Determination of the quantum numbers of Σb(6097)± via their strong decays

Aliev, T. M. (Physics Department, Middle East Technical University, 06531 Ankara, Turkey) ; Azizi, K. (Physics Department, Doğuş University, Acıbadem-Kadıköy, 34722 Istanbul, Turkey) ; Sarac, Y. (Electrical and Electronics Engineering Department, Atilim University, 06836 Ankara, Turkey) ; Sundu, H. (Department of Physics, Kocaeli University, 41380 Izmit, Turkey)

08 May 2019

Abstract: Recent experimental progress has led to the detection of many new hadrons. Very recently, the LHCb Collaboration announced the observation of two new Σb(6097)± states in the Λb0π± invariant mass distribution, which are considered to be the excited states of the ground-state Σb(*) baryon. Although almost all of the ground-state baryons have been observed, the fact that only a limited number of excited states have been observed makes them intriguing. Understanding the properties of the excited baryons would improve our knowledge about the strong interaction, as well as the nature and internal structures of these baryons. To specify the quantum numbers of the Σb(6097)± states, we analyze their strong decays to Λb0 and π± within the light-cone QCD sum rules formalism. To this end, they are considered as possible 1P or 2S excitations of either the ground-state Σb baryon with J=12 or the Σb* baryon with J=32, and their corresponding masses are calculated. The results of the analyses indicate that the Σb(6097)± baryons are excited 1P baryons with quantum numbers JP=32.

Published in: Physical Review D 99 (2019)
Published by: APS
DOI: 10.1103/PhysRevD.99.094003
arXiv: 1811.05686
License: CC-BY-4.0

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