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Using the one-boson-exchange model, we studied the possible existence of very loosely bound hidden-charm molecular baryons composed of an anti-charmed meson and a charmed baryon. Our numerical results indicate that the ΣcD* and ΣcD states exist, but that the ΛcD and ΛcD* molecular states do not. 相似文献
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We present an SU(3)F meson mass formula from random phase approximation. Both the mesons of ground-state pseudoscalar octet and ground-state vector octet are described quite well by this mass formula. We also estimate the current and constituent quark masses from the naive quark model and the PCAC relation. 相似文献
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Compared with the charmed baryons, the bottom baryons are not very well known, either experimentally or theoretically. In this paper, we investigate the dipion strong decays of the P-wave and D-wave excited bottom baryons in the framework of the QPC model. We also extend the same analysis to the charmed baryons. 相似文献
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We study whether the broad enhancement X(1576) arises from the final state interaction (FSI) of p(1450, 1700)→p^+ p^- →K^+ K^-decay,Both the absorptive and dispersive contributions of the above amplitudes are considered since the intermediate states are very close to p(1450, 1700). AThe same mechanism leads to a similar enhancement around 1580 MeV in the π^+ π^- specturm in the J/ψ →π^0 π^+ π^- channel, which can be used to test whether X(1576) can be ascribed to the FSI effect ofp(1450, 1700) → p^+ p^-. 相似文献
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Using an extended chromomagnetic model,we perform a systematic study of the masses of doubly heavy tetraquarks.We find that the ground states of the doubly heavy tetraquarks are dominated by the color-triplet ■configuration,which is opposite to that of fully heavy tetraquarks.The combined results suggest that the color-triplet configuration becomes more important when the mass difference between the quarks and antiquarks increases.We find three stable states that lie below the thresholds of two pseudoscalar mesons.They are the IP=01+nnbb tetraquark,IP=1+nncb tetraquark,and JP=1+nsbb tetraquark. 相似文献
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We study possible exotic JPC=0+- states using tetraquark interpolating currents with the QCD sum rule approach. The extracted masses are around 4.85GeV for the charmonium-like states and 11.25 GeV for the bottomonium-like states. There is no working region for the light tetraquark currents, which implies that the light 0+- state may not exist below 2GeV. 相似文献
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In the framework of the one-boson-exchange model, we have performed an extensive study of the possible B*B, B*B*, D*D, D*D* molecular states with various quantum numbers after considering the S-wave and D-wave mixing. We also discuss the possible experimental research of these interesting states. 相似文献
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