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Meng-Ting Yu

Publications and source records attributed to Meng-Ting Yu.

3 recordsLinked to original sources
arXiv2020

Decays of $X(3872)$ to $χ_{cJ}π^0$ and $J/ψπ^+π^-$

By describing the $X(3872)$ using the extended Friedrichs scheme, in which $D\bar D^*$ is the dominant component, we calculate the decay rates of the $X(3872)$ to $π^0$ and a $P$-wave charmonium $χ_{cJ}$ state with $J=0,1$, or $2$, and its decays to $J/ψπ^+π^-$ where $π^+π^-$ are assumed to be produced via an intermediate $ρ$ state. The decay widths of $X(3872)\toχ_{cJ}π^0$ for $J=0,1,2$ are of the same order. However, this model calculation exhibits that the decay rate of $X(3872)$ to $χ_{c1}π^0$ is one order of magnitude smaller than its decay rate to $J/ψπ^+π^-$.

hep-ph↗
arXiv2019

Possible molecular states in $B^{(*)}B^{(*)}$ scatterings

We present that, if unitarizing the $B^{(*)}B^{(*)}$ scattering amplitudes in the constituent interchange model, one can find two bound state poles for $(I_{tot},S_{tot})=(0,1)$ $BB^*$ and $B^*B^*$ system, which corresponds to two $I(J^P)=0(1^+)$ doubly bottomed molecular states. Furthermore, it is noticed that the virtual states in $(1,0)$ $BB$, $(1,1)$ $BB^*$, $(1,0)$ $B^*B^*$, and $(1,2)$ $B^*B^*$ systems could produce enhancements of the module squares of the scattering $T$-matrix just above the related thresholds, which might correspond to $I(J^P)=1(0^+)$, $1(1^+)$, and $1(2^+)$ doubly bottomed molecular states, respectively. The calculation may be helpful for searching for the doubly bottomed molecular state in future experiments.

hep-ph↗
arXiv2019

Understanding $X(3872)$ and its decays in the extended Friedrichs scheme

We present that the $X(3872)$ could be represented as a dynamically generated state in the extended Friedrichs scheme, in which the ratio of "elementariness" and "compositeness" of the different components in the $X(3872)$ is about $Z_{c\bar c}:X_{\bar D^0 D^{0*}}: X_{ D^+ D^{-*}}: X_{\bar D^* D^*}$ $= 1:(2.67\sim 8.85):(0.45\sim 0.46):0.04$. Furthermore, its decays to $π^0$ and a $P$-wave charmonium $χ_{cJ}$ state with $J=0,1$, or $2$, $J/ψπ^+π^-$, and $J/ψπ^+π^-π^0$ could be calculated out with the help of Barnes-Swanson model. The isospin breaking effects is easily understood in this scheme. This calculation also shows that the decay rate of $X(3872)$ to $χ_{c1}π^0$ is much smaller than its decay rate to $J/ψπ^+π^-$.

hep-ph↗