Extraction of ND scattering lengths from the Λb → π−pD0 decay and properties of the Σc(2800)+
The isovector and isoscalar ND s-wave scattering lengths are extracted by fitting to the LHCb data of the pD0 invariant-mass distribution in the decay Λb→π−pD0, making use of the cusp effect at the nD+ threshold. The analysis is based on a coupled-channel nonrelativistic effective field theory. We f...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2020-09-01
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| Series: | Physics Letters B |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0370269320304263 |
| _version_ | 1818007842280439808 |
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| author | Shuntaro Sakai Feng-Kun Guo Bastian Kubis |
| author_facet | Shuntaro Sakai Feng-Kun Guo Bastian Kubis |
| author_sort | Shuntaro Sakai |
| collection | DOAJ |
| description | The isovector and isoscalar ND s-wave scattering lengths are extracted by fitting to the LHCb data of the pD0 invariant-mass distribution in the decay Λb→π−pD0, making use of the cusp effect at the nD+ threshold. The analysis is based on a coupled-channel nonrelativistic effective field theory. We find that the real part of the isovector ND scattering length is unnaturally large due to the existence of a near-threshold state with a mass around 2.8 GeV. The state is consistent with the Σc(2800)+ resonance observed at Belle. Our results suggest that it couples strongly to the ND channel in an s-wave, and that its quantum numbers are JP=1/2−. The strong cusp behavior at the nD+ threshold can be verified using updated LHCb data. |
| first_indexed | 2024-04-14T05:21:05Z |
| format | Article |
| id | doaj.art-f76ac52115384fe78a274e94ea1faa19 |
| institution | Directory Open Access Journal |
| issn | 0370-2693 |
| language | English |
| last_indexed | 2024-04-14T05:21:05Z |
| publishDate | 2020-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Physics Letters B |
| spelling | doaj.art-f76ac52115384fe78a274e94ea1faa192022-12-22T02:10:12ZengElsevierPhysics Letters B0370-26932020-09-01808135623Extraction of ND scattering lengths from the Λb → π−pD0 decay and properties of the Σc(2800)+Shuntaro Sakai0Feng-Kun Guo1Bastian Kubis2CAS Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100190, ChinaCAS Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100190, China; School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China; Corresponding author.Helmholtz-Institut für Strahlen- und Kernphysik (Theorie) and Bethe Center for Theoretical Physics, Universität Bonn, 53115 Bonn, GermanyThe isovector and isoscalar ND s-wave scattering lengths are extracted by fitting to the LHCb data of the pD0 invariant-mass distribution in the decay Λb→π−pD0, making use of the cusp effect at the nD+ threshold. The analysis is based on a coupled-channel nonrelativistic effective field theory. We find that the real part of the isovector ND scattering length is unnaturally large due to the existence of a near-threshold state with a mass around 2.8 GeV. The state is consistent with the Σc(2800)+ resonance observed at Belle. Our results suggest that it couples strongly to the ND channel in an s-wave, and that its quantum numbers are JP=1/2−. The strong cusp behavior at the nD+ threshold can be verified using updated LHCb data.http://www.sciencedirect.com/science/article/pii/S0370269320304263ND scattering lengthsCharmed baryons |
| spellingShingle | Shuntaro Sakai Feng-Kun Guo Bastian Kubis Extraction of ND scattering lengths from the Λb → π−pD0 decay and properties of the Σc(2800)+ Physics Letters B ND scattering lengths Charmed baryons |
| title | Extraction of ND scattering lengths from the Λb → π−pD0 decay and properties of the Σc(2800)+ |
| title_full | Extraction of ND scattering lengths from the Λb → π−pD0 decay and properties of the Σc(2800)+ |
| title_fullStr | Extraction of ND scattering lengths from the Λb → π−pD0 decay and properties of the Σc(2800)+ |
| title_full_unstemmed | Extraction of ND scattering lengths from the Λb → π−pD0 decay and properties of the Σc(2800)+ |
| title_short | Extraction of ND scattering lengths from the Λb → π−pD0 decay and properties of the Σc(2800)+ |
| title_sort | extraction of nd scattering lengths from the λb π pd0 decay and properties of the σc 2800 |
| topic | ND scattering lengths Charmed baryons |
| url | http://www.sciencedirect.com/science/article/pii/S0370269320304263 |
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