Two-Baryon Correlation Functions in 2-flavour QCD

2013/11/15 by Anthony Francis, Francis, Anthony, Chuan Miao +5
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Lattice (hep-lat) #Nuclear Theory (nucl-th) #hep-lat #nucl-th

paper · pdf · doi:10.48550/arxiv.1311.3933

7 pages, 10 figures, presented at "The 31st International Symposium on Lattice Field Theory" (Lattice 2013), 29 July - 3 August 2013, Mainz, Germany

arxiv created 2013/11/15 · arxiv updated 2013/11/18

Abstract

We present first results for two-baryon correlation functions, computed using N_f=2 flavours of O(a) improved Wilson quarks, with the aim of explaining potential dibaryon bound states, specifically the H-dibaryon. In particular, we use a GEVP to isolate the groundstate using two-baryon (hyperon-hyperon) correlation functions (⟨ C_XY(t)C_XY(0) ⟩, where XY=ΛΛ, ΣΣ, NΞ, ⋯), each of which has an overlap with the H-dibaryon. We employ a `blocking' algorithm to handle the large number of contractions, which may easily be extended to N-baryon correlation functions. We also comment on its application to the analysis of single baryon masses (n, Λ, Ξ, ⋯). This study is performed on an isotropic lattice with m_π= 460 MeV, m_πL = 4.7 and a = 0.063 fm.

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