An Update on Distribution Amplitudes of the Nucleon and its Parity Partner
R. W. Schiel, G. S. Bali, V. M. Braun, S. Collins, M. G\"ockeler, C., Hagen, R. Horsley, Y. Nakamura, D. Pleiter, P. E. L. Rakow, A. Sch\"afer, G., Schierholz, H. St\"uben, P. Wein, J. M. Zanotti
TL;DR
This paper updates the calculation of nucleon and N* (1535) distribution amplitudes using lattice QCD data, addressing finite size effects and employing chiral perturbation theory for physical extrapolation.
Contribution
It provides new lattice data on baryon wave functions and introduces improved methods for controlling finite size effects and extrapolating to the physical point.
Findings
New lattice data on nucleon and N* (1535) distribution amplitudes
Enhanced control over finite size effects
Successful chiral extrapolation to physical parameters
Abstract
The calculation of baryon wave functions at small inter-quark separations is an ongoing effort within the QCDSF collaboration. In this update on normalization constants and distribution amplitudes of the nucleon and its negative parity partner, N* (1535), we present new lattice data which helps us controlling finite size effects. We use new chiral perturbation theory results to perform the extrapolation to the physical point.
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