Decay chain information on the newly discovered double charm baryon state Ξcc + +

Thomas Gutsche, Mikhail A. Ivanov, Jürgen G. Körner, Valery E. Lyubovitskij

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

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 (Λc+K-π+π+) as being at the origin of the decay chain Ξcc++→Σc++(→Λc+π+)+K̄∗0(→K-π+). The nonleptonic decay Ξcc++→Σc+++K̄∗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 Ξcc++→Σc++ induced by the effective (c→u) current. We then proceed to calculate the rate of the decay as well as the polarization of the Σc++ and Λc+ baryons and the longitudinal/transverse composition of the K̄∗0. We estimate the decay Ξcc++→Σc++K̄∗0 to have a branching rate of B(Ξcc++→Σc++K̄∗0)∼10.5%. As a byproduct of our investigation we have also analyzed the decay Ξcc++→Σc++K̄0 for which we find a branching ratio of B(Ξcc++→Σc++K̄0)∼2.5%.

Original languageEnglish
Article number054013
JournalPhysical Review D
Volume96
Issue number5
DOIs
Publication statusPublished - 1 Sep 2017

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baryons
decay
quark models
mass distribution
contamination
quarks
polarization
estimates

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Decay chain information on the newly discovered double charm baryon state Ξcc + +. / Gutsche, Thomas; Ivanov, Mikhail A.; Körner, Jürgen G.; Lyubovitskij, Valery E.

In: Physical Review D, Vol. 96, No. 5, 054013, 01.09.2017.

Research output: Contribution to journalArticle

Gutsche, Thomas ; Ivanov, Mikhail A. ; Körner, Jürgen G. ; Lyubovitskij, Valery E. / Decay chain information on the newly discovered double charm baryon state Ξcc + +. In: Physical Review D. 2017 ; Vol. 96, No. 5.
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