"Xi(1620) and Xi(1690) have recently been actively studied both experimentally and theoretically.
We have constructed the models which are based on the Belle and ALICE experimental results, with the chiral unitary method previously.(できれば自分の論文を)
In this study we discuss the physical origin of poles in the scattering amplitude by extrapolating different models.
We also study the near...
"Near-threshold exotic hadrons are studied actively. In order to understand the nature of them, it is necessary to determine the scattering length from experimental data, because the scattering length governs the near-threshold scatterings. The cusp structure of cross sections reflects the value of the scattering length. In this work, we study the behavior of threshold cusp in multi-channel...
ハドロンの束縛状態や散乱を調べるためにハドロン間の相互作用をポテンシャルとして扱う。強度が実数のポテンシャルを用いると束縛状態を扱うことができ、その固有運動量は複素運動量平面に解析接続された散乱振幅の極として表される。しかし殆どのハドロンは不安定であるため、ポテンシャルに虚部を入れると束縛状態に幅が生じることを利用し複素ポテンシャルを用いて解析を行う。
本研究ではポテンシャルの実部を変化させた時の散乱振幅の極の軌跡について、ポテンシャルに虚部を入れた時の影響を調べる。また、数値計算から厳密に得られた極の値と有効レンジ展開で見積もられた値を比較し、有効レンジ展開の妥当性とその性質について議論する。
I will discuss the self-consistent studies of M1 radiative decays of quarkonia in the light-front quark model. The operators with different polarizations are derived, and the model predictions for the transition form factor and decay widths are computed. A comparison with experimental and lattice QCD data will also be discussed.
強い磁場の下ではチャーモニウムのJ/Ψとηcが混合し、質量スペクトルに特徴的な分裂が生じることがクォークモデルを用いて予言されている。この発表では強磁場下でボトムバリオンΛb、Σb、がどのような質量スペクトルを示しているのかをクォークモデルを用いて計算した結果について報告する。計算する際にはアップクォークとダウンクォークがダイクォークを構成しているとして、ダイクォークとボトムクォークの二体問題として解く。
We study the interaction between D and D* bar mesons using the effective model in which the properties of X(3872) have been reproduced well.
"We study the properties of the hadron-hadron potentials and quark-antiquark potentials from the viewpoint of the channel coupling[1]. We introduce the effective hadron-hadron potential with coupled to the quark channel.
As an application, we construct a coupled-channel model of $c\bar{c}$ and $D\bar{D}$ to describe exotic hadron $X(3872)$[2].
For the obtained nonlocal potentials, we apply...
"Some hadrons are difficult to explain as normal hadrons made of quark-antiquark pairs or three quarks. These are called exotic hadrons. Since the Belle experiment discovered $X(3872)$ in 2003, more exotic hadrons containing charm quarks have been reported. Exotic hadrons likely have more complex structures than normal hadrons, but this is still uncertain.
The $X(3872)$ is one of the most...
In 2022, the LHCb Collaboration announced the discovery of the doubly charmed tetraquark T^+{cc} in the 𝐷^0𝐷^0\pi^+ line shape. Using a model that simultaneously handles both the 𝐷𝐷^∗ molecular state and the cc\bar{u}\bar{d} compact state, we analyzed the 𝐷^0𝐷^0\pi^+ line shape, and obtained the mass and decay width of T^+{cc} as the S-matrix pole. Furthermore, to examine the internal...
Recent accelerator experiments have reported unexpected states known as exotic hadrons, whose properties cannot be explained by the conventional picture. In the heavy quark sector, XYZ, Tcc and Pc have been reported since the discovery of X(3872). In this talk, we study $\bar{D}\Xi_{cc}$ pentaquark as a partner of $T_{cc}$ recently observed by the LHCb experiment. $T_{cc}$ tetraquark is a...
