Resolving the low mass puzzle of $$\Lambda _c(2940)^+$$ Λc(2940)+
Abstract For the long standing low mass puzzle of $$\Lambda _c(2940)^+$$ Λc(2940)+ , we propose an unquenched picture. Our calculation explicitly shows that the mass of the $$\Lambda _c(2P,3/2^-)$$ Λc(2P,3/2-) state can be lowered down to be consistent with the experimental data of $$\Lambda _c(2940...
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2020-04-01
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Series: | European Physical Journal C: Particles and Fields |
Online Access: | http://link.springer.com/article/10.1140/epjc/s10052-020-7874-1 |
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doaj-5126bdf0f4074874a98db45c2f77a9e22020-11-25T02:19:14ZengSpringerOpenEuropean Physical Journal C: Particles and Fields1434-60441434-60522020-04-018041610.1140/epjc/s10052-020-7874-1Resolving the low mass puzzle of $$\Lambda _c(2940)^+$$ Λc(2940)+Si-Qiang Luo0Bing Chen1Zhan-Wei Liu2Xiang Liu3School of Physical Science and Technology, Lanzhou UniversitySchool of Electrical and Electronic Engineering, Anhui Science and Technology UniversitySchool of Physical Science and Technology, Lanzhou UniversitySchool of Physical Science and Technology, Lanzhou UniversityAbstract For the long standing low mass puzzle of $$\Lambda _c(2940)^+$$ Λc(2940)+ , we propose an unquenched picture. Our calculation explicitly shows that the mass of the $$\Lambda _c(2P,3/2^-)$$ Λc(2P,3/2-) state can be lowered down to be consistent with the experimental data of $$\Lambda _c(2940)^+$$ Λc(2940)+ by introducing the $$D^*N$$ D∗N channel contribution. It means that the low mass puzzle of $$\Lambda _c(2940)^+$$ Λc(2940)+ can be solved. What is more important is that we predict a mass inversion relation for the 2P $$\Lambda _{c}^+$$ Λc+ states, i.e., the $$\Lambda _c(2P,1/2^-)$$ Λc(2P,1/2-) state is higher than the $$\Lambda _c(2P,3/2^-)$$ Λc(2P,3/2-) , which is totally different from the result of conventional quenched quark model. It provides a criterion to test such an unquenched scenario for $$\Lambda _c(2940)^+$$ Λc(2940)+ . We expect the future experimental progress from the LHCb and Belle II.http://link.springer.com/article/10.1140/epjc/s10052-020-7874-1 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Si-Qiang Luo Bing Chen Zhan-Wei Liu Xiang Liu |
spellingShingle |
Si-Qiang Luo Bing Chen Zhan-Wei Liu Xiang Liu Resolving the low mass puzzle of $$\Lambda _c(2940)^+$$ Λc(2940)+ European Physical Journal C: Particles and Fields |
author_facet |
Si-Qiang Luo Bing Chen Zhan-Wei Liu Xiang Liu |
author_sort |
Si-Qiang Luo |
title |
Resolving the low mass puzzle of $$\Lambda _c(2940)^+$$ Λc(2940)+ |
title_short |
Resolving the low mass puzzle of $$\Lambda _c(2940)^+$$ Λc(2940)+ |
title_full |
Resolving the low mass puzzle of $$\Lambda _c(2940)^+$$ Λc(2940)+ |
title_fullStr |
Resolving the low mass puzzle of $$\Lambda _c(2940)^+$$ Λc(2940)+ |
title_full_unstemmed |
Resolving the low mass puzzle of $$\Lambda _c(2940)^+$$ Λc(2940)+ |
title_sort |
resolving the low mass puzzle of $$\lambda _c(2940)^+$$ λc(2940)+ |
publisher |
SpringerOpen |
series |
European Physical Journal C: Particles and Fields |
issn |
1434-6044 1434-6052 |
publishDate |
2020-04-01 |
description |
Abstract For the long standing low mass puzzle of $$\Lambda _c(2940)^+$$ Λc(2940)+ , we propose an unquenched picture. Our calculation explicitly shows that the mass of the $$\Lambda _c(2P,3/2^-)$$ Λc(2P,3/2-) state can be lowered down to be consistent with the experimental data of $$\Lambda _c(2940)^+$$ Λc(2940)+ by introducing the $$D^*N$$ D∗N channel contribution. It means that the low mass puzzle of $$\Lambda _c(2940)^+$$ Λc(2940)+ can be solved. What is more important is that we predict a mass inversion relation for the 2P $$\Lambda _{c}^+$$ Λc+ states, i.e., the $$\Lambda _c(2P,1/2^-)$$ Λc(2P,1/2-) state is higher than the $$\Lambda _c(2P,3/2^-)$$ Λc(2P,3/2-) , which is totally different from the result of conventional quenched quark model. It provides a criterion to test such an unquenched scenario for $$\Lambda _c(2940)^+$$ Λc(2940)+ . We expect the future experimental progress from the LHCb and Belle II. |
url |
http://link.springer.com/article/10.1140/epjc/s10052-020-7874-1 |
work_keys_str_mv |
AT siqiangluo resolvingthelowmasspuzzleoflambdac2940lc2940 AT bingchen resolvingthelowmasspuzzleoflambdac2940lc2940 AT zhanweiliu resolvingthelowmasspuzzleoflambdac2940lc2940 AT xiangliu resolvingthelowmasspuzzleoflambdac2940lc2940 |
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1724877444712759296 |