Newly observed $\Lambda_c(2860)^+$ at LHCb and its \emph{D}-wave partners $\Lambda_c(2880)^+$, $\Xi_c(3055)^+$ and $\Xi_c(3080)^+$

New resonance Λc(2860)+, reported by the LHCb Collaboration, is a key to establish the D-wave charmed and charmed-strange baryon families. In this work, we first carry out an analysis of mass spectra of the λ-mode excited charmed and charmed-strange baryon states, which may reveal the relation of Λc...

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Detalles Bibliográficos
Autores principales: Chen, Bing, Liu, Xiang, Zhang, Ailin
Lenguaje:eng
Publicado: 2017
Materias:
hep-ph
Particle Physics - Phenomenology
Acceso en línea:https://dx.doi.org/10.1103/PhysRevD.95.074022
http://cds.cern.ch/record/2759226
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author Chen, Bing
Liu, Xiang
Zhang, Ailin
author_facet Chen, Bing
Liu, Xiang
Zhang, Ailin
author_sort Chen, Bing
collection CERN
description New resonance Λc(2860)+, reported by the LHCb Collaboration, is a key to establish the D-wave charmed and charmed-strange baryon families. In this work, we first carry out an analysis of mass spectra of the λ-mode excited charmed and charmed-strange baryon states, which may reveal the relation of Λc(2860)+, Λc(2880)+, Ξc(3055)+, and Ξc(3080)+, i.e., Λc(2860)+ and Λc(2880)+ can form a D-wave doublet [3/2+,5/2+], while Ξc(3055)+ and Ξc(3080)+ are the strange partners of Λc(2860)+ and Λc(2880)+, respectively. Further study of their two-body Okubo-Zweig-Iizuka-allowed decays supports Λc(2860)+ and Ξc(3055)+ as the D-wave charmed and charmed-strange baryons, respectively, with JP=3/2+. For Λc(2880)+ and Ξc(3080)+, however, there exist some difficulties under the D-wave assignment with JP=5/2+, since the experimental widths, and some ratios of partial width of Λc(2880)+ and Ξc(3080)+, cannot be reproduced in our calculation.
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institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2017
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spelling cern-27592262023-07-16T02:11:56Zdoi:10.1103/PhysRevD.95.074022http://cds.cern.ch/record/2759226engChen, BingLiu, XiangZhang, AilinNewly observed $\Lambda_c(2860)^+$ at LHCb and its \emph{D}-wave partners $\Lambda_c(2880)^+$, $\Xi_c(3055)^+$ and $\Xi_c(3080)^+$hep-phParticle Physics - PhenomenologyNew resonance Λc(2860)+, reported by the LHCb Collaboration, is a key to establish the D-wave charmed and charmed-strange baryon families. In this work, we first carry out an analysis of mass spectra of the λ-mode excited charmed and charmed-strange baryon states, which may reveal the relation of Λc(2860)+, Λc(2880)+, Ξc(3055)+, and Ξc(3080)+, i.e., Λc(2860)+ and Λc(2880)+ can form a D-wave doublet [3/2+,5/2+], while Ξc(3055)+ and Ξc(3080)+ are the strange partners of Λc(2860)+ and Λc(2880)+, respectively. Further study of their two-body Okubo-Zweig-Iizuka-allowed decays supports Λc(2860)+ and Ξc(3055)+ as the D-wave charmed and charmed-strange baryons, respectively, with JP=3/2+. For Λc(2880)+ and Ξc(3080)+, however, there exist some difficulties under the D-wave assignment with JP=5/2+, since the experimental widths, and some ratios of partial width of Λc(2880)+ and Ξc(3080)+, cannot be reproduced in our calculation.New resonance $\Lambda_c(2860)^+$, reported by LHCb, is a key to establish \emph{D}-wave charmed and charmed-strange baryon families. In this work, we first carry out an analysis of mass spectra of the $\lambda$-mode excited charmed and charmed-strange baryon states, which may reveal the relation of $\Lambda_c(2860)^+$, $\Lambda_c(2880)^+$, $\Xi_c(3055)^+$ and $\Xi_c(3080)^+$, $i.e.$, $\Lambda_c(2860)^+$ and $\Lambda_c(2880)^+$ can form a \emph{D}-wave doublet $[3/2^+,5/2^+]$ while $\Xi_c(3055)^+$ and $\Xi_c(3080)^+$ are the strange partners of $\Lambda_c(2860)^+$ and $\Lambda_c(2880)^+$, respectively. Further study of their two-body Okubo-Zweig-Iizuka-allowed decays supports $\Lambda_c(2860)^+$ and $\Xi_c(3055)^+$ as the \emph{D}-wave charmed and charmed-strange baryons, respectively, with $J^P=3/2^+$. For $\Lambda_c(2880)^+$ and $\Xi_c(3080)^+$, however, there exist some difficulties under the \emph{D}-wave assignment with $J^P=5/2^+$ since the experimental widths and some ratios of partial width of $\Lambda_c(2880)^+$ and $\Xi_c(3080)^+$ cannot be reproduced in our calculation.arXiv:1702.04106oai:cds.cern.ch:27592262017-02-14
spellingShingle hep-ph
Particle Physics - Phenomenology
Chen, Bing
Liu, Xiang
Zhang, Ailin
Newly observed $\Lambda_c(2860)^+$ at LHCb and its \emph{D}-wave partners $\Lambda_c(2880)^+$, $\Xi_c(3055)^+$ and $\Xi_c(3080)^+$
title Newly observed $\Lambda_c(2860)^+$ at LHCb and its \emph{D}-wave partners $\Lambda_c(2880)^+$, $\Xi_c(3055)^+$ and $\Xi_c(3080)^+$
title_full Newly observed $\Lambda_c(2860)^+$ at LHCb and its \emph{D}-wave partners $\Lambda_c(2880)^+$, $\Xi_c(3055)^+$ and $\Xi_c(3080)^+$
title_fullStr Newly observed $\Lambda_c(2860)^+$ at LHCb and its \emph{D}-wave partners $\Lambda_c(2880)^+$, $\Xi_c(3055)^+$ and $\Xi_c(3080)^+$
title_full_unstemmed Newly observed $\Lambda_c(2860)^+$ at LHCb and its \emph{D}-wave partners $\Lambda_c(2880)^+$, $\Xi_c(3055)^+$ and $\Xi_c(3080)^+$
title_short Newly observed $\Lambda_c(2860)^+$ at LHCb and its \emph{D}-wave partners $\Lambda_c(2880)^+$, $\Xi_c(3055)^+$ and $\Xi_c(3080)^+$
title_sort newly observed $\lambda_c(2860)^+$ at lhcb and its \emph{d}-wave partners $\lambda_c(2880)^+$, $\xi_c(3055)^+$ and $\xi_c(3080)^+$
topic hep-ph
Particle Physics - Phenomenology
url https://dx.doi.org/10.1103/PhysRevD.95.074022
http://cds.cern.ch/record/2759226
work_keys_str_mv AT chenbing newlyobservedlambdac2860atlhcbanditsemphdwavepartnerslambdac2880xic3055andxic3080
AT liuxiang newlyobservedlambdac2860atlhcbanditsemphdwavepartnerslambdac2880xic3055andxic3080
AT zhangailin newlyobservedlambdac2860atlhcbanditsemphdwavepartnerslambdac2880xic3055andxic3080

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