Zobrazeno 1 - 10
of 412
pro vyhledávání: '"CAO Xiong"'
We perform a rigorous analysis of the $\pi K$ scattering at an unphysical pion mass $391~$MeV using the Roy-Steiner equations, which satisfy unitarity, analyticity and crossing symmetry, for the first time. Stable solutions of the Roy-Steiner equatio
Externí odkaz:
http://arxiv.org/abs/2412.03374
Being closely connected to the origin of the nucleon mass, the gravitational form factors of the nucleon have attracted significant attention in recent years. We present the first model-independent precise determinations of the gravitational form fac
Externí odkaz:
http://arxiv.org/abs/2411.13398
Autor:
Cao, Xiong-Hui, Guo, Zhi-Hui
We calculate the amplitudes of the axion photoproduction off the nucleon, i.e., $\gamma N \to a N$, within the framework of chiral effective field theory. Several different types of contributions are simultaneously included in our calculation, namely
Externí odkaz:
http://arxiv.org/abs/2408.15825
Publikováno v:
Zeitschrift für Kristallographie - New Crystal Structures, Vol 236, Iss 3, Pp 523-525 (2021)
C16H11N5O10S, triclinic, P1‾$P‾{1}$ (no. 2), a = 4.6658(1) Å, b = 12.2129(4) Å, c = 17.0355(5) Å, α = 74.925(2)°, β = 86.398(2)°, γ$\gamma $ = 88.040(2)°, V = 935.31(5) Å3, Z = 2, Rgt(F) = 0.0642, wRref(F2) = 0.1744, T = 295 K.
Externí odkaz:
https://doaj.org/article/e9ae5c4b645e4834ab8597dc93d62d0f
The double pion photoproduction off nucleons near threshold is analyzed in a covariant baryon chiral perturbation theory up to next to leading order, where the $\Delta(1232)$, $N^*(1400)$ and $\rho(770)$ resonances are included as explicit degrees of
Externí odkaz:
http://arxiv.org/abs/2406.08165
Hidden-charm exotic hadrons will be searched for and investigated at future electron-ion colliders. For instance, the $X(3872)$ can be produced through the exclusive process $\gamma p\to X(3872)p$. The vector meson dominance model has been commonly e
Externí odkaz:
http://arxiv.org/abs/2401.16112
Publikováno v:
Phys.Rev.D 109 (2024) 3, 034026
Based on the one-boson-exchange framework that the $\sigma$ meson serves as an effective parameterization for the correlated scalar-isoscalar $\pi\pi$ interaction, we calculate the coupling constants of the $\sigma$ to the $\frac{1}{2}^+$ ground stat
Externí odkaz:
http://arxiv.org/abs/2312.01013
Autor:
Wang, Xuan-He, Zhang, Zhao-Long, Cao, Xiong-Hui, Fan, Cong-Ling, Feng, Xu, Gao, Yu-Sheng, Jin, Lu-Chang, Liu, Chuan
We present a lattice QCD calculation of the nucleon electric polarizabilities at the physical pion mass. Our findings reveal the substantial contributions of the $N\pi$ states to these polarizabilities. Without considering these contributions, the la
Externí odkaz:
http://arxiv.org/abs/2310.01168
Publikováno v:
Phys. Rev. D 108, 034009 (2023)
An extended Roy equation including a bound state pole is used to study $\pi\pi$ scatterings at unphysical large pion masses when $\sigma$ becomes a bound state in one situation and stays as a broad resonance in the other case. The coupled integral eq
Externí odkaz:
http://arxiv.org/abs/2303.02596
The hyperbolic version of Roy-Steiner equation describing low energy $\pi N$ scatterings, with larger analyticity domain in the complex $s$ plane is solved. The numerical results on phase shifts of low partial waves are in agreement with that of Hofe
Externí odkaz:
http://arxiv.org/abs/2207.09743