Zobrazeno 1 - 10
of 1 924
pro vyhledávání: '"FENG, Kun"'
We analyze, considering the contribution of $P$-wave charmonia, lattice data for the $D \overline{D}$-$D_s \overline{D}_s$ coupled-channel and $D \overline{D}{}^\ast$ systems and search for hidden-charm states with $J^{PC}=0^{++}$, $1^{++}$, and $2^{
Externí odkaz:
http://arxiv.org/abs/2410.19563
The low-energy $J/\psi N$ scattering is important for various reasons: it is related to the hidden-charm $P_c$ pentaquark states, provides insights into the role of gluons in nucleon structures, and is relevant to the $J/\psi$ properties in nuclear m
Externí odkaz:
http://arxiv.org/abs/2410.19526
The possible existence of nucleon-antinucleon bound states has been studied for decades. We investigate the $e^+e^-\to p\bar{p}$ and $e^+e^-\to n\bar{n}$ cross sections in the nonrelativistic effective field theory framework. The proton-antiproton an
Externí odkaz:
http://arxiv.org/abs/2410.16873
Autor:
Dias, Jorgivan Morais, Ji, Teng, Dong, Xiang-Kun, Guo, Feng-Kun, Hanhart, Christoph, Meißner, Ulf-G., Zhang, Yu, Zhang, Zhen-Hua
We analyze the latest LHCb data on the $\pi^+\pi^-$ spectrum in the isospin-violating $X(3872)~\to~J/\psi \pi^+\pi^-$ decay, employing a model-independent approach based on dispersion theory to deal with the $\pi\pi$ final state interactions. Additio
Externí odkaz:
http://arxiv.org/abs/2409.13245
The validity range of the time-honored effective range expansion can be very limited due to the presence of a left-hand cut close to the two-particle threshold. Such a left-hand cut arises in the two-particle interaction involving a light particle ex
Externí odkaz:
http://arxiv.org/abs/2408.09375
We investigate the feasibility of measuring the proton charge radius through dimuon photoproduction off a proton target. Our findings indicate that the Bethe-Heitler mechanism, which dominates at small momentum transfers, allows for an extraction of
Externí odkaz:
http://arxiv.org/abs/2407.20375
We propose a novel method to identify the two-pole structure of the $\Lambda(1405)$. The two poles owe their origin to different quark flavor irreducible representations in the meson-baryon coupled-channel interactions, thus they should be individual
Externí odkaz:
http://arxiv.org/abs/2407.13486
Autor:
Zhang, Zhen-Hua, Guo, Feng-Kun
Since 2003, plenty of resonant structures have been observed in the heavy quarkonium regime. Many of them are close to the thresholds of a few pairs of heavy hadrons. They are candidates of exotic hadrons and have attracted immense attentions. Based
Externí odkaz:
http://arxiv.org/abs/2407.10620
Publikováno v:
Phys. Rev. D 109, L111501 (2024)
We demonstrate that the dip observed near the total energy of 3872 MeV in the recent cross section data from the BESIII Collaboration for $e^+e^-\to J/\psi\pi^+\pi^- $ admits a natural explanation as a coupled-channel effect: it is a consequence of u
Externí odkaz:
http://arxiv.org/abs/2404.12003
Autor:
Zhang, Zhen-Hua, Ji, Teng, Dong, Xiang-Kun, Guo, Feng-Kun, Hanhart, Christoph, Meißner, Ulf-G., Rusetsky, Akaki
Publikováno v:
JHEP 08 (2024) 130
Using chiral effective field theory, we predict that there must be isovector charmonium-like $D\bar D^*$ hadronic molecules with $J^{PC}=1^{++}$ denoted as $W_{c1}$. The inputs are the properties of the $X(3872)$, including its mass and the ratio of
Externí odkaz:
http://arxiv.org/abs/2404.11215