Decay chain information on the newly discovered double charm baryon state Ξ++cc
| Parent link: | Physical Review D: particles, fields, gravitation, and cosmology.— , 1970- Vol. 96, iss. 5.— 2017.— [054013, 6 p.] |
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| Other Authors: | , , , |
| Summary: | Title screen We interpret the new double charm baryon state found by the LHCb Collaboration in the invariant mass distribution of the set of final state particles (Λ+cK−π+π+) as being at the origin of the decay chain Ξ++cc→Σ++c(→Λ+cπ+)+¯K*0(→K−π+). The nonleptonic decay Ξ++cc→Σ++c+¯K*0 belongs to a class of decays where the quark flavor composition is such that the decay proceeds solely via the factorizing contribution precluding a contamination from internal W-exchange. We use the covariant confined quark model previously developed by us to calculate the four helicity amplitudes that describe the dynamics of the transition Ξ++cc→Σ++c induced by the effective (c→u) current. We then proceed to calculate the rate of the decay as well as the polarization of the Σ++c and Λ+c baryons and the longitudinal/transverse composition of the ¯K*0. We estimate the decay Ξ++cc→Σ++c¯K*0 to have a branching rate of B(Ξ++cc→Σ++c¯K*0)∼10.5%. As a byproduct of our investigation we have also analyzed the decay Ξ++cc→Σ++c¯K0 for which we find a branching ratio of B(Ξ++cc→Σ++c¯K0)∼2.5%. Режим доступа: по договору с организацией-держателем ресурса |
| Language: | English |
| Published: |
2017
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| Online Access: | https://doi.org/10.1103/PhysRevD.96.054013 |
| Format: | Electronic Book Chapter |
| KOHA link: | https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=658080 |