Records 
Author 
Donnay, L.; Giribet, G.; González, H.; Puhm, A.; Rojas, F. 
Title 
Celestial open strings at oneloop 
Type 

Year 
2023 
Publication 
Journal Of High Energy Physics 
Abbreviated Journal 
J. High Energy Phys. 
Volume 

Issue 
10 
Pages 
47 
Keywords 
Scattering AmplitudesSuperstrings and Heterotic StringsConformal and W Symmetry 
Abstract 
We study celestial amplitudes in string theory at oneloop. Celestial amplitudes describe scattering processes of boost eigenstates and relate to amplitudes in the more standard basis of momentum eigenstates through a Mellin transform. They are thus sensitive to both the ultraviolet and the infrared, which raises the question of how to appropriately take the field theory limit of string amplitudes in the celestial basis. We address this problem in the context of fourdimensional genusone scattering processes of gluons in open string theory which reach the twodimensional celestial sphere at null infinity. We show that the Mellin transform commutes with the adequate limit in the worldsheet moduli space and reproduces the celestial oneloop field theory amplitude expressed in the worldline formalism. The dependence on alpha ' continues to be a simple overall factor in oneloop celestial amplitudes albeit with a power that is shifted with respect to treelevel, thus making manifest that the dimensionless parameter g102/alpha ' 3\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{69pt} \begin{document}$$ {g}_{10}<^>2/{\alpha}<^>{\prime 3} $$\end{document} organizes the loop expansion in the celestial basis. The precise way in which the amplitudes scale with this parameter depends on the number of noncompact dimensions in such a way that in 4 dimensions the scaling with alpha ' does agree with that at treelevel. 
Address 

Corporate Author 

Thesis 

Publisher 

Place of Publication 

Editor 

Language 

Summary Language 

Original Title 

Series Editor 

Series Title 

Abbreviated Series Title 

Series Volume 

Series Issue 

Edition 

ISSN 
10298479 
ISBN 

Medium 

Area 

Expedition 

Conference 

Notes 
WOS:001079303500002 
Approved 

Call Number 
UAI @ alexi.delcanto @ 
Serial 
1895 
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Author 
Concha, P.; Merino, N.; Miskovic, O.; Rodriguez, E.; SalgadoRebolledo, P.; Valdivia, O. 
Title 
Asymptotic symmetries of threedimensional ChernSimons gravity for the Maxwell algebra 
Type 

Year 
2018 
Publication 
Journal Of High Energy Physics 
Abbreviated Journal 
J. High Energy Phys. 
Volume 

Issue 
10 
Pages 
22 pp 
Keywords 
Conformal and W Symmetry; SpaceTime Symmetries; Gaugegravity correspondence; Classical Theories of Gravity 
Abstract 
We study a threedimensional ChernSimons gravity theory based on the Maxwell algebra. We find that the boundary dynamics is described by an enlargement and deformation of the bms(3) algebra with three independent central charges. This symmetry arises from a gravity action invariant under the local Maxwell group and is characterized by presence of Abelian generators which modify the commutation relations of the supertranslations in the standard bms(3) algebra. Our analysis is based on the charge algebra of the theory in the BMS gauge, which includes the known solutions of standard asymptotically flat case. The field content of the theory is different than the one of General Relativity, but it includes all its geometries as particular solutions. In this line, we also study the stationary solutions of the theory in ADM form and we show that the vacuum energy and the vacuum angular momentum of the stationary configuration are influenced by the presence of the gravitational Maxwell field. 
Address 
[Valdivia, Omar] Univ Arturo Prat, Fac Ingn & Arquitectura, Iquique, Chile, Email: patrick.concha@pucv.cl; 
Corporate Author 

Thesis 

Publisher 
Springer 
Place of Publication 

Editor 

Language 
English 
Summary Language 

Original Title 

Series Editor 

Series Title 

Abbreviated Series Title 

Series Volume 

Series Issue 

Edition 

ISSN 
10298479 
ISBN 

Medium 

Area 

Expedition 

Conference 

Notes 
WOS:000448433900006 
Approved 

Call Number 
UAI @ eduardo.moreno @ 
Serial 
923 
Permanent link to this record 