Changes between Version 7 and Version 8 of ALPsEFT

Timestamp:

Sep 20, 2017, 4:51:15 PM (7 years ago)

Author:

Ilaria Brivio

Comment:

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ALPsEFT

@@ -23 +23 @@
 
 
-Two 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. In the first scenario, the ALP is coupled to a "linear" EFT (also called SMEFT), in which the Higgs belongs to a SU(2) doublet and the interaction terms are organized in an expansion in mass dimension.
+Two 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. In the first scenario, the ALP is coupled to a "linear" EFT (also called SMEFT), in which the Higgs boson belongs to an exact SU(2) doublet and the interaction terms are organized in an expansion in mass dimension.
 In the latter scenario, instead, two independent fields are introduced for the EW Goldstone bosons and for the physical Higgs, and one constructs a "chiral" EFT (sometimes also called non-linear or HEFT), in which the effective operators are ordered according to a more complex counting that, for the Goldstone bosons sector, reduces to a derivative one.