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Non-extensive statistical distributions of charmed meson production in Pb-Pb and pp(p)collisions 被引量:1
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作者 Yuan Su Yong-Jie Sun +1 位作者 Yi-Fei Zhang Xiao-Long Chen 《Nuclear Science and Techniques》 SCIE EI CAS CSCD 2021年第10期79-87,共9页
The mid-rapidity transverse momentum spectra of charmed mesons in Pb–Pb and pp(p)collisions are analyzed using the Tsallis–Pareto distribution derived from non-extensive statistics.We provide uniform descriptions of... The mid-rapidity transverse momentum spectra of charmed mesons in Pb–Pb and pp(p)collisions are analyzed using the Tsallis–Pareto distribution derived from non-extensive statistics.We provide uniform descriptions of both small and large systems over a wide range of collision energies and hadron transverse momenta.By establishing the relationship between the event multiplicity and Tsallis parameters,we observe that there is a signifi-cant linear relationship between the thermal temperature and Tsallis q parameter in Pb–Pb collisions at √sNN=2.76 TeV and 5.02 TeV.Further,the slope of the T–(q-1)parameter plot is positively correlated with the hadron mass.In addition,charmed mesons have a higher thermal temperature than light hadrons at the same q-1,indicat-ing that the charm flavor requires a higher temperature to reach the same degree of non-extensivity as light flavors in heavy-ion collisions.The same fit is applied to the trans-verse momentum spectra of charmed mesons in pp(p)collisions over a large energy range using the Tsallis–Pareto distribution.It is found that the thermal temperature increases with system energy,whereas the q parameter becomes saturated at the pp(p)limit,q-1=0.142±0.010.In addition,the results of most peripheral Pb–Pb collisions are found to approach the pp(p)limit,which suggests that more peripheral heavy-ion collisions are less affected by the medium and more similar to pp(p)collisions. 展开更多
关键词 charmed meson Non-extensive statistics Tsallis-Pareto distribution QGP Heavy-ion collision
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RATIO OF CHARMED BARYON TO MESON IN e^(+)e^(-) ANNIHILATION
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作者 CHEN E-sheng WU Qian 《Chinese Physics Letters》 SCIE CAS CSCD 1990年第3期109-112,共4页
A method to determine the value of the ratio of charmed baryon to meson in e^(+)e^(-) annihilation is investigated.Using the data of CLEO,HRS and MARK Ⅱ groups,we obtain f≡B_(c)/M_(c)=0.21±0.05,0.24±0.08 a... A method to determine the value of the ratio of charmed baryon to meson in e^(+)e^(-) annihilation is investigated.Using the data of CLEO,HRS and MARK Ⅱ groups,we obtain f≡B_(c)/M_(c)=0.21±0.05,0.24±0.08 and 0.33±0.05,for √s=5.2,10.55 and 29GeV,respectively. 展开更多
关键词 ANNIHILATION meson charm
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Charmed Meson Production in Deep Inelastic e+A Scattering at Small_(-x)
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作者 王宏民 侯召宇 +1 位作者 刘家福 孙献静 《Communications in Theoretical Physics》 SCIE CAS CSCD 2011年第8期307-311,共5页
