Aug 8 – 13, 2022
Hörsaalzentrum Poppelsdorf
Europe/Berlin timezone

Resolving the NN controversy: a direct comparison of methods used for Luscher and the potential

Aug 12, 2022, 2:10 PM
CP1-HSZ/1st-1.004 - HS7 (CP1-HSZ)

CP1-HSZ/1st-1.004 - HS7


Oral Presentation Hadron Spectroscopy and Interactions Hadron Spectroscopy and Interactions


Amy Nicholson (UNC Chapel Hill)


An understanding of the nearly decades-long controversy between calculations of nucleon-nucleon interactions using the Luscher spectroscopy method and the HALQCD potential method has seen significant advancement in recent years due to the efforts of several groups. In particular, the use of improved operator methods has shed light on possible issues related to excited state contamination, while the first study of the lattice spacing dependence in a baryon-baryon system has shown large potential discretization systematics. In this talk, I will present a new study which compares the use of all methods in the literature for computing NN interactions on a single ensemble, in order to discriminate between excited state contamination and discretization effects, and discuss conclusions that this controversy has finally brought to light.

Primary authors

Aaron Meyer (University of California, Berkeley) Amy Nicholson (UNC Chapel Hill) Andre Walker-Loud (Lawrence Berkeley National Laboratory) Andrew Hanlon (BNL) Dr Christopher Koerber (Ruhr-Universitat Bochum) Colin Morningstar (Carnegie Mellon) Dr Dean Howarth (LBNL) Enrico Rinaldi (University of Michigan) Dr Ermal Rapaj (UC Berkeley) Evan Berkowitz (Forschungszentrum Jülich) Dr Henry Monge-Camacho (ORNL) John Bulava (DESY Zeuthen) Kate Clark (NVIDIA) Dr Kenneth McElvain (LBNL) Pavlos Vranas (Lawrence Livermore National Lab ) Ms Sarah Skinner (Carnegie Mellon)

Presentation materials