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Title: θ and the η ' in large N supersymmetric QCD

Here, we study the large N θ dependence and the η' potential in supersymmetric QCD with small soft SUSY-breaking terms. Known exact results in SUSY QCD are found to reflect a variety of expectations from large N perturbation theory, including the presence of branches and the behavior of theories with matter (both with N f << N and N f ~ N ). But, there are also striking departures from ordinary QCD and the conventional large N description: instanton effects, when under control, are not exponentially suppressed at large N , and branched structure in supersymmetric QCD is always associated with approximate discrete symmetries. We suggest that these differences motivate further study of large N QCD on the lattice.
Authors:
ORCiD logo [1] ; ORCiD logo [2] ;  [1] ;  [1]
  1. Univ. of California, Santa Cruz, CA (United States). Santa Cruz Inst. for Particle Physics and Dept. of Physics
  2. Univ. of Massachusetts, Amherst, MA (United States). Amherst Center for Fundamental Interactions, Dept. of Physics
Publication Date:
Grant/Contract Number:
FG02-04ER41286
Type:
Accepted Manuscript
Journal Name:
Journal of High Energy Physics (Online)
Additional Journal Information:
Journal Name: Journal of High Energy Physics (Online); Journal Volume: 2017; Journal Issue: 5; Journal ID: ISSN 1029-8479
Publisher:
Springer Berlin
Research Org:
Univ. of California, Santa Cruz, CA (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; Phase Diagram of QCD; Supersymmetric Effective Theories
OSTI Identifier:
1389559

Dine, Michael, Draper, Patrick, Stephenson-Haskins, Laurel, and Xu, Di. θ and the η ' in large N supersymmetric QCD. United States: N. p., Web. doi:10.1007/JHEP05(2017)122.
Dine, Michael, Draper, Patrick, Stephenson-Haskins, Laurel, & Xu, Di. θ and the η ' in large N supersymmetric QCD. United States. doi:10.1007/JHEP05(2017)122.
Dine, Michael, Draper, Patrick, Stephenson-Haskins, Laurel, and Xu, Di. 2017. "θ and the η ' in large N supersymmetric QCD". United States. doi:10.1007/JHEP05(2017)122. https://www.osti.gov/servlets/purl/1389559.
@article{osti_1389559,
title = {θ and the η ' in large N supersymmetric QCD},
author = {Dine, Michael and Draper, Patrick and Stephenson-Haskins, Laurel and Xu, Di},
abstractNote = {Here, we study the large N θ dependence and the η' potential in supersymmetric QCD with small soft SUSY-breaking terms. Known exact results in SUSY QCD are found to reflect a variety of expectations from large N perturbation theory, including the presence of branches and the behavior of theories with matter (both with Nf << N and Nf ~ N ). But, there are also striking departures from ordinary QCD and the conventional large N description: instanton effects, when under control, are not exponentially suppressed at large N , and branched structure in supersymmetric QCD is always associated with approximate discrete symmetries. We suggest that these differences motivate further study of large N QCD on the lattice.},
doi = {10.1007/JHEP05(2017)122},
journal = {Journal of High Energy Physics (Online)},
number = 5,
volume = 2017,
place = {United States},
year = {2017},
month = {5}
}