2013 GRANADA DATABASE

Rodrigo Navarro-Perez, Enrique Ruiz Arriola, and José Enrique Amaro Soriano

Departament of Atomic, Molecular and Nuclear Physics

Institute of Theoretical and Computational Physics

University of Granada

Contents -------

Introduction

Using the database

Citation information

NN phase shifts

Download a table with our results

Publications

Papers where the database and PWA has been studied and used

NN database

Download the database

NN android apps

Educational PWA and demonstration and embedded database apps

Contact

Introduction -------

A succesful fit to pp and np scattering below the pion production threshold was achieved using a delta-shell representation for the short and intermediate range part of the nucleon-nucleon interaction. The long-range part was described by charge-dependent one-pion exchange and electromagnetic interactions.

A partial-wave decomposition of the potential allowed us to incorporate charge dependence in the ¹S₀ parameters. The rest of the parameters are charge independent. A comprehensive and ready-to-use review of the necessary theory to compute the full on-shell electromagnetic scattering amplitude was made. This includes every single EM contribution that turns out to be crucial for the correct description of pp and np scattering observables.

The 3*SIGMA criterion was used iteratively to obtain a fully consistent database with N=6713 data, including normalization data. The complete data selection process allowed us to recover a total of 300 data that a single application of the 3*SIGMA criterion would have rejected.

The fitting parameters, their uncertainties, and correlations were determined from the final consistent database. Errors in the potential can be propagated to other quantities obtained with the delta-shell representation. Phase shifts were extracted from the data and are presented here with the corresponding statistical error bars.