Strong Coupling Constants of Negative Parity Heavy Baryons with π and K Mesons

T M Aliev,S Bilmis,M Savci

doi:10.1155/2017/2493140

T M Aliev, S Bilmis + Show 1 more

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https://doi.org/10.1155/2017/2493140

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Abstract

The strong coupling constants of negative parity heavy baryons belonging to sextet and antitriplet representations of SUf(3) with light π and K mesons are estimated within the light cone QCD sum rules. It is observed that each class of the sextet-sextet, sextet-antitriplet, and antitriplet-antitriplet transitions can be described by only one corresponding function. The pollution arising from the positive to positive, positive to negative, and negative to positive parity baryons transitions is eliminated by constructing sum rules for different Lorentz structures. The obtained coupling constants are compared with the ones for the positive parity heavy baryons.

Highlights

Recent years have been very productive in heavy baryon spectroscopy
We stress that the observation of new Ωc baryons paves the way for focusing on the studies of the properties of the negative parity baryons
Present work is devoted to the calculation of the strong coupling constants of negative parity heavy baryons with pseudoscalar π and K mesons within the light cone QCD sum rules (LCSR)

Summary

Introduction

Recent years have been very productive in heavy baryon spectroscopy. The new states with JP = (1/2)+ (Λ+c, Ξ+c ) and JP = (1/2)− (Λ+c(2593), Ξ+c (2790), Ξ0c (2790)) as well as JP = (1/2)+ (Ω(c∗), Σ(c∗)) and JP = (3/2)+ (Ξ(c∗)) states have been discovered [1]. A better way to distinguish the particles with different parity from the same final state is studying various decay channels, where one of the main parameters is the strong coupling constant. Present work is devoted to the calculation of the strong coupling constants of negative parity heavy baryons with pseudoscalar π and K mesons within the light cone QCD sum rules (LCSR) (see, e.g., [4]). Note that the coupling constants of positive parity heavy baryons with π and K mesons are calculated in [5]. A comparison study of strong decay constants for positive and negative parity states gives insight into underlying QCD dynamics at large distance.

Theoretical Framework

Numerical Analysis

Conclusion