All Order ′ Expansion of One-Loop Open-String Integrals
Aug 26, 20196 pages
Published in:
- Phys.Rev.Lett. 124 (2020) 10, 101603
- Published: Mar 13, 2020
e-Print:
- 1908.09848 [hep-th]
Report number:
- UUITP-34/19
View in:
Citations per year
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
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Figures(1)
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