Peaks within peaks and the possible two-peak structure of the $P_c(4457)$: the effective field theory perspective
| dc.contributor.author | PENG, Fang-Zheng | |
| dc.contributor.author | LU, Jun-Xu | |
| hal.structure.identifier | Centre d'Etudes Nucléaires de Bordeaux Gradignan [CENBG] | |
| dc.contributor.author | SÁNCHEZ SÁNCHEZ, Mario | |
| dc.contributor.author | YAN, Mao-Jun | |
| dc.contributor.author | PAVON VALDERRAMA, Manuel | |
| dc.date.issued | 2021 | |
| dc.description.abstractEn | The LHCb pentaquarks—the Pc(4312), Pc(4440), and Pc(4457)—have been theorized to be ΣcD¯ and ΣcD¯* S-wave molecules. Here, we explore the possibility that two of these pentaquarks—the Pc(4440) and Pc(4457)—contain in addition a Λc(2595)D¯ component in the P-wave. We will analyze the effects of this extra channel within two effective field theories: the first one will be a standard contact-range effective field theory, and the second one will include the nondiagonal pion dynamics connecting the ΣcD¯* and Λc(2595)D¯ channels, which happens to be unusually long ranged. The impact of the coupled-channel dynamics between the ΣcD¯* and Λc(2595)D¯ components is modest at best for the Pc(4440) and Pc(4457), which will remain predominantly ΣcD¯* molecules. However, if the quantum numbers of the Pc(4457) are JP=12-, the coupled-channel dynamics is likely to induce the binding of a Λ(2595)D¯ S-wave molecule (coupled to ΣcD¯* in the P-wave) with JP=12+ and a mass similar to the Pc(4457). If this is the case, the Pc(4457) could actually be a double peak containing two different pentaquark states. | |
| dc.language.iso | en | |
| dc.subject.en | Strong Interactions | |
| dc.subject.en | pentaquark | |
| dc.subject.en | coupled channel | |
| dc.subject.en | partial wave | |
| dc.subject.en | effective field theory | |
| dc.subject.en | renormalization | |
| dc.subject.en | regularization | |
| dc.subject.en | quantum number | |
| dc.subject.en | LHC-B | |
| dc.subject.en | numerical calculations | |
| dc.title.en | Peaks within peaks and the possible two-peak structure of the $P_c(4457)$: the effective field theory perspective | |
| dc.type | Article de revue | |
| dc.identifier.doi | 10.1103/PhysRevD.103.014023 | |
| dc.subject.hal | Physique [physics]/Physique des Hautes Energies - Phénoménologie [hep-ph] | |
| dc.subject.hal | Physique [physics]/Physique des Hautes Energies - Expérience [hep-ex] | |
| dc.subject.hal | Physique [physics]/Physique Nucléaire Théorique [nucl-th] | |
| dc.identifier.arxiv | 2007.01198 | |
| bordeaux.journal | Phys.Rev.D | |
| bordeaux.page | 014023 | |
| bordeaux.volume | 103 | |
| bordeaux.issue | 1 | |
| bordeaux.peerReviewed | oui | |
| hal.identifier | hal-02905281 | |
| hal.version | 1 | |
| hal.popular | non | |
| hal.audience | Internationale | |
| hal.origin.link | https://hal.archives-ouvertes.fr//hal-02905281v1 | |
| bordeaux.COinS | ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Phys.Rev.D&rft.date=2021&rft.volume=103&rft.issue=1&rft.spage=014023&rft.epage=014023&rft.au=PENG,%20Fang-Zheng&LU,%20Jun-Xu&S%C3%81NCHEZ%20S%C3%81NCHEZ,%20Mario&YAN,%20Mao-Jun&PAVON%20VALDERRAMA,%20Manuel&rft.genre=article |
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