Based on the nuclear effects considered in the Glauber-Gribov approach,charmed meson production inhigh energy deep inelastic e+A scattering is investigated in the color dipole formalism.Using the Peterson fragmentatio... Based on the nuclear effects considered in the Glauber-Gribov approach,charmed meson production inhigh energy deep inelastic e+A scattering is investigated in the color dipole formalism.Using the Peterson fragmentationfunction and the KLR-AdS/CFT color dipole model,which reasonably well describes the HERA data for the inclusivestructure functions at small Bjorken-x,we present the predictive results for the D-meson transverse spectra at EIC andLHeC energies.The theoretical results indicate that the x-independence phenomena at very small-x predicted by theKLR-AdS/CFT model are not seen in our calculation. 展开更多
关键词 charmed meson production Glauber-Gribov approach saturation physics
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BOTTOM,CHARMED MESONS(B=C=±1)B_c^+=c,B_c^-=cb,similarly for B_c~*'s 被引量:5
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作者 K.A.Olive K.Agashe +208 位作者 C.Amsler M.Antonelli J.-F.Arguin D.M.Asner H.Baer H.R.Band R.M.Barnett T.Basaglia C.W.Bauer J.J.Beatty V.I.Belousov J.Beringer G.Bernardi S.Bethke H.Bichsel O.Biebe E.Blucher S.Blusk G.Brooijmans O.Buchmueller V.Burkert M.A.Bychkov R.N.Cahn M.Carena A.Ceccucci A.Cerr D.Chakraborty M.-C.Chen R.S.Chivukula K.Copic G.Cowan O.Dahl G.D'Ambrosio T.Damour D.de Florian A.de Gouvea T.DeGrand P.de Jong G.Dissertor B.A.Dobrescu M.Doser M.Drees H.K.Dreiner D.A.Edwards S.Eidelman J.Erler V.V.Ezhela W.Fetscher B.D.Fields B.Foster A.Freitas T.K.Gaisser H.Gallagher L.Garren H.-J.Gerber G.Gerbier T.Gershon T.Gherghetta S.Golwala M.Goodman C.Grab A.V.Gritsan C.Grojean D.E.Groom M.Grnewald A.Gurtu T.Gutsche H.E.Haber K.Hagiwara C.Hanhart S.Hashimoto Y.Hayato K.G.Hayes M.Heffner B.Heltsley J.J.Hernandez-Rey K.Hikasa A.Hocker J.Holder A.Holtkamp J.Huston J.D.Jackson K.F.Johnson T.Junk M.Kado D.Karlen U.F.Katz S.R.Klein E.Klempt R.V.Kowalewski F.Krauss M.Kreps B.Krusche Yu.V.Kuyanov Y.Kwon O.Lahav J.Laiho P.Langacker A.Liddle Z.Ligeti C.-J.Lin T.M.Liss L.Littenberg K.S.Lugovsky S.B.Lugovsky F.Maltoni T.Mannel A.V.Manohar W.J.Marciano A.D.Martin A.Masoni J.Matthews D.Milstead P.Molaro K.Monig F.Moortgat M.J.Mortonson H.Murayama K.Nakamura M.Narain P.Nason S.Navas M.Neubert P.Nevski Y.Nir L.Pape J.Parsons C.Patrignani J.A.Peacock M.Pennington S.T.Petcov Kavli IPMU A.Piepke A.Pomarol A.Quadt S.Raby J.Rademacker G.Raffel B.N.Ratcliff P.Richardson A.Ringwald S.Roesler S.Rolli A.Romaniouk L.J.Rosenberg J L.Rosner G.Rybka C.T.Sachrajda Y.Sakai G.P.Salam S.Sarkar F.Sauli O.Schneider K.Scholberg D.Scott V.Sharma S.R.Sharpe M.Silari T.Sjostrand P.Skands J.G.Smith G.F.Smoot S.Spanier H.Spieler C.Spiering A.Stahl T.Stanev S.L.Stone T.Sumiyoshi M.J.Syphers F.Takahashi M.Tanabashi J.Terning L.Tiator M.Titov N.P.Tkachenko N.A.Tornqvist D.Tovey G.Valencia G.Venanzoni M.G.Vincter P.Vogel A.Vogt S.P.Wakely W.Walkowiak C.W.Walter D.R.Ward G.Weiglein D.H.Weinberg E.J.Weinberg M.White L.R.Wiencke C.G.Wohl L.Wolfenstein J.Womersley C.L.Woody R.L.Workman A.Yamamoto W.-M.Yao G.P.Zeller O.V.Zenin J.Zhang R.-Y.Zhu F.Zimmermann P.A.Zyla G.Harper V.S.Lugovsky P.Schaffner 《Chinese Physics C》 SCIE CAS CSCD 2014年第9期1239-1247,共9页
I(JP) = 0(0-)I, J, P need confirmation.Quantum numbers shown are quark-model predictions.
