Lattice investigations of the chimera baryon spectrum in the Sp (4) gauge theory

Ed Bennett, Deog Ki Hong, Ho Hsiao, Jong Wan Lee, C. J.David Lin, Biagio Lucini, Maurizio Piai, Davide Vadacchino

研究成果: Article同行評審

5 引文 斯高帕斯(Scopus)

摘要

We report the results of lattice numerical studies of the Sp(4) gauge theory coupled to fermions (hyperquarks) transforming in the fundamental and two-index antisymmetric representations of the gauge group. This strongly coupled theory is the minimal candidate for the ultraviolet completion of composite Higgs models that facilitate the mechanism of partial compositeness for generating the top-quark mass. We measure the spectrum of the low-lying, half-integer spin, bound states composed of two fundamental and one antisymmetric hyperquarks, dubbed chimera baryons, in the quenched approximation. In this first systematic, nonperturbative study, we focus on the three lightest parity-even chimera-baryon states, in analogy with QCD, denoted as ΛCB, ςCB (both with spin 1/2), and ςCB∗ (with spin 3/2). The spin-1/2 such states are candidates of the top partners. The extrapolation of our results to the continuum and massless-hyperquark limit is performed using formulas inspired by QCD heavy-baryon Wilson chiral perturbation theory. Within the range of hyperquark masses in our simulations, we find that ςCB is not heavier than ΛCB.

原文English
文章編號094512
期刊Physical Review D
109
發行號9
DOIs
出版狀態Published - 1 5月 2024

指紋

深入研究「Lattice investigations of the chimera baryon spectrum in the Sp (4) gauge theory」主題。共同形成了獨特的指紋。

引用此