A power series identity and Bessel-type integrals over unitary groups
Mathematical Physics
2019-03-27 v1 math.MP
Probability
Abstract
In 2008, Lehner, Wettig, Guhr and Wei conjectured a power series identity and showed that it implied a determinantal formula for a Bessel-type integral over the unitary supergroup. The integral is the supersymmetric extension of Bessel-type integrals over the unitary group appearing as partition functions in quantum chromodynamics. The identity is proved by interpreting both sides as the same unitary integral, which can be computed using the Cartan decomposition. An equivalent identity of Schur functions is also given and interpreted probabilistically.
Keywords
Cite
@article{arxiv.1806.02441,
title = {A power series identity and Bessel-type integrals over unitary groups},
author = {Jimmy He},
journal= {arXiv preprint arXiv:1806.02441},
year = {2019}
}
Comments
16 pages, 1 figure. Comments are welcome!