D-instanton perturbation theory
Abstract D-instanton world-volume theory has open string zero modes describing collective coordinates of the instanton. The usual perturbative amplitudes in the D-instanton background suffer from infra-red divergences due to the presence of these zero modes, and the usual approach of analytic contin...
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| Format: | Article |
| Language: | English |
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SpringerOpen
2020-08-01
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| Series: | Journal of High Energy Physics |
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| Online Access: | http://link.springer.com/article/10.1007/JHEP08(2020)075 |
| _version_ | 1818292190189715456 |
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| author | Ashoke Sen |
| author_facet | Ashoke Sen |
| author_sort | Ashoke Sen |
| collection | DOAJ |
| description | Abstract D-instanton world-volume theory has open string zero modes describing collective coordinates of the instanton. The usual perturbative amplitudes in the D-instanton background suffer from infra-red divergences due to the presence of these zero modes, and the usual approach of analytic continuation in momenta does not work since all open string states on a D-instanton carry strictly zero momentum. String field theory is well-suited for tackling these issues. However we find a new subtlety due to the existence of additional zero modes in the ghost sector. This causes a breakdown of the Siegel gauge, but a different gauge fixing consistent with the BV formalism renders the perturbation theory finite and unambiguous. At each order, this produces extra contribution to the amplitude besides what is obtained from integration over the moduli space of Riemann surfaces. |
| first_indexed | 2024-12-13T02:56:01Z |
| format | Article |
| id | doaj.art-16dd9538416b45b9aa78310c21233898 |
| institution | Directory Open Access Journal |
| issn | 1029-8479 |
| language | English |
| last_indexed | 2024-12-13T02:56:01Z |
| publishDate | 2020-08-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj.art-16dd9538416b45b9aa78310c212338982022-12-22T00:01:57ZengSpringerOpenJournal of High Energy Physics1029-84792020-08-012020812010.1007/JHEP08(2020)075D-instanton perturbation theoryAshoke Sen0Harish-Chandra Research Institute, HBNIAbstract D-instanton world-volume theory has open string zero modes describing collective coordinates of the instanton. The usual perturbative amplitudes in the D-instanton background suffer from infra-red divergences due to the presence of these zero modes, and the usual approach of analytic continuation in momenta does not work since all open string states on a D-instanton carry strictly zero momentum. String field theory is well-suited for tackling these issues. However we find a new subtlety due to the existence of additional zero modes in the ghost sector. This causes a breakdown of the Siegel gauge, but a different gauge fixing consistent with the BV formalism renders the perturbation theory finite and unambiguous. At each order, this produces extra contribution to the amplitude besides what is obtained from integration over the moduli space of Riemann surfaces.http://link.springer.com/article/10.1007/JHEP08(2020)075D-branesString Field Theory |
| spellingShingle | Ashoke Sen D-instanton perturbation theory Journal of High Energy Physics D-branes String Field Theory |
| title | D-instanton perturbation theory |
| title_full | D-instanton perturbation theory |
| title_fullStr | D-instanton perturbation theory |
| title_full_unstemmed | D-instanton perturbation theory |
| title_short | D-instanton perturbation theory |
| title_sort | d instanton perturbation theory |
| topic | D-branes String Field Theory |
| url | http://link.springer.com/article/10.1007/JHEP08(2020)075 |
| work_keys_str_mv | AT ashokesen dinstantonperturbationtheory |