D-instantons, string field theory and two dimensional string theory

Abstract In [4] Balthazar, Rodriguez and Yin (BRY) computed the one instanton contribution to the two point scattering amplitude in two dimensional string theory to first subleading order in the string coupling. Their analysis left undetermined two constants due to divergences in the integration ove...

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Autor principal:	Ashoke Sen
Formato:	article
Lenguaje:	EN
Publicado:	SpringerOpen 2021
Materias:	D-branes String Field Theory Nuclear and particle physics. Atomic energy. Radioactivity QC770-798
Acceso en línea:	https://doaj.org/article/df4261979c0f47ca869f53e1d08239b6
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spelling	oai:doaj.org-article:df4261979c0f47ca869f53e1d08239b62021-11-14T12:40:34ZD-instantons, string field theory and two dimensional string theory10.1007/JHEP11(2021)0611029-8479https://doaj.org/article/df4261979c0f47ca869f53e1d08239b62021-11-01T00:00:00Zhttps://doi.org/10.1007/JHEP11(2021)061https://doaj.org/toc/1029-8479Abstract In [4] Balthazar, Rodriguez and Yin (BRY) computed the one instanton contribution to the two point scattering amplitude in two dimensional string theory to first subleading order in the string coupling. Their analysis left undetermined two constants due to divergences in the integration over world-sheet variables, but they were fixed by numerically comparing the result with that of the dual matrix model. If we consider n-point scattering amplitudes to the same order, there are actually four undetermined constants in the world-sheet approach. We show that using string field theory we can get finite unambiguous values of all of these constants, and we explicitly compute three of these four constants. Two of the three constants determined this way agree with the numerical result of BRY within the accuracy of numerical analysis, but the third constant seems to differ by 1/2. We also discuss a shortcut to determining the fourth constant if we assume the equality of the quantum corrected D-instanton action and the action of the matrix model instanton. This also agrees with the numerical result of BRY.Ashoke SenSpringerOpenarticleD-branesString Field TheoryNuclear and particle physics. Atomic energy. RadioactivityQC770-798ENJournal of High Energy Physics, Vol 2021, Iss 11, Pp 1-83 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	D-branes String Field Theory Nuclear and particle physics. Atomic energy. Radioactivity QC770-798
spellingShingle	D-branes String Field Theory Nuclear and particle physics. Atomic energy. Radioactivity QC770-798 Ashoke Sen D-instantons, string field theory and two dimensional string theory
description	Abstract In [4] Balthazar, Rodriguez and Yin (BRY) computed the one instanton contribution to the two point scattering amplitude in two dimensional string theory to first subleading order in the string coupling. Their analysis left undetermined two constants due to divergences in the integration over world-sheet variables, but they were fixed by numerically comparing the result with that of the dual matrix model. If we consider n-point scattering amplitudes to the same order, there are actually four undetermined constants in the world-sheet approach. We show that using string field theory we can get finite unambiguous values of all of these constants, and we explicitly compute three of these four constants. Two of the three constants determined this way agree with the numerical result of BRY within the accuracy of numerical analysis, but the third constant seems to differ by 1/2. We also discuss a shortcut to determining the fourth constant if we assume the equality of the quantum corrected D-instanton action and the action of the matrix model instanton. This also agrees with the numerical result of BRY.
format	article
author	Ashoke Sen
author_facet	Ashoke Sen
author_sort	Ashoke Sen
title	D-instantons, string field theory and two dimensional string theory
title_short	D-instantons, string field theory and two dimensional string theory
title_full	D-instantons, string field theory and two dimensional string theory
title_fullStr	D-instantons, string field theory and two dimensional string theory
title_full_unstemmed	D-instantons, string field theory and two dimensional string theory
title_sort	d-instantons, string field theory and two dimensional string theory
publisher	SpringerOpen
publishDate	2021
url	https://doaj.org/article/df4261979c0f47ca869f53e1d08239b6
work_keys_str_mv	AT ashokesen dinstantonsstringfieldtheoryandtwodimensionalstringtheory
_version_	1718429138745819136

D-instantons, string field theory and two dimensional string theory

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