Changes between Version 5 and Version 6 of ALPsEFT
 Timestamp:
 09/20/17 16:49:23 (2 years ago)
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ALPsEFT
v5 v6 18 18 19 19 The Standard Model (SM) is extended with the inclusion of a generic CPodd scalar field, that is a singlet under the SM gauge symmetries. 20 This new field is assumed to be an AxionLikeParticle, i.e. the (pseudo) NambuGoldstone boson of a n unspecifiedspontaneously broken U(1) symmetry, associated with a heavy scale f,,,a,,,.20 This new field is assumed to be an AxionLikeParticle, i.e. the (pseudo) NambuGoldstone boson of a spontaneously broken U(1) symmetry, associated with a heavy scale f,,,a,,,. 21 21 As such, the ALP field respects an approximate shift symmetry that requires its couplings to the SM to be purely derivative and weighted by inverse powers of f,,a,,. Moreover, its mass must be much lighter than f,,a,,. 22 22 These models assume the benchmark values f,,a,,= 1 TeV, m,,a,, = 1 MeV.