-1.0cm -0.8cm -0.8cm

**Solving the $A^b_{FB}$ anomaly in natural composite models**

[Leandro Da Rold]{}

*Centro Atómico Bariloche, 8400 San Carlos de Bariloche, Argentina*

**Abstract**

Introduction {#intro}
============

The main objective of the Large Hadron Collider (LHC) is to discover the real mechanism of electroweak symmetry breaking (EWSB). One of the most interesting solutions for the hierarchy problem is the breaking of the electroweak (EW) symmetry by a strongly interacting sector. Some examples of this approach are Technicolor theories [@technicolor] and theories with a composite Higgs boson [@old-composite-Higgs], both scenarios sharing an important difficulty at the theoretical level, the lack of a systematic method to perform precise calculations in strongly coupled theories. Theories with warped extra dimensions have open up new possibilities in this framework, allowing to make perturbative calculations in theories that resemble four dimensional strongly interacting theories [@Randall:1999ee; @ArkaniHamed:2000ds].

The main challenge of theories with extra dimensions is to pass the EW precision tests without the generation of a small hierarchy problem, this issue was already present in the original four dimensional proposals [@technicolor; @old-composite-Higgs]. The EW precision observables have confirmed that the Standard Model (SM) with a light Higgs boson gives an extremely precise description of particle physics 