All-order differential equations for one-loop closed-string integrals and modular graph forms
A bstract We investigate generating functions for the integrals over world-sheet tori appearing in closed-string one-loop amplitudes of bosonic, heterotic and type-II theories. These closed-string integrals are shown to obey homogeneous and linear differential equations in the modular parameter of t...
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| Veröffentlicht in: | The journal of high energy physics Jg. 2020; H. 1; S. 64 - 74 |
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2020
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| ISSN: | 1029-8479, 1126-6708, 1029-8479 |
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| Abstract | A
bstract
We investigate generating functions for the integrals over world-sheet tori appearing in closed-string one-loop amplitudes of bosonic, heterotic and type-II theories. These closed-string integrals are shown to obey homogeneous and linear differential equations in the modular parameter of the torus. We spell out the first-order Cauchy-Riemann and second-order Laplace equations for the generating functions for any number of external states. The low-energy expansion of such torus integrals introduces infinite families of non-holomorphic modular forms known as modular graph forms. Our results generate homogeneous first- and second-order differential equations for arbitrary such modular graph forms and can be viewed as a step towards all-order low-energy expansions of closed-string integrals. |
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| AbstractList | We investigate generating functions for the integrals over world-sheet tori appearing in closed-string one-loop amplitudes of bosonic, heterotic and type-II theories. These closed-string integrals are shown to obey homogeneous and linear differential equations in the modular parameter of the torus. We spell out the first-order Cauchy-Riemann and second-order Laplace equations for the generating functions for any number of external states. The low-energy expansion of such torus integrals introduces infinite families of non-holomorphic modular forms known as modular graph forms. Our results generate homogeneous first- and second-order differential equations for arbitrary such modular graph forms and can be viewed as a step towards all-order low-energy expansions of closed-string integrals. Abstract We investigate generating functions for the integrals over world-sheet tori appearing in closed-string one-loop amplitudes of bosonic, heterotic and type-II theories. These closed-string integrals are shown to obey homogeneous and linear differential equations in the modular parameter of the torus. We spell out the first-order Cauchy-Riemann and second-order Laplace equations for the generating functions for any number of external states. The low-energy expansion of such torus integrals introduces infinite families of non-holomorphic modular forms known as modular graph forms. Our results generate homogeneous first- and second-order differential equations for arbitrary such modular graph forms and can be viewed as a step towards all-order low-energy expansions of closed-string integrals. A bstract We investigate generating functions for the integrals over world-sheet tori appearing in closed-string one-loop amplitudes of bosonic, heterotic and type-II theories. These closed-string integrals are shown to obey homogeneous and linear differential equations in the modular parameter of the torus. We spell out the first-order Cauchy-Riemann and second-order Laplace equations for the generating functions for any number of external states. The low-energy expansion of such torus integrals introduces infinite families of non-holomorphic modular forms known as modular graph forms. Our results generate homogeneous first- and second-order differential equations for arbitrary such modular graph forms and can be viewed as a step towards all-order low-energy expansions of closed-string integrals. |
| ArticleNumber | 64 |
| Author | Kleinschmidt, Axel Gerken, Jan E. Schlotterer, Oliver |
| Author_xml | – sequence: 1 givenname: Jan E. orcidid: 0000-0002-0172-7944 surname: Gerken fullname: Gerken, Jan E. email: jan.gerken@aei.mpg.de organization: Max-Planck-Institut für Gravitationsphysik, Albert-Einstein-Institut – sequence: 2 givenname: Axel surname: Kleinschmidt fullname: Kleinschmidt, Axel organization: Max-Planck-Institut für Gravitationsphysik, Albert-Einstein-Institut, International Solvay Institutes ULB-Campus Plaine CP231 – sequence: 3 givenname: Oliver orcidid: 0000-0002-1048-661X surname: Schlotterer fullname: Schlotterer, Oliver organization: Department of Physics and Astronomy, Uppsala University |
| BackLink | https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-407290$$DView record from Swedish Publication Index (Uppsala universitet) |
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bstract
We investigate generating functions for the integrals over world-sheet tori appearing in closed-string one-loop amplitudes of bosonic, heterotic and... We investigate generating functions for the integrals over world-sheet tori appearing in closed-string one-loop amplitudes of bosonic, heterotic and type-II... Abstract We investigate generating functions for the integrals over world-sheet tori appearing in closed-string one-loop amplitudes of bosonic, heterotic and... |
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| SubjectTerms | Conformal Field Models in String Theory Differential equations High energy physics Integrals Laplace equation Mathematical analysis Regular Article - Theoretical Physics Scattering Amplitudes Strings Superstrings and Heterotic Strings Toruses |
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| Title | All-order differential equations for one-loop closed-string integrals and modular graph forms |
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