Changes between Version 3 and Version 4 of ALPsEFT


Ignore:
Timestamp:
09/20/17 16:38:42 (2 years ago)
Author:
IlariaBrivio
Comment:

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  • ALPsEFT

    v3 v4  
    55
    66I. Brivio^a,b)^, M.B. Gavela^a)^, L. Merlo^a)^, K. Mimasu^c,d)^, J.M. No^c,e)^, R. del Rey^a)^, V. Sanz^c)^
    7 
    8 {{{
    9 ilaria.brivio@nbi.ku.dk
    10 }}}
    117
    128''
     
    2117== The model description ==
    2218
     19The Standard Model (SM) is extended with the inclusion of a generic CP-odd scalar field, that is a singlet under the SM gauge symmetries.
     20This new field is assumed to be an Axion-Like-Particle, i.e. the (pseudo) Nambu-Goldstone boson of an unspecified spontaneously broken U(1) symmetry, associated with a heavy scale f,,,a,,,.
     21As 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,,.
     22In these models the benchmark values f,,a,,= 1 TeV, m,,a,, = 1 MeV are assumed.
     23
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     25Two major frameworks for the electroweak sector are considered: a linear realization of electroweak symmetry breaking (EWSB), typical of weakly coupled new physics, and a non-linear one, such as those in constructions involving new strongly interacting physics.
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     33The Feynrules models supplied contain only the definition of the ALP particle and of its interactions, and should therefore be loaded alongside the SM Lagrangian.
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     36Please report bugs or questions to:  ilaria.brivio@nbi.ku.dk
    2337
    2438== References ==
     
    2842
    2943
    30 ---
     44----
    3145
    3246== Files ==
     
    3953'''Mathematica notebook'''
    4054
    41 * [attachment:"ALPsEFT.nb"] Demo notebook
     55* [attachment:"ALPs_EFT.nb"] Demo notebook
    4256
    4357'''Pre-exported UFO models'''