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Chen, GY; Huo, WS; Zhao, Q; Chen, GY (reprint author), Xinjiang Univ, Dept Phys, Urumqi 830046, Peoples R China.
Identifying the structure of near-threshold states from the line shape
Source PublicationCHINESE PHYSICS C
Language英语
Keywordx(3872) Effective Field Theory Compositeness
AbstractWe revisit the compositeness theorem proposed by Weinberg in an effective field theory (EFT) and explore criteria which are sensitive to the structure of S-wave threshold states. On a general basis, we show that the wave function renormalization constant Z, which is the probability of finding an elementary component in the wave function of a threshold state, can be explicitly introduced in the description of the threshold state. As an application of this EFT method, we describe the near-threshold line shape of the D*(0)(D) over bar (0) invariant mass spectrum in B -> D*(0)(D) over bar K-0 and determine a nonvanishing value of Z. It suggests that the X(3872) as a candidate of the D*(0)(D) over bar (0) molecule may still contain a small c (c) over bar core. This elementary component, on the one hand, explains its production in the B meson decay via a short-distance mechanism, and on the other hand, is correlated with the D*(0)(D) over bar (0) threshold enhancement observed in the D*(0)(D) over bar (0) invariant mass distributions. Meanwhile, we also show that if Z is non-zero, the near-threshold enhancement of the D*(0)(D) over bar (0) mass spectrum in the B decay will be driven by the short-distance production mechanism.
2015
Volume39Issue:9Pages:93101
Subject AreaPhysics
DOIhttp://dx.doi.org/10.1088/1674-1137/39/9/093101
Indexed BySCI
Funding OrganizationNational Natural Science Foundation of China [11147022, 11035006, 11305137] ; National Natural Science Foundation of China [11147022, 11035006, 11305137] ; National Natural Science Foundation of China [11147022, 11035006, 11305137] ; National Natural Science Foundation of China [11147022, 11035006, 11305137] ; Chinese Academy of Sciences [KJCX2-EW-N01] ; Chinese Academy of Sciences [KJCX2-EW-N01] ; Chinese Academy of Sciences [KJCX2-EW-N01] ; Chinese Academy of Sciences [KJCX2-EW-N01] ; Ministry of Science and Technology of China [2009CB825200] ; Ministry of Science and Technology of China [2009CB825200] ; Ministry of Science and Technology of China [2009CB825200] ; Ministry of Science and Technology of China [2009CB825200] ; DFG ; DFG ; DFG ; DFG ; NSFC [11261130311, CRC 110] ; NSFC [11261130311, CRC 110] ; NSFC [11261130311, CRC 110] ; NSFC [11261130311, CRC 110] ; Doctor Foundation of Xinjiang University [BS110104] ; Doctor Foundation of Xinjiang University [BS110104] ; Doctor Foundation of Xinjiang University [BS110104] ; Doctor Foundation of Xinjiang University [BS110104]
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Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/20881
CollectionSCI期刊论文
Corresponding AuthorChen, GY (reprint author), Xinjiang Univ, Dept Phys, Urumqi 830046, Peoples R China.
Recommended Citation
GB/T 7714
Chen, GY,Huo, WS,Zhao, Q,et al. Identifying the structure of near-threshold states from the line shape[J]. CHINESE PHYSICS C,2015,39(9):93101.
APA Chen, GY,Huo, WS,Zhao, Q,&Chen, GY .(2015).Identifying the structure of near-threshold states from the line shape.CHINESE PHYSICS C,39(9),93101.
MLA Chen, GY,et al."Identifying the structure of near-threshold states from the line shape".CHINESE PHYSICS C 39.9(2015):93101.
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