关键词 B=C HBC B BOTTOM charmED mesons B_c cb similarly for B_c
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Lepton mass correction in partial wave analyses of charmed meson semi-leptonic decays
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作者 张晗 柯百谦 +1 位作者 余耀 王恩 《Chinese Physics C》 SCIE CAS CSCD 2023年第6期1-4,共4页
We derive a parameterization formula for the partial wave analyses of charmed meson semi-leptonic decays while considering the effects of lepton mass.Because the proposed super-tau-charm factory will reach a significa... We derive a parameterization formula for the partial wave analyses of charmed meson semi-leptonic decays while considering the effects of lepton mass.Because the proposed super-tau-charm factory will reach a significantly enhanced luminosity and BESIII is collecting newψ(3770)→DD data,our results will help improve the measurement precision of future partial wave analyses of charmed meson semi-muonic decays. 展开更多
关键词 partial wave analysis charmed meson semi-leptonic decay
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ρ-meson longitudinal leading-twist distribution amplitude revisited and the D→ρsemileptonic decay
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作者 钟涛 代亚红 付海冰 《Chinese Physics C》 SCIE CAS CSCD 2024年第6期82-91,共10页
Motivated by our previous study[Phys.Rev.D 104(1),016021(2021)]on the pionic leading-twist distribution amplitude(DA),we revisit theρ-me son leading-twist longitudinal DAφ_(2;ρ)^(‖)(x,μ)in this study.A model prop... Motivated by our previous study[Phys.Rev.D 104(1),016021(2021)]on the pionic leading-twist distribution amplitude(DA),we revisit theρ-me son leading-twist longitudinal DAφ_(2;ρ)^(‖)(x,μ)in this study.A model proposed by Chang based on the DYyson-Schwinger equations is adopted to describe the behavior ofφ_(2;ρ)^(‖)(x,μ).However,theξ-moments ofφ_(2;ρ)^(‖)(x,μ)are calculated with the QCD sum rules in the framework of the background field theory.The sum rule formulas for these moments are improved.More accurate values for the first five nonzeroξ-moments at the typical scaleμ=(1.0,1.4,2.0,3.0)GeV are given,e.g.,atμ=1 GeV,(ξ^(2))>_(2;ρ)^(‖)=0.220(6),(ξ^(4))>_(2;ρ)^(‖)=0.103(4),(ξ^(6))>_(2;ρ)^(‖)=0.066(5),(ξ^(8))>_(2;ρ)^(‖)=0.046(4),and(ξ^(10))>_(2;ρ)^(‖)=0.035(3).By fitting these values with the least squares method,the DSE model forφ_(2;ρ)(x,μ)is determined.By taking the left-handed current light-cone sum rule approach,we obtain the transition form factor in the large recoil region,i.e.,A_(1)(0)=0.498_(-0.012)^(+0.014),A_(2)(0)=0.460_(-0.047)^(+0.055),and V(0)=0.800_(-0.014)^(+0.015),and the ratio r_(2)=0.923_(-0.119)^(+0.133),rV=1.607_(-0.071)^(+0.071).After extrapolating with a rapidly converging series based on z(t)-expansion,we present the|V_(cd)|-independent decay width for the semileptonic decays D→ρ^(l+)v_(l).Finally,the branching fractions are B(D^(0)→ρ^(-)e+v_(e))=1.825_(-0.162)^(+0.170)±0.004,B(D^(+)→ρ^(0)e+v_(e))=2.299_(-0.204)^(+0.214)±0.011,B(D^(0)→ρ^(-)μ^(+)v_(μ))=1.816_(-0.160)^(+0.168)±0.004,and B(D^(+)→ρ^(0)μ+v_(μ))=2.288_(-0.201)^(+0.212)±0.011. 展开更多
关键词 QCD sum rule charmed meson semileptonic decay Rho meson light-cone distribution amplitude
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Estimating the production rates of D-wave charmed mesons via the semileptonic decays of bottom mesons
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作者 Kan Chen Hong-Wei Ke +1 位作者 Xiang Liu Takayuki Matsuki 《Chinese Physics C》 SCIE CAS CSCD 2019年第2期53-76,共24页
