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By Francesco Sannino

Strong dynamics constitutes one of many pillars of the normal version of particle interactions, and it bills for the majority of the obvious subject within the universe made by way of usual protons and neutrons. it really is accordingly a good posed query to invite if the remainder of the universe may be defined when it comes to new hugely usual 4-dimensional strongly coupled theories. the most objective of this lecture-based primer is to supply a coherent assessment of the way new robust dynamics could be hired to deal with the proper demanding situations in particle physics and cosmology from composite Higgs dynamics to darkish subject and inflation. we are going to first introduce the subject of dynamical breaking of the electroweak symmetry sometimes called technicolor