验观测量，为将来进一步分析兰州CSR上的实验数据提供了理论依据。
近日，中科院近代物理研究所原子核理论组研究人员基于自己发展的兰州量子分子动力学(LQMD)模型，对高能重离子碰撞中产生的π介子和奇异粒子(K, ∧和Σ)进行了深入研究。计算结果表明，本模型能够很好地描述介子产额、π-/π+激发函数、横向动量分布等实验观测量，为将来进一步分析兰州CSR上的实验数据提供了理论依据。
Nucleon, Delta and Omega excited state spectra at three pion mass values
Nucleon Delta Omega excited state spectra three pion mass values
2011/1/13
The energies of the excited states of the Nucleon, D and W are computed in lattice QCD, using
two light quarks and one strange quark on anisotropic lattices. The calculations are performed at three v...
An extension of the TRIUMF M13 low-energy pion channel designed to suppress positrons based on an energy-loss technique is described. A source of beam channel momentum calibration from the decay pi+ -...
Forward pion-nucleon charge exchange reaction and Regge constraints
pion-nucleon interaction Regge model
2009/11/24
We present our recent study of pion-nucleon charge exchange amplitudes above 2 GeV. We analyze the forward pion-nucleon charge exchange reaction data in a Regge model and compare the resulting amplitu...
A new beam asymmetry measurement from pion photoproduction on the neutron using CLAS
beam asymmetry photonuclear photoproduction neutron pion
2009/11/24
We present a preliminary analysis of the photon beam asymmetry observable
(Σ) from the photoproduction reaction channel γn→pπ－ in the invariant mass range 1.6—2.3 GeV. The measurement was obtained us...
We develop a new framework for the study of the nuclear matter based on the linear sigma model. We introduce a completelynew viewpoint on the treatment of the nuclear matter with the inclusion of the ...
Study of Charged Pion Photoproduction on Deuteron with Tagged Photons
deuteron double delta
2009/10/28
The reactions γd→π-pp and γd→npπ+π- have been studied in an energy range from 0.8 to 1.1 GeV at the tagged photon facility of Laboratory of Nuclear Science, Tohoku University. Charged pions and proton...