研究了共振区中微子诱导的介子前向产生。我们的计算是基于一个动态耦合通道（DCC）模型，合理地描述了π（γ）N -> π N，η N，K λ，K σ数据的共振区。我们将PCAC假设应用到DCC模型中，将π N反应振幅与前向中微子反应振幅联系起来。用这种方法，我们给出了nu N -> pi N，pi pi N，eta N，K λ，K σ反应截面的预测.预测的nu N -> pi pi N，eta N，K λ，K σ截面，第一次，根据广泛的数据测试模型。我们比较了我们的结果与那些从Rein-Sehgal模型，已非常经常地使用在现有的Monte Carlo模拟器的中微子实验。我们发现它们之间存在显著差异。
英文摘要：
We study forward neutrino-induced meson production off the nucleon in the resonance region. Our calculation is based on a dynamical coupled-channels (DCC) model that reasonably describes pi (gamma) N -> pi N, eta N, K Lambda, K Sigma data in the resonance region. We apply the PCAC hypothesis to the DCC model to relate the pi N reaction amplitude to the forward neutrino reaction amplitude. In this way, we give a prediction for nu N -> pi N, pi pi N, eta N, K Lambda, K Sigma reaction cross sections. The predicted nu N -> pi pi N, eta N, K Lambda, K Sigma cross sections are, for the first time, based on a model extensively tested by data. We compare our results with those from the Rein-Sehgal model that has been very often used in the existing Monte Carlo simulators for neutrino experiments. We find a significant difference between them.
Using baryon chiral perturbation theory including vector mesons, we analyse various continuum contributions to the isoscalar electromagnetic spectral functions of the nucleon induced by the leading order couplings.
Recent analyses of backward meson electroproduction support the validity of a collinear QCD factorization framework for these hard exclusive reactions. This opens a way to the extraction of nucleon-to-meson transition distribution amplitudes (TDAs) from the experimental data. Similarly to the generalized parton distributions, TDAs - after the Fourier transform in the transverse plane - carry valuable information on the transverse location of hadron constituents. We address the properties of integrated nucleon-to-meson TDAs in the impact parameter representation. We argue that the emerging pict…
The interaction of Nucleon-Nucleon (NN) has certain physical characteristics, which indicated by nucleon, and meson degrees of freedom. The main purpose of this work is calculating the ground state energies of 21 Deutron and Alfa through the two-body system with the exchange of mesons (Pi, segma, omega) that mediated between two nucleons. This paper investigates NN interaction based on the quasi-relativistic decoupled Dirac equation and self-consistent Hartree-Fock formulation. We construct one-boson exchange potential (OBEP) model, where each nucleon is treated as a Dirac particle and acts as…
We investigate the reaction mechanism of the $ϕ$-meson photoproduction off the proton target, i.e., $γp\toϕp$, up to $\sqrt{s}=2.8$ GeV. For this purpose, we employ an effective Lagrangian approach in the tree-level Born approximation, and we employ various experimental and theoretical inputs. As a theoretical setup, the vectorlike Pomeron ($C=+1$) is taken into account as a parameterized two-gluon exchange contribution. We also consider $f_1(1285)$ axial-vector-meson, ($π,η$) pseudoscalar-meson, and ($a_0,f_0$) scalar-meson exchanges in the $t$ channel, in addition to the experimentally confi…
I overview our recent activity with the Argonne-Osaka dynamical coupled-channels (DCC) approach that provides a unified description of various electroweak meson productions on single nucleon and nucleus. First I discuss the DCC model of a single nucleon. The DCC model has been developed through a comprehensive analysis of $πN, γN\to πN, ηN, KΛ, KΣ$ reaction data. The model has been further extended to finite $Q^2$ region by analyzing pion electroproduction data, and to neutrino-induced reactions using the PCAC relation. Next I discuss applications of the DCC model to electroweak meson producti…
Vector meson production and nucleon resonance analysis in the Giessen coupled-channel model
我们提出了一个核子共振分析，同时考虑所有的π-和光子诱导的实验数据的最终状态$γN$，$πN$，$2πN$，$ηN$，$KΛ$，$KΣ$和$ωN$的能量从核子质量高达$\sqrt s = 2$ GeV。在这项分析中，我们发现了各种更高共振的有力证据，例如，$P_{13}(1900)$。$ωN$产生机制主要由大的$P_{11}(1710)$和$P_{13}(1900)$贡献决定。
It is shown that within a truncated partial wave analysis for photoproduction of two pseudoscalar mesons, it is possible to halve the number of independent partial amplitudes by taking into account parity conservation. In addition, within the framework of the proposed formalism, one can rather easily resolve the double discrete ambiguity arising from the symmetry under complex conjugation of the helicity amplitudes. This leads to essential simplifications of the complete experiment problem, at least as far as mathematical aspects are concerned.
Phenomenological implications of the nucleon's meson cloud
相互作用核子的长距离结构从其与轻强子自由度的耦合中得到重要贡献-轻介子云-而类似的非微扰机制预计将产生质子波函数的固有魅力（IC）分量。我们调查这两种可能性，保持为前者一个特殊的眼睛，以提高理论理解的π介子核子顶点的光建议的测量。关于IC的后一种可能性，我们强调了Hobbs等人（Phys Rev D 89：074008，2014）提出的光阵面模型的全球QCD分析所获得的最新结果。
