E-resources
-
Ke, Hong-Wei; Han, Xin; Liu, Xiao-Hai; Shi, Yan-Liang
The European physical journal. C, Particles and fields, 05/2021, Volume: 81, Issue: 5Journal Article
Recently LHCb declared a new structure X (6900) in the final state di- J / ψ which is popularly regarded as a cc - c ¯ c ¯ tetraquark state. Within the Bethe–Salpeter (B–S) framework we study the possible cc - c ¯ c ¯ bound states and the interaction between diquark ( cc ) and antidiquark ( c ¯ c ¯ ). In this work cc ( c ¯ c ¯ ) is treated as a color anti-triplet (triplet) axial-vector so the quantum numbers of cc - c ¯ c ¯ bound state are 0 + , 1 + and 2 + . Learning from the interaction in meson case and using the effective coupling we suggest the interaction kernel for the diquark and antidiquark system. Then we deduce the B–S equations for different quantum numbers. Solving these equations numerically we find the spectra of some excited states can be close to the mass of X (6900) when we assign appropriate values for parameter κ introduced in the interaction (kernel). We also briefly calculate the spectra of bb - b ¯ b ¯ bound states. Future measurement of bb - b ¯ b ¯ state will help us to determine the exact form of effective interaction.
Shelf entry
Permalink
- URL:
Impact factor
Access to the JCR database is permitted only to users from Slovenia. Your current IP address is not on the list of IP addresses with access permission, and authentication with the relevant AAI accout is required.
Year | Impact factor | Edition | Category | Classification | ||||
---|---|---|---|---|---|---|---|---|
JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
Select the library membership card:
If the library membership card is not in the list,
add a new one.
DRS, in which the journal is indexed
Database name | Field | Year |
---|
Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
---|
Source: Personal bibliographies
and: SICRIS
The material is available in full text. If you wish to order the material anyway, click the Continue button.