New Λb(6072)0 state as a 2S bottom baryon

2020/05/31 by K. Azizi, Y. Sarac, H. Sundu · 2 citations
Physics and Astronomy · #Atomic physics #Baryon #Coupling (piping) #Coupling constant #Excitation #Excited state #Hadron #High-Energy Particle Collisions Research #Lambda #Materials science #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Quantum mechanics #Quark #Quark model #hep-ex #hep-lat #hep-ph

paper · pdf · doi:10.1103/physrevd.102.034007

published as Phys. Rev. D 102, 034007 (2020) · 9 Pages, 3 Figures and 2 Tables

openalex created_date 2020/05/21 · openalex publication_date 2020/08/07 · arxiv created 2020/08/08 · arxiv updated 2020/08/12 · openalex updated_date 2026/08/05

Abstract

As a result of continuous developments, the recent experimental searches lead to the observations of new particles at different hadronic channels. Among these hadrons are the excited states of the heavy baryons containing single bottom or charmed quark in their valance quark content. The recently observed \mathrm\ensuremathΛ_b(6072)⁰ state is one of these baryons and possibly 2S radial excitation of the \mathrm\ensuremathΛ_b state. Considering this information from the experiment, we conduct a QCD sum rule analysis on this state and calculate its mass and current coupling constant considering it as a 2S radially excited \mathrm\ensuremathΛ_b resonance. For completeness, in the analyses, we also compute the mass and current coupling constant for the ground state \mathrm\ensuremathΛ_b⁰ and its first orbital excitation. We also consider the \mathrm\ensuremathΛ_c⁺ counterpart of each state and attain their mass, as well. The obtained results are consistent with the experimental data as well as existing theoretical predictions.

Citations

• Progress towards understanding baryon resonances
• Masses of excited heavy baryons in the relativistic quark–diquark picture
• Faddeev study of heavy-baryon spectroscopy
• Strong and radiative decays of heavy flavored baryons
• Strong decays of charmed baryons in heavy hadron chiral perturbation theory
• Charmed baryons in a relativistic quark model
• One-photon transitions between heavy baryons in a relativistic three-quark model
• A review of the open charm and open bottom systems
• Observation of five new narrow Ω_c⁰ states decaying to Ξ_c⁺ K^-
• Decay properties of P-wave charmed baryons from light-cone QCD sum rules
• Study of P-wave excitations of observed charmed strange baryons
• Review of Particle Physics
• Analysis of the verticesΩQ*ΩQϕand radiative decaysΩQ*→ΩQγ

Cited by

• Spectroscopic properties of 1F-wave singly bottom baryons
• Analysis of the 1S and 2S states of Λ Q and Ξ Q with QCD sum rules *