All Order α\alpha′ Expansion of One-Loop Open-String Integrals

Aug 26, 2019
6 pages
Published in:
  • Phys.Rev.Lett. 124 (2020) 10, 101603
  • Published: Mar 13, 2020
e-Print:
Report number:
  • UUITP-34/19

Citations per year

201920202021202220230246810
Abstract: (APS)
We present a new method to evaluate the α′ expansion of genus-one integrals over open-string punctures and unravel the structure of the elliptic multiple zeta values in its coefficients. This is done by obtaining a simple differential equation of Knizhnik-Zamolodchikov-Bernard-type satisfied by generating functions of such integrals, and solving it via Picard iteration. The initial condition involves the generating functions at the cusp τ→i∞ and can be reduced to genus-zero integrals.
Note:
  • 6 pages, 2 figures
  • Elementary Particles and Fields
  • differential equations
  • boundary condition
  • string: open