Using the covariant light-front approach with conventional vertex functions, we estimate the production rates of D-wave charmed/charmed-strange mesons via the B_((s)) semileptonic decays. As the calculated production ... Using the covariant light-front approach with conventional vertex functions, we estimate the production rates of D-wave charmed/charmed-strange mesons via the B_((s)) semileptonic decays. As the calculated production rates are significant, it seems possible to experimentally search for D-wave charmed/charmed-strange mesons via semileptonic decays, which may provide an additional approach for exploring D-wave charmed/charmed-strange mesons. 展开更多
关键词 LIGHT-FRONT quark model SEMILEPTONIC decay charmed/charmed-strange meson
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CALCULATION OF THE YIELDS OF VARIOUS CHARMED MESONS IN e^+e^- ANNIHILATIONS
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作者 陈鄂生 谢去病 《Science China Mathematics》 SCIE 1990年第8期955-965,共11页
The yields of the charmed mesons in e^+e^- annihilations have been calculated in virtue of the quark production rule and quark combination rule proposed in Ref. [1]. The results are in agreement with the experimental ... The yields of the charmed mesons in e^+e^- annihilations have been calculated in virtue of the quark production rule and quark combination rule proposed in Ref. [1]. The results are in agreement with the experimental data, which shows that the mechanism for e^+e^- annihilation into hardons is successful. 展开更多
关键词 e^+e^- ANNIHILATION QUARK charmed meson.
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π-J/ψ correlation and elliptic flow parameter v_2 of charmed mesons at RHIC energy
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作者 彭茹 杨纯斌 《Chinese Physics C》 SCIE CAS CSCD 2011年第5期453-458,共6页
We study the correlation between the trigger π and the associated J/ψ on near and away sides in Au+Au collisions at sNN^(1/2) = 200 GeV. In the region of trigger momentum pt 〉 4 GeV/c, the π spectrum is compose... We study the correlation between the trigger π and the associated J/ψ on near and away sides in Au+Au collisions at sNN^(1/2) = 200 GeV. In the region of trigger momentum pt 〉 4 GeV/c, the π spectrum is composed of thermal-shower and shower-shower recombinations in the frame work of the recombination model. We consider the azimuthal anisotropy in the quenched hard parton distribution and then calculate the elliptic flow parameter v2 of charmed mesons (J/ψ, D0 and Ds) for different centralities. 展开更多
关键词 recombination model di-hadron correlation elliptic flow parameter charmed meson
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Radiative decays of charmed mesons in a modified relativistic quark model
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作者 Jie-Lin Li Dian-Yong Chen 《Chinese Physics C》 SCIE CAS CSCD 2022年第7期56-67,共12页
In this study, we perform systematic estimations of the radiative decays of the charmed mesons in a modified relativistic quark model. Our estimations indicate that the branching ratios of the processes of D^(0)_(2)(1... In this study, we perform systematic estimations of the radiative decays of the charmed mesons in a modified relativistic quark model. Our estimations indicate that the branching ratios of the processes of D^(0)_(2)(1^(3)P_(2)) →D^(0)(1^(3)S_(1)) γ , D_3^0(1D_3) o D^(0)_(2)(1^(3)P_(2)) γ , D^(0)_(2)(2D_2^) o D_1^(0)(2P_1) γ , D_3^0(2^3D_3) o D^(0)_(2)(2^3P_(2)) γ , and D^(\ast 0)(1^(3)S_(1)) o D^0(1^1S_0) γ are of the order of 10^(-2) , which are sizable to be detected experimentally. Moreover, the branching ratios of some channels, for example, D_1^0(1P_1) o D(1^1S_0)^0 γ , D^0(3^1S_0) o D_1^( 0)(2P^_(1)) γ , and D^0(3^3S_(1)) o D^(0)_(2)(2^3P_(2)) γ , are estimated to be of the order of 10^(-3) , which may be accessible with the accumulation of data in future experiments. 展开更多
关键词 charmed mesons radiative decays quark model
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Open charm mesons and charmonia in magnetized strange hadronic matter
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作者 Amal Jahan C.S. Amruta Mishra 《Chinese Physics C》 SCIE CAS CSCD 2022年第8期91-113,共23页
We investigate the in-medium masses of open charm mesons(D(D^(0),D^(+)),■(■^(0),D^(-)),D_(s)(D_(s)^(+),D_(s)^(-)))and charmonium states(J/ψ,ψ(3686),ψ(3770),χ_(c0),χ_(c2)) in strongly magnetized isospin asymmetr... We investigate the in-medium masses of open charm mesons(D(D^(0),D^(+)),■(■^(0),D^(-)),D_(s)(D_(s)^(+),D_(s)^(-)))and charmonium states(J/ψ,ψ(3686),ψ(3770),χ_(c0),χ_(c2)) in strongly magnetized isospin asymmetric strange hadronic matter using a chiral effective model.In the presence of a magnetic field,the number and scalar densities of charged baryons have contributions from Landau energy levels.The mass modifications of open charm mesons result from their interactions with nucleons,hyperons,and the scalar fields(the non-strange field σ,strange field C and isovector field δ) in the presence of a magnetic field.The mass modifications of the charmonium states result from the modification of gluon condensates in a medium simulated by the variation in the dilaton field(χ) in the chiral effective model.The effects of finite quark masses are also incorporated in the trace of the energy-momentum tensor in quantum chromodynamics to investigate the mass shifts of charmonium states.The in-medium masses of open charm mesons and charmonia are observed to decrease with an increase in baryon density.The charged D^(+),D^(-),Z_(s)^(+),and D_(s)^(-)mesons have additional positive mass shifts due to Landau quantization in the presence of a magnetic field.The effects of the strangeness fraction are observed to be more dominant for ■ mesons compared with D mesons.The mass shifts of charmonia are observed to be larger in hyperonic media compared with nuclear media when the effect of the finite quark mass term is neglected.These medium mass modifications can have observable consequences on the production of the open charm mesons and charmonia in high-energy asymmetric heavy-ion collision experiments. 展开更多
关键词 open charm mesons charmonium states strange hadronic matter magnetic field heavy-ion collision chiral effective model
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Excited state mass spectra, decay properties and Regge trajectories of charm and charm-strange mesons
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作者 Virendrasinh Kher Nayneshkumar Devlani Ajay Kumar Rai 《Chinese Physics C》 SCIE CAS CSCD 2017年第7期14-24,共11页
The framework of a phenomenological quark-antiquark potential(Coulomb plus linear confinement)model with a Gaussian wave function is used for detailed study of masses of the ground, orbitally and radially excited st... The framework of a phenomenological quark-antiquark potential(Coulomb plus linear confinement)model with a Gaussian wave function is used for detailed study of masses of the ground, orbitally and radially excited states of heavy-light Qq^-,(Q=c,q=u/d,s) mesons. We incorporate a O(1/m) correction to the potential energy term and relativistic corrections to the kinetic energy term of the Hamiltonian. The spin-hyperfine, spin-orbit and tensor interactions incorporating the effect of mixing are employed to obtain the pseudoscalar, vector, radially and orbitally excited state meson masses. The Regge trajectories in the(J,M^2) and(nr,M^2) planes for heavy-light mesons are investigated with their corresponding parameters. Leptonic and radiative leptonic decay widths and corresponding branching ratios are computed. The mixing parameters are also estimated. Our predictions are in good agreement with experimental results as well as lattice and other theoretical models. 展开更多
关键词 charm meson strange meson potential model
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Strong Decays of Charm Mesons D_1~*(2680), D_3~*(2760), D_2~*(3000)
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作者 Zhi-Gang Wang 《Communications in Theoretical Physics》 SCIE CAS CSCD 2016年第12期671-674,共4页
In this article, we assign the higher charm mesons D1^*(2680), D3^*(2760), D2^*(3000) to be the 2S 1^-, 1D3^- and 1F 2^+ states, respectively, and study the two-body strong decays to the ground state charm m... In this article, we assign the higher charm mesons D1^*(2680), D3^*(2760), D2^*(3000) to be the 2S 1^-, 1D3^- and 1F 2^+ states, respectively, and study the two-body strong decays to the ground state charm mesons and light pseudoscalar mesons with the heavy meson effective theory. We obtain the ratios among the strong decays, which can be confronted to the experimental data in the future and shed light on the nature of those higher charm mesons. 展开更多
关键词 charm mesons strong decays
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Possible heavy molecular states composed of a pair of excited charm-strange mesons
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作者 胡斌 陈晓林 +4 位作者 罗志刚 黄鹏志 朱世琳 于鹏飞 刘翔 《Chinese Physics C》 SCIE CAS CSCD 2011年第2期113-125,共13页
The P-wave charm-strange mesons Ds0(2317) and Ds1(2460) lie below the DK and D*K threshold respectively. They are extremely narrow because their strong decays violate the isospin symmetry. We study the possible h... The P-wave charm-strange mesons Ds0(2317) and Ds1(2460) lie below the DK and D*K threshold respectively. They are extremely narrow because their strong decays violate the isospin symmetry. We study the possible heavy molecular states composed of a pair of excited charm strange mesons. As a byproduct, we also present the numerical results for the bottonium-like analogue. 展开更多
关键词 molecular state P-wave charmed-strange mesons
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矢量粲-底介子质量谱在雷吉唯象学中的研究
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作者 于凤军 魏科伟 +2 位作者 祁敬娟 李宁 王振洋 《安阳师范学院学报》 2012年第5期1-5,共5页
在雷吉(Regge)唯象学中,本文利用雷吉轨迹结合Regge斜率和截距关系式,首先计算了基态矢量粲-底介子B*c的质量,然后计算了矢量底偶素和粲偶素的雷吉斜率比值,最后计算了激发态矢量粲-底介子cb珋(2S,3S,4S)的质量。本文的预言与其它方法... 在雷吉(Regge)唯象学中,本文利用雷吉轨迹结合Regge斜率和截距关系式,首先计算了基态矢量粲-底介子B*c的质量,然后计算了矢量底偶素和粲偶素的雷吉斜率比值,最后计算了激发态矢量粲-底介子cb珋(2S,3S,4S)的质量。本文的预言与其它方法得到的结果很好的符合,这些预言可以对我们探索未被发现的粲-底矢量cb珋介子态提供帮助。 展开更多
关键词 雷吉唯象学 粲-底介子 质量谱
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BESⅢ上粲介子半轻衰变D_s^+→K^(0)e^+ν_e和D_s^+→K^(*0)e^+ν_e的蒙特卡罗研究
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作者 李蕾 闵瀚云 《北京石油化工学院学报》 2018年第1期75-78,共4页
通过分析在质心系能量s^(1/2)=4.18GeV处产生的蒙特卡罗样本,模拟测量了奇异粲介子D_s^+半轻衰变过程D_s^+→K^(0)e^+ν_e和D_s^+→K^(*0)e^+ν_e的绝对分支比。通过蒙特卡罗模拟,预期了BESⅢ实验对这2个半轻衰变分支比的测量精度。研... 通过分析在质心系能量s^(1/2)=4.18GeV处产生的蒙特卡罗样本,模拟测量了奇异粲介子D_s^+半轻衰变过程D_s^+→K^(0)e^+ν_e和D_s^+→K^(*0)e^+ν_e的绝对分支比。通过蒙特卡罗模拟,预期了BESⅢ实验对这2个半轻衰变分支比的测量精度。研究表明,如果BESⅢ实验在质心系能量s^(1/2)=4.18GeV采集3.2fb^(-1)的实验数据,D_s^+→K^(0)e^+ν_e和D_s^+→K^(*0)e^+ν_e衰变分支比的测量精度能够达到11.2%与12.5%。 展开更多
关键词 奇异粲介子 卡比堡压制半轻衰变 衰变分支比 测量精度
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S波自旋单态底夸克偶素衰变到粲夸克对
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作者 孙佳佳 张玉洁 熊畅 《北京航空航天大学学报》 EI CAS CSCD 北大核心 2019年第1期212-217,共6页
对S波自旋单态底夸克偶素衰变到粲夸克对进行了研究,同时还研究了S波自旋单态和自旋三重态底夸克偶素衰变到D介子对。利用BaBar实验组测量得到的自旋三重态底夸克偶素衰变到D介子分支比的数据,发现自旋三重态底夸克偶素的色八重态矩阵... 对S波自旋单态底夸克偶素衰变到粲夸克对进行了研究,同时还研究了S波自旋单态和自旋三重态底夸克偶素衰变到D介子对。利用BaBar实验组测量得到的自旋三重态底夸克偶素衰变到D介子分支比的数据,发现自旋三重态底夸克偶素的色八重态矩阵元远小于理论预言,理论预言要比实验上限大20倍以上;得到S波自旋单态底夸克偶素衰变到粲夸克对的分支比的理论预言,可以进行实验测量从而研究色八重态矩阵元;得到S波自旋单态底夸克偶素衰变到D介子对的分支比的理论预言,与其他理论预言差异较大。这些预言可以通过BelleⅡ的实验进行验证,从而得到更多强子化的信息。 展开更多
关键词 底夸克偶素 粲夸克 D介子 色八重态机制 碎裂函数
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Possible hadronic molecular states composed of S-wave heavy-light mesons 被引量:2
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作者 刘明珠 贾多杰 陈殿勇 《Chinese Physics C》 SCIE CAS CSCD 2017年第5期54-65,共12页
We perform a systematical study of possible molecular states composed of the S wave heavy light mesons,where the S–D mixing and η-η' mixing are explicitly included.Our calculation indicates that the observed X(3... We perform a systematical study of possible molecular states composed of the S wave heavy light mesons,where the S–D mixing and η-η' mixing are explicitly included.Our calculation indicates that the observed X(3872) could be a loosely shallow molecular state composed of D*+ h.c,while neither Z_c(3900)/Z_c(4020) nor Z_b(10610)/Z_b(10650) is supported to be a molecule.Some observed possible molecular states are predicted,which could be searched for by further experimental measurements. 展开更多
关键词 meson quark charm explicitly strange flavor chiral mixing shallow Belle
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BESⅢ粲物理(英文)
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作者 马海龙 《中国科学技术大学学报》 CAS CSCD 北大核心 2016年第5期358-368,共11页
分析BESIII探测器在质心系能量3.773和4.599GeV采集的2.93和~0.567fb-1数据,报道了衰变常数fD^+和D介子半轻子衰变的形状因子,D^+→K^0_Sπ^+π~0的Dalitz图分析,D→K^0_S/Lπ^+π-和K-π^+强相差,D^0D^0混合参数yCP的测量;2体强子衰变D... 分析BESIII探测器在质心系能量3.773和4.599GeV采集的2.93和~0.567fb-1数据,报道了衰变常数fD^+和D介子半轻子衰变的形状因子,D^+→K^0_Sπ^+π~0的Dalitz图分析,D→K^0_S/Lπ^+π-和K-π^+强相差,D^0D^0混合参数yCP的测量;2体强子衰变D^0(^+)→ωπ~0(^+),稀有衰变D^0→γγ和D^+→K(π)±ee^+的寻找以及Λ^+c→Λe^+νe和12个强子衰变绝对分支比的测量. 展开更多
关键词 粲介(重)子 纯轻和半轻子衰变 强子衰变 稀有衰变 衰变常数 形状因子 强相角 夸克混合矩阵
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Experimental sensitivity on searching for CP violation at BES-Ⅲ
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作者 赵明刚 荣刚 +1 位作者 马海龙 张达华 《Chinese Physics B》 SCIE EI CAS CSCD 2009年第6期2213-2216,共4页
The CP violation in the D system is predicted to be an unobserved level in the Standard Model. In this paper, we describe the method of searching for CP violation decay processes with the coherently produced D^0D^0 me... The CP violation in the D system is predicted to be an unobserved level in the Standard Model. In this paper, we describe the method of searching for CP violation decay processes with the coherently produced D^0D^0 mesons from the ψ(3770) decay. The CP violation decay processes can be searched for at the BES-Ⅲ experiment. The experimental sensitivity for searching for the CP violation can reach about a 10^-4 level with a ψ(3770) data sample of about 20 fb^-1. 展开更多
关键词 CP violation charm meson BES-Ⅲ
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