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| 1 | The radiative decay D^(0)→ K^(*0)γ with vector meson dominance显示文摘Motivated by the experimental measurements of D^0 radiative decay modes, we have proposed a model to study the D^0→K^(*0)γ decay, by establishing a link with D^0→K^(*0) V(V = ρ~0, ω) decays through the vector meson dominance hypothesis. In order to do this properly, we have used the Lagrangians from the local hidden gauge symmetry approach to account for V γ conversion. As a result, we have found the branching ratio B[D^0→K^(*0)γ]=(1.55-3.44)×10^(-4), which is in fair agreement with the experimental values reported by the Belle and Ba Bar collaborations. | J.M.Dias V.R.Debastiani 谢聚军 E.Oset | 2018 | Chinese Physics C2018，42，4： | 0 |
| 2 | Triangle singularity enhancing isospin violation in B^0_s→ J/ψπ~0f_0(980)显示文摘We perform calculations for theB^0_s→J/ψπ~0f_0(980) andB^0_s→J/ψπ~0a_0(980) reactions, showing that the first is isospin-suppressed while the second is isospin-allowed. The reaction proceeds via a triangle mechanism, with B^0_s→J/ψK* Kˉ+c.c., followed by the decay K*→Kπ and a further fusion of K Kˉ into the f0(980) or a0(980). We show that the mechanism develops a singularity around the π~0f_0(980) or πa_0(980) invariant mass of 1420 Me V, where the π~0f_0 and π~0a_0 decay modes are magnified and also the ratio of π~0f_0 to π~0a_0 production. Using experimental information for theB^0_s→J/ψK* Kˉ+c.c. decay, we are able to obtain absolute values for the reactions studied which fall into the experimentally accessible range. The reactions proposed and the observables evaluated, when contrasted with actual experiments, should be very valuable to obtain information on the nature of the low lying scalar mesons. | 梁伟红 S.Sakai 谢聚军 E.Oset | 2018 | Chinese Physics C2018，42，4： | 0 |
| 3 | Ξbb and Ωbbb molecular states显示文摘Using the vector exchange interaction in the local hidden gauge approach,which in the light quark sector generates the chiral Lagrangians and has produced realistic results for Ωc,Ξc,Ξb and the hidden charm pentaquark states,we study the meson-baryon interactions in the coupled channels that lead to the Ξbb and Ωbbb excited states of the molecular type.We obtain seven states of the Ξbb type with energies between 10408 and 10869 MeV,and one Ωbbb state at 15212 MeV. | J.M.Dias 余圻昕 梁伟红 孙志峰 谢聚军 E.Oset | 2020 | Chinese Physics C2020，44，6： | 0 |
| 4 | μ^-在原子核上的俘获显示文摘利用多体场论方法,本文对μ^-在原子核上的俘获作了系统研究.在没有任何可调参数的情况下,对于从轻核到重核各种原子核上的μ^-俘获率作了计算.发现,自旋-同位旋相关的强作用的重整化效应及μ^-在原子核上的束缚能效应是透彻理解运种弱作用过程的关键. | 姜焕清 E.Oset | 1990 | 高能物理与核物理1990，14，6： | 0 |
| 5 | The ■_(s)^(0)→J/ψπ^(0)η decay and the a_(0)(980)-f_(0)(980) mixing显示文摘We study the ■_(s)^(0)→J/ψf_(0)(980) and ■_(s)^(0)→J/ψa_(0)(980) reactions,and pay attention to the different sources of iso spin violation and mixing of f_(0)(980) and a_(0)(980) resonances where these resonances are dynamically generated from meson-meson interactions.We find that the main cause of isospin violation is isospin breaking in the meson-meson transition T matrices,and the other source is that the loops involving kaons in the production mechanism do not cancel due to the different masses of charged and neutral kaons.We obtain a branching ratio for a_(0)(980)production of the order of 5×10^(-6).Future experiments can address this problem,and the production rate and shape of the π^(0)η mass distribution will definitely help to better understand the nature of scalar resonances. | 李嘉婷 林佳欣 张功杰 梁伟红 E.Oset | 2022 | Chinese Physics C2022，46，8： | 0 |
| 6 | 一些XYZ共振态的辐射衰变显示文摘类粲偶素态Y(3940),Z(3930)和X(4160)可由带粲数的矢量介子相互作用动力学地产生出来,它们的开粲辐射衰变对于理解其内部结构有重要意义。本文研究了这些共振态衰变到D*Dγ或Ds*Dsγ的开粲辐射衰变,结果表明,对分别具有D*D*(或Ds*D s*)分子态和非分子态结构的XYZ共振态,其辐射衰变宽度(或辐射衰变宽度比)相对于Dγ(或Dsγ)体系不变质量Minv的分布图存在非常明显的区别,这为鉴别类粲偶素态XYZ是否具有分子态结构提供了很好的理论判据。 | 梁伟红 R.Molina E.Oset | 2011 | 广西物理2011，32，1： | 0 |
| 7 | Three-body hadronic molecules显示文摘In this talk,I discuss our recent studies of three-hadron systems and the resonances found therein.The studies consist of solving Faddeev equations with the input two body interactions obtained from the chiral Lagrangians.The systems which we study are either made of two mesons and a baryon or of three mesons.The motivation for these studies comes from the data on many baryon resonances,especially the ones with J π = 1/2 +,which show a large branching ratio to the two meson-one baryon decay channels.In addition to this,several new studies at BES,BELLE,BABAR etc.,claim the existence of new meson resonances which seem to couple strongly to three-meson systems,where mostly two out of the three mesons appear as a known resonance.Hitherto,we have studied two meson-one baryon systems with strangeness =-1,0 and 1 and three-meson systems made of two-pseudoscalars and a vector meson.As we will show in this manuscript,we find many resonances which couple to three-hadrons. | K.P.Khemchandani A.Martínez Torres E.Oset | 2010 | Chinese Physics C2010，34，9： | 0 |
| 8 | Charmed hadrons in nuclear medium显示文摘We study the properties of charmed hadrons in dense matter within a coupled-channel approach which accounts for Pauli blocking effects and meson self-energies in a self-consistent manner.We analyze the behaviour in this dense environment of dynamically-generated baryonic resonances as well as the open-charm meson spectral functions.We discuss the implications of the in-medium properties of open-charm mesons on the D s0 (2317) and the predicted X(3700) scalar resonances. | L.Tolos D.Gamermann C.Garcia-Recio R.Molina J.Nieves E.Oset A.Ramos | 2010 | Chinese Physics C2010，34，9： | 0 |
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