Configuration interaction matrix elements. I. Algebraic approach to the relationship between unitary group generators and permutations

1979 ◽  
Vol 16 (6) ◽  
pp. 1307-1319 ◽  
Author(s):  
P. E. S. Wormer ◽  
J. Paldus
Keyword(s):  
Configuration Interaction ◽  
Unitary Group ◽  
Algebraic Approach ◽  
Interaction Matrix ◽  
Matrix Elements ◽  
The Relationship

scholarly journals Double parton distributions in the pion from lattice QCD

2021 ◽  
Vol 2021 (2) ◽  
Author(s):  
Gunnar S. Bali ◽  
Luca Castagnini ◽  
Markus Diehl ◽  
Jonathan R. Gaunt ◽  
Benjamin Gläßle ◽  
...  
Keyword(s):  
Spatial Distribution ◽  
Lattice Qcd ◽  
Quark Mass ◽  
Matrix Elements ◽  
Parton Distributions ◽  
Almost All ◽  
The Relationship

Abstract We perform a lattice study of double parton distributions in the pion, using the relationship between their Mellin moments and pion matrix elements of two local currents. A good statistical signal is obtained for almost all relevant Wick contractions. We investigate correlations in the spatial distribution of two partons in the pion, as well as correlations involving the parton polarisation. The patterns we observe depend significantly on the quark mass. We investigate the assumption that double parton distributions approximately factorise into a convolution of single parton distributions.

Sign in / Sign up

Export Citation Format

Share Document