Open superstring first mass level effective Lagrangian: Massive spin-2 in an electromagnetic background

Benakli, Karim; Daniel, Cassiano A.; Ke, Wenqi

doi:10.1016/j.physletb.2023.137680

Cited by 6 publications

(8 citation statements)

References 11 publications

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“…In [18] an effective superspace action for the first mass level of a charged superstring, incorporating a massive spin-3/2 and a massive spin-2 particle within the same supermultiplet, was obtained. This action was subsequently expanded and simplified into its component form [15][16][17], which retains only physical degrees of freedom. The resulting Lagrangian includes a charged massive spin-3/2, described by the two-component spinor fields , , coupled to the two-component spinors , of a spin 1/2 Dirac fermion ,…”

Section: Deriving Spin-3/2 Equations Of Motion From a Lagrangianmentioning

confidence: 99%

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Dilatonic (Anti-)de Sitter Black Holes and Weak Gravity Conjecture

Benakli

Branchina

Lafforgue-Marmet

2022

Proceedings of Corfu Summer Institute 2021 "School and Workshops on Elementary Particle Physics and Gravity" — PoS(CORFU2021)

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We summarize our results on the presence and location of horizons in charged black hole solutions of Einstein-Maxwell-dilaton theory with non-trivial dilaton potentials, asymptotically flat or (Anti-)de Sitter, as function of the black hole parameters mass, charge and dilaton coupling strength. We observe that there is a value of latter which separates two regions, one where the black hole is Reissner-Nordström-like from a region where it is Schwarzschild-like. We find that for de Sitter and small non-vanishing of the dilaton coupling parameter, the extremal case is not reached by the solution. We also discuss the attractive or repulsive nature of the leading long distance interaction between two such black holes, or a test particle and one black hole, from a world-line effective field theory point of view.

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Section: Deriving Spin-3/2 Equations Of Motion From a Lagrangianmentioning

confidence: 99%

“…Despite many efforts, the problem of constructing a Lagrangian that only contains fields of higher spins remains unresolved to this day. However, progress was made for the original problem posed by Dirac, Fierz and Pauli of simply writing down the equations of motion [15][16][17][18] which we will be concerned with here.…”

Section: Introductionmentioning

confidence: 99%

Dilatonic (Anti-)de Sitter Black Holes and Weak Gravity Conjecture

Benakli

Branchina

Lafforgue-Marmet

2022

Proceedings of Corfu Summer Institute 2021 "School and Workshops on Elementary Particle Physics and Gravity" — PoS(CORFU2021)

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“…Moreover, we take the usual string theory convention α = 1/2. An arbitrary mass parameter has been explicitly restored in the letters [27,28] that contain some of our main results.…”

Section: Introductionmentioning

confidence: 99%

Spin-3/2 and spin-2 charged massive states in a constant electromagnetic background

Benakli¹,

Daniel²,

Ke³

2023

Preprint

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We develop in components the superspace action obtained in [1] describing the first massive level of the open charged superstring in a flat four-dimensional spacetime. In the absence of an electromagnetic background, we show how the Rarita-Schwinger and Fierz-Pauli Lagrangians are retrieved for spin-3/2 and 2, respectively. We then write different forms of the action in the presence of the electromagnetic background. The resulting equations of motion describe the propagation of fields of charged spin-3/2 and spin-1/2 on the one hand, and spin-2, 1 and 0 on the other.

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“…Despite these developments, the problem of high spin particles remains unsolved to this day, when it comes to finding a Lagrangian with only the fields of higher spins. Here, we shall report on a substantial progress: a solution the original problem of finding the equations of motion [1][2][3][4].…”

Section: Introductionmentioning

confidence: 99%

“…We briefly comment on use of amplitude computation to investigate different forms of the Weak Gravity Conjectures. This talk is based on [1][2][3][4][5]…”

mentioning

confidence: 99%

Learning from superstring massive states

Benakli

2023

Proceedings of Corfu Summer Institute 2022 "School and Workshops on Elementary Particle Physics and Gravity" — PoS(CORFU2022)

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We discuss the first massive level of the open charged superstring in a flat four-dimensional spacetime. We show how the Rarita-Schwinger and Fierz-Pauli Lagrangians are retrieved for spin-3/2 and 2, respectively. In the absence of an electromagnetic background, We derive explicit equations of motion that describe the propagation of fields of charged spin-3/2 in flat space-time, which has been a long-standing problem. We briefly comment on use of amplitude computation to investigate different forms of the Weak Gravity Conjectures. This talk is based on [1][2][3][4][5]

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Open superstring first mass level effective Lagrangian: Massive spin-2 in an electromagnetic background

Cited by 6 publications

References 11 publications

Dilatonic (Anti-)de Sitter Black Holes and Weak Gravity Conjecture

Dilatonic (Anti-)de Sitter Black Holes and Weak Gravity Conjecture

Spin-3/2 and spin-2 charged massive states in a constant electromagnetic background

Learning from superstring massive states

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