arXiv subjects

Ying-Bo He

Publications and source records attributed to Ying-Bo He.

5 recordsLinked to original sources

arXiv2026

Production of hidden-charm molecular candidates with hidden strangeness in $B_s^0$ decays

We study the production of spin-one $D_{s0}^*(2317)\bar D_s^*$, $D_{s1}(2460)\bar D_s^*$, and $D_{s1}(2536)\bar D_s^*$ molecular candidates in $B_s^0$ decays with an accompanying $η$, providing a complementary probe of their structure and production mechanisms. The meson-loop rescattering amplitudes are constructed from factorized weak sources and heavy-hadron chiral interactions. Constituent couplings are estimated using threshold-dependent compositeness relations, and the associated input uncertainties are propagated to the predicted rates. Opposite-$C$-parity partner hypotheses are included with inherited benchmark parameters. We calculate the branching fractions for two relative signs. Over the cutoff range $2\leqα\leq5$, the larger central branching fractions reach several $10^{-6}$ to several $10^{-5}$, suggesting potential accessibility in future experimental measurements.

hep-ph↗

arXiv2026

Probing the two-pole structure of the $D_0^*(2300)$ with an $SU(3)$ flavor filter

We propose an $SU(3)$ flavor-filtering strategy to resolve the two-pole structure associated with the $D_0^*(2300)$ and to probe its flavor-sextet component directly in invariant-mass distributions. In unitarized chiral dynamics, the two poles originate predominantly from different irreducible representations of the coupled $\mathcal{D}Φ$ system. We show that the strong decays $Υ\to\barΞ_{c}^{(\prime)}Λ(1520)\mathcal{D}Φ$ and the weak decays $Ξ_{b}^{(\prime)}\toπ^-Λ(1520)\mathcal{D}Φ$ provide approximately antitriplet- and sextet-selective production sources. The predicted $Dπ$, $Dη$, and $D_s\bar K$ spectra exhibit complementary signatures: the higher pole near $2.45~\mathrm{GeV}$ generates a characteristic enhancement between the $Dη$ and $D_s\bar K$ thresholds and a pronounced near-threshold structure in the sextet-favored channels, whereas the lower pole near $2.1~\mathrm{GeV}$ dominates the antitriplet-favored channels. The contrast between these line shapes directly reflects the flavor representation selected by the corresponding cascade-baryon tag. The $Υ$ modes therefore provide experimentally testable observables for establishing the two-pole nature of the $D_0^*(2300)$ and for identifying a charmed-meson resonance with a dominant flavor-sextet component, while the weak-decay analysis tests the robustness of the line-shape pattern against changes in the production mechanism.

hep-ph↗

arXiv2026

Probing the nature of $D_1 K$ and $D_2 K$ molecules through $D_s^{(*)}ππ$ and $D_{s0(s1)}π$ decays

We study the two- and three-body decays of the $I=0$ $D_1K$ and $D_2K$ molecular states $T_{c\bar{s}1}^*$ and $T_{c\bar{s}2}^*$ into $D_s^{(*)}$ mesons and pions. Triangle singularities produce narrow peaks in the $D_s^*π$ and $D_sπ$ invariant mass spectra near the $D^*K$ and $DK$ thresholds. The isospin-violating two-body decays $T_{c\bar{s}1}^*\to D_{s1}(2460)π^0$, $T_{c\bar{s}2}^*\to D_{s1}(2460)π^0$, and $T_{c\bar{s}2}^*\to D_{s0}^*(2317)π^0$ exhibit large partial widths, reflecting the strong couplings inherent to molecular states. These predictions, obtained within heavy hadron chiral perturbation theory and the chiral unitary approach, provide complementary signatures for identifying $D_1K$ and $D_2K$ molecules at experiments.

hep-ph↗

arXiv2024

Identifying the two-pole structure of the $Λ(1405)$ using an SU(3) flavor filter

We propose a novel method to identify the two-pole structure of the $Λ(1405)$. The two poles owe their origin to different quark flavor irreducible representations in the meson-baryon coupled-channel interactions, thus they should be individually manifested in reactions that provide good flavor eigenstate sources. Hadronic decays of charmonia into $\barΛΣπ$ and $\barΛ(1520)Σπ$ are such reactions, and the flavor octet and singlet poles can be approximately singled out in these two decay modes. This SU(3) flavor filter works even considering the flavor symmetry breaking. With the huge charmonium data sets collected, it is therefore promising to solve the long-standing $Λ(1405)$ puzzle employing the proposed flavor filter.

hep-ph↗

arXiv2023

Searching for doubly charmed tetraquark candidates $T_{cc}$ and $T_{cc\bar{s}}$ in $B_c$ decays

In this work, we propose to search for the exotic doubly charmed meson $T_{cc}^+$ and its analog $T_{cc\bar{s}}^+$ in $B_c^+$ decays, which provide a good environment for the formation of the exotic state containing double charm quarks. Within the molecular scheme, the production of $T_{cc}^+$ and $T_{cc\bar{s}}^+$ through various rescattering processes with different intermediate states are investigated. For the moderate values of model parameters, the branching ratios of $B_c^+$ decaying into $T_{cc}^+ \bar{D}^{0}$, $T_{cc}^+ \bar{D}^{*0}$, $T_{cc\bar{s}}^+ \bar{D}^{0}$ and $T_{cc\bar{s}}^+ \bar{D}^{*0}$ are estimated to be of the order of $10^{-7}$, $10^{-5}$, $10^{-6}$ and $10^{-4}$, respectively, which may be tested by future experiments.

hep-ph↗