The two ∇6^{6} R4^{4} type invariants and their higher order generalisation

Mar 13, 2015
54 pages
Published in:
  • JHEP 07 (2015) 154
  • Published: Jul 29, 2015
e-Print:

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Abstract: (Springer)
We show that there are two distinct classes of ∇6^{6} R4^{4} type supersymmetry invariants in maximal supergravity. The second class includes a coupling in F2^{2}4^{4} R4^{4} that generalises to 1/8 BPS protected F^{2}^{k} ∇4^{4} R4^{4} couplings. We work out the supersymmetry constraints on the corresponding threshold functions, and argue that the functions in the second class satisfy to homogeneous differential equations for arbitrary k ≥ 1, such that the corresponding exact threshold functions in type II string theory should be proportional to Eisenstein series, which we identify. This analysis explains in particular that the exact ∇6^{6} R4^{4} threshold function is the sum of an Eisenstein function and a solution to an inhomogeneous Poisson equation in string theory.
Note:
  • 53 pages
  • Extended Supersymmetry
  • Nonperturbative Effects
  • Supergravity Models
  • Supersymmetric Effective Theories
  • supersymmetry: constraint
  • string model: Type II
  • differential equations
  • Poisson equation
  • supergravity
  • higher-order