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

Author(s)

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

• Document type: Journal article
• Source: Physics Letters B; v. 838, p. 7-pg., 2023-01-17.

Abstract

Minimal coupling leads to problems such as loss of causality if one wants to describe charged particles of spin greater than one propagating in a constant electromagnetic background. Regge trajectories in string theory contain such states, so their study may allow us to investigate possible avenues to remedy the pathologies. We present here two explicit forms, related by field redefinitions, of the Lagrangian describing the bosonic states in the first massive level of open superstrings in four dimensions. The first one reduces, when the electromagnetic field is set to zero, to the Fierz-Pauli Lagrangian for the spin-2 mode. The second one is a more compact form which simplifies the derivation of a Fierz-Pauli system of equations of motion and constraints.(c) 2023 Published by Elsevier B.V. This is an open access article under the CC BY license (http:// creativecommons .org /licenses /by /4 .0/). Funded by SCOAP3. (AU)

• FAPESP's process: 22/14599-0 - Scattering Amplitudes in AdS5 × S5
• Grantee: Cassiano Antonio Daniel
• Support Opportunities: Scholarships in Brazil - Doctorate (Direct)
• FAPESP's process: 20/10183-9 - Scattering amplitudes in AdS5 × S5
• Grantee: Cassiano Antonio Daniel
• Support Opportunities: Scholarships in Brazil - Doctorate (Direct)