Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Bootstrapping Pions at Large $N$   We revisit from a modern bootstrap perspective the longstanding problem of
solving QCD in the large $N$ limit. We derive universal bounds on the effective
field theory of massless pions by imposing the full set of positivity
constraints that follow from $2 \to 2$ scattering. Some features of our
exclusion plots have intriguing connections with hadronic phenomenology. The
exclusion boundary exhibits a sharp kink, raising the tantalizing scenario that
large $N$ QCD may sit at this kink. We critically examine this possibility,
developing in the process a partial analytic understanding of the geometry of
the bounds.

12
The categories of this paper are: nucl-th
13
The categories of this paper are: quant-ph
11
The categories of this paper are: hep-lat
14
The categories of this paper are: math-ph
37
The categories of this paper are: supr-con
21
The categories of this paper are: adap-org
16
The categories of this paper are: stat
23
The categories of this paper are: solv-int
15
The categories of this paper are: nucl-ex
34
The categories of this paper are: chem-ph
5
The categories of this paper are: gr-qc
22
The categories of this paper are: chao-dyn
36
The categories of this paper are: cmp-lg
25
The categories of this paper are: patt-sol
2
The categories of this paper are: math
19
The categories of this paper are: eess