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Title:

The structure of n-point one-loop open superstring amplitudes

Description:

In this article we investigate one-loop amplitudes in maximally supersymmetric superstring theory. The non-anomalous part of the worldsheet integrand is presented for any number of massless open-string states. The polarization dependence is organized into the same BRST-invariant kinematic combinations which also govern the leading string correct...

In this article we investigate one-loop amplitudes in maximally supersymmetric superstring theory. The non-anomalous part of the worldsheet integrand is presented for any number of massless open-string states. The polarization dependence is organized into the same BRST-invariant kinematic combinations which also govern the leading string correction to tree-level amplitudes. The dimensions of the bases for both the kinematics and the associated worldsheet integrals is found to be the unsigned Stirling number
S3n−1
$$ {S}_3^{n-1} $$ of first kind. We explain why the same combinatorial structures govern on the one hand finite one-loop amplitudes of equal helicity states in pure Yang-Mills theory and on the other hand the color tensors at order α′2 of the color-dressed tree amplitude. Minimize

Publisher:

Springer Berlin Heidelberg

Year of Publication:

2014-08-01

Source:

Journal of High Energy Physics, 2014-08-01, Volume 2014, pp 1-62

Journal of High Energy Physics, 2014-08-01, Volume 2014, pp 1-62 Minimize

Language:

En

Subjects:

Scattering Amplitudes ; Superstrings and Heterotic Strings

Scattering Amplitudes ; Superstrings and Heterotic Strings Minimize

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Title:

Multiparticle SYM equations of motion and pure spinor BRST blocks

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In this paper a multiparticle generalization of linearized ten-dimensional super Yang-Mills superfields is proposed. Their equations of motions are shown to take the same form as in the single-particle case, supplemented by contact terms. A recursive construction of these superfields is inspired by the iterated OPEs among massless vertex operato...

In this paper a multiparticle generalization of linearized ten-dimensional super Yang-Mills superfields is proposed. Their equations of motions are shown to take the same form as in the single-particle case, supplemented by contact terms. A recursive construction of these superfields is inspired by the iterated OPEs among massless vertex operators in the pure spinor formalism. An enlarged set of BRST-covariant pure spinor blocks is then defined in a streamlined fashion and combined to multiparticle vertex operators. The latter can be used to universally describe tree-level subdiagrams in the perturbative open and closed superstring, regardless of the loop order. The inherent symmetries of the multiparticle superfields are reproduced by structure constants of the gauge group, hinting a natural appearance of the BCJ-duality between color and kinematics in the fundamentals of super Yang-Mills theory. We present one-loop applications where known scalar cohomology objects are systematically recomputed and a novel vector cohomology particularly relevant to the closed string is constructed for arbitrary multiplicity. Minimize

Publisher:

Springer Berlin Heidelberg

Year of Publication:

2014-07-01

Source:

Journal of High Energy Physics, 2014-07-01, Volume 2014, pp 1-40

Journal of High Energy Physics, 2014-07-01, Volume 2014, pp 1-40 Minimize

Language:

En

Subjects:

Superstrings and Heterotic Strings ; BRST Symmetry

Superstrings and Heterotic Strings ; BRST Symmetry Minimize

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Title:

für Physik (Werner-Heisenberg-Institut), München under supervision of Dr. Stephan

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Description:

und familiengleiche

und familiengleiche Minimize

Contributors:

The Pennsylvania State University CiteSeerX Archives

Year of Publication:

2012-06-21

Source:

http://edoc.ub.uni-muenchen.de/13381/1/Schlotterer_Oliver.pdf

http://edoc.ub.uni-muenchen.de/13381/1/Schlotterer_Oliver.pdf Minimize

Document Type:

text

Language:

en

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Metadata may be used without restrictions as long as the oai identifier remains attached to it.

Metadata may be used without restrictions as long as the oai identifier remains attached to it. Minimize

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and

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Bulk induced boundary perturbations for N = 1 superconformal field theories

Bulk induced boundary perturbations for N = 1 superconformal field theories Minimize

Contributors:

The Pennsylvania State University CiteSeerX Archives

Year of Publication:

2012-11-20

Source:

http://arxiv.org/pdf/0810.4719v1.pdf

http://arxiv.org/pdf/0810.4719v1.pdf Minimize

Document Type:

text

Language:

en

Rights:

Metadata may be used without restrictions as long as the oai identifier remains attached to it.

Metadata may be used without restrictions as long as the oai identifier remains attached to it. Minimize

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Lecture notes on Infinite Dimensional Symmetries given by Hermann Nicolai at the

Lecture notes on Infinite Dimensional Symmetries given by Hermann Nicolai at the Minimize

Contributors:

The Pennsylvania State University CiteSeerX Archives

Year of Publication:

2010-03-06

Source:

http://www.itp.uni-hannover.de/~lechtenf/Events/Lectures/nicolai.pdf

http://www.itp.uni-hannover.de/~lechtenf/Events/Lectures/nicolai.pdf Minimize

Document Type:

text

Language:

en

Rights:

Metadata may be used without restrictions as long as the oai identifier remains attached to it.

Metadata may be used without restrictions as long as the oai identifier remains attached to it. Minimize

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Title:

The structure of n-point one-loop open superstring amplitudes

Author:

Description:

In this article we investigate one-loop amplitudes in maximally supersymmetric superstring theory. The non-anomalous part of the worldsheet integrand is presented for any number of massless open-string states. The polarization dependence is organized into the same BRST-invariant kinematic combinations which also govern the leading string correct...

In this article we investigate one-loop amplitudes in maximally supersymmetric superstring theory. The non-anomalous part of the worldsheet integrand is presented for any number of massless open-string states. The polarization dependence is organized into the same BRST-invariant kinematic combinations which also govern the leading string correction to tree-level amplitudes. The dimensions of the bases for both the kinematics and the associated worldsheet integrals is found to be the unsigned Stirling number S 3 n − 1 $$ {S}_3^{n-1} $$ of first kind. We explain why the same combinatorial structures govern on the one hand finite one-loop amplitudes of equal helicity states in pure Yang-Mills theory and on the other hand the color tensors at order α ′ 2 of the color-dressed tree amplitude. Minimize

Year of Publication:

2014-10-17T13:24:08Z

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Title:

Multiparticle SYM equations of motion and pure spinor BRST blocks

Author:

Description:

In this paper a multiparticle generalization of linearized ten-dimensional super Yang-Mills superfields is proposed. Their equations of motions are shown to take the same form as in the single-particle case, supplemented by contact terms. A recursive construction of these superfields is inspired by the iterated OPEs among massless vertex operato...

In this paper a multiparticle generalization of linearized ten-dimensional super Yang-Mills superfields is proposed. Their equations of motions are shown to take the same form as in the single-particle case, supplemented by contact terms. A recursive construction of these superfields is inspired by the iterated OPEs among massless vertex operators in the pure spinor formalism. An enlarged set of BRST-covariant pure spinor blocks is then defined in a streamlined fashion and combined to multiparticle vertex operators. The latter can be used to universally describe tree-level subdiagrams in the perturbative open and closed superstring, regardless of the loop order. The inherent symmetries of the multiparticle superfields are reproduced by structure constants of the gauge group, hinting a natural appearance of the BCJ-duality between color and kinematics in the fundamentals of super Yang-Mills theory. We present one-loop applications where known scalar cohomology objects are systematically recomputed and a novel vector cohomology particularly relevant to the closed string is constructed for arbitrary multiplicity. Minimize

Year of Publication:

2014-10-17T13:43:57Z

DDC:

539 Modern physics *(computed)*

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Title:

Higher Spin Scattering in Superstring Theory

Description:

We compute scattering amplitudes of leading Regge trajectory states in open superstring theories. Highest spin states at mass level n with spin s=n+1 for bosons and s=n+1/2 for fermions are generated by particularly simple vertex operators. Hence, the cubic couplings of bosons and fermions on the leading Regge trajectory are given for arbitrary ...

We compute scattering amplitudes of leading Regge trajectory states in open superstring theories. Highest spin states at mass level n with spin s=n+1 for bosons and s=n+1/2 for fermions are generated by particularly simple vertex operators. Hence, the cubic couplings of bosons and fermions on the leading Regge trajectory are given for arbitrary n. The same can be achieved for higher point amplitudes, and this article focuses on four point level with one heavy maximum spin state and three massless states in any bose-fermi combination, putting particular emphasis on manifest cyclic symmetry. Except for the four fermion coupling, all our results remain valid in any D<10 dimensional compactification scenario, so they might become relevant at LHC in case of an experimentally accessible low string scale. But even if not directly observable, superstring amplitudes provide important clues on higher spin dynamics and their consistent interactions in field theory. ; Comment: 31 pages; v3: final version published in Nuclear Physics B Minimize

Year of Publication:

2010-11-04

Document Type:

text

Subjects:

High Energy Physics - Theory

High Energy Physics - Theory Minimize

DDC:

539 Modern physics *(computed)*

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Title:

Higher Loop Spin Field Correlators in D=4 Superstring Theory

Description:

We develop calculational tools to determine higher loop superstring correlators involving massless fermionic and spin fields in four space time dimensions. These correlation functions are basic ingredients for the calculation of loop amplitudes involving both bosons and fermions in D=4 heterotic and superstring theories. To obtain the full ampli...

We develop calculational tools to determine higher loop superstring correlators involving massless fermionic and spin fields in four space time dimensions. These correlation functions are basic ingredients for the calculation of loop amplitudes involving both bosons and fermions in D=4 heterotic and superstring theories. To obtain the full amplitudes in Lorentz covariant form the loop correlators of fermionic and spin fields have to be expressed in terms of SO(1,3) tensors. This is one of the main achievements in this work. ; Comment: 59 pages, 1 figure; v2: final version published in JHEP Minimize

Year of Publication:

2010-01-19

Document Type:

text

Subjects:

High Energy Physics - Theory

High Energy Physics - Theory Minimize

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Title:

Scattering amplitudes in open superstring theory

Publisher:

Ludwig-Maximilians-Universität München

Year of Publication:

2011-07-15

Document Type:

Dissertation ; NonPeerReviewed

Subjects:

Fakultät für Physik

Fakultät für Physik Minimize

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