On the origin of divergences in time-dependent orbifolds
Abstract We consider time-dependent orbifolds in String Theory and we show that divergences are not associated with a gravitational backreaction since they appear in the open string sector too. They are related to the non existence of the underlying effective field theory as in several cases fourth...
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2020-05-01
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Series: | European Physical Journal C: Particles and Fields |
Online Access: | http://link.springer.com/article/10.1140/epjc/s10052-020-8010-y |
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doaj-205aff870f3e47a8b95a3bac9c530da32020-11-25T03:26:55ZengSpringerOpenEuropean Physical Journal C: Particles and Fields1434-60441434-60522020-05-0180512810.1140/epjc/s10052-020-8010-yOn the origin of divergences in time-dependent orbifoldsAndrea Arduino0Riccardo Finotello1Igor Pesando2Dipartimento di Fisica, I.N.F.N.-Sezione di Torino, Università di TorinoDipartimento di Fisica, I.N.F.N.-Sezione di Torino, Università di TorinoDipartimento di Fisica, I.N.F.N.-Sezione di Torino, Università di TorinoAbstract We consider time-dependent orbifolds in String Theory and we show that divergences are not associated with a gravitational backreaction since they appear in the open string sector too. They are related to the non existence of the underlying effective field theory as in several cases fourth and higher order contact terms do not exist. Since contact terms may arise from the exchange of string massive states, we investigate and show that some three points amplitudes with one massive state in the open string sector are divergent on the time-dependent orbifolds. To check that divergences are associated with the existence of a discrete zero eigenvalue of the Laplacian of the subspace with vanishing volume, we construct the Generalized Null Boost Orbifold where this phenomenon can be turned on and off.http://link.springer.com/article/10.1140/epjc/s10052-020-8010-y |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Andrea Arduino Riccardo Finotello Igor Pesando |
spellingShingle |
Andrea Arduino Riccardo Finotello Igor Pesando On the origin of divergences in time-dependent orbifolds European Physical Journal C: Particles and Fields |
author_facet |
Andrea Arduino Riccardo Finotello Igor Pesando |
author_sort |
Andrea Arduino |
title |
On the origin of divergences in time-dependent orbifolds |
title_short |
On the origin of divergences in time-dependent orbifolds |
title_full |
On the origin of divergences in time-dependent orbifolds |
title_fullStr |
On the origin of divergences in time-dependent orbifolds |
title_full_unstemmed |
On the origin of divergences in time-dependent orbifolds |
title_sort |
on the origin of divergences in time-dependent orbifolds |
publisher |
SpringerOpen |
series |
European Physical Journal C: Particles and Fields |
issn |
1434-6044 1434-6052 |
publishDate |
2020-05-01 |
description |
Abstract We consider time-dependent orbifolds in String Theory and we show that divergences are not associated with a gravitational backreaction since they appear in the open string sector too. They are related to the non existence of the underlying effective field theory as in several cases fourth and higher order contact terms do not exist. Since contact terms may arise from the exchange of string massive states, we investigate and show that some three points amplitudes with one massive state in the open string sector are divergent on the time-dependent orbifolds. To check that divergences are associated with the existence of a discrete zero eigenvalue of the Laplacian of the subspace with vanishing volume, we construct the Generalized Null Boost Orbifold where this phenomenon can be turned on and off. |
url |
http://link.springer.com/article/10.1140/epjc/s10052-020-8010-y |
work_keys_str_mv |
AT andreaarduino ontheoriginofdivergencesintimedependentorbifolds AT riccardofinotello ontheoriginofdivergencesintimedependentorbifolds AT igorpesando ontheoriginofdivergencesintimedependentorbifolds |
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