Canonical description of the new LHCb resonances
The LHCb Collaboration has recently observed four J/ψϕ structures called X(4140), X(4274), X(4500), and X(4700) in the B+→J/ψϕK+ decays. We study them herein using a nonrelativistic constituent quark model in which the degrees of freedom are quark-antiquark and meson-meson components. The X(4140) re...
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| Veröffentlicht in: | Physical review. D 2016-12, Vol.94 (11), Article 114018 |
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| creator | Ortega, Pablo G. Segovia, Jorge Entem, David R. Fernández, Francisco |
| description | The LHCb Collaboration has recently observed four J/ψϕ structures called X(4140), X(4274), X(4500), and X(4700) in the B+→J/ψϕK+ decays. We study them herein using a nonrelativistic constituent quark model in which the degrees of freedom are quark-antiquark and meson-meson components. The X(4140) resonance appears as a cusp in the J/ψϕ channel due to the near coincidence of the Ds±Ds*± and J/ψϕ mass thresholds. The remaining three [X(4274), X(4500), and X(4700)] appear as conventional charmonium states with quantum numbers 3P31, 4P30, and 5P30, respectively, and their masses and widths are slightly modified due to their coupling with the corresponding closest meson-meson thresholds. A particular feature of our quark model is a lattice-based screened linear confining interaction that has been constrained in the light-quark sector and usually produces higher excited heavy-quark states with lower masses than standard quark model predictions. |
| doi_str_mv | 10.1103/PhysRevD.94.114018 |
| format | Article |
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D</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Ortega, Pablo G.</au><au>Segovia, Jorge</au><au>Entem, David R.</au><au>Fernández, Francisco</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Canonical description of the new LHCb resonances</atitle><jtitle>Physical review. D</jtitle><date>2016-12-19</date><risdate>2016</risdate><volume>94</volume><issue>11</issue><artnum>114018</artnum><issn>2470-0010</issn><eissn>2470-0029</eissn><abstract>The LHCb Collaboration has recently observed four J/ψϕ structures called X(4140), X(4274), X(4500), and X(4700) in the B+→J/ψϕK+ decays. We study them herein using a nonrelativistic constituent quark model in which the degrees of freedom are quark-antiquark and meson-meson components. The X(4140) resonance appears as a cusp in the J/ψϕ channel due to the near coincidence of the Ds±Ds*± and J/ψϕ mass thresholds. The remaining three [X(4274), X(4500), and X(4700)] appear as conventional charmonium states with quantum numbers 3P31, 4P30, and 5P30, respectively, and their masses and widths are slightly modified due to their coupling with the corresponding closest meson-meson thresholds. A particular feature of our quark model is a lattice-based screened linear confining interaction that has been constrained in the light-quark sector and usually produces higher excited heavy-quark states with lower masses than standard quark model predictions.</abstract><cop>College Park</cop><pub>American Physical Society</pub><doi>10.1103/PhysRevD.94.114018</doi></addata></record> |
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| ispartof | Physical review. D, 2016-12, Vol.94 (11), Article 114018 |
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| language | eng |
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| source | APS_美国物理学会期刊 |
| subjects | Confining Quantum numbers Quark models Quarks Thresholds |
| title | Canonical description of the new LHCb resonances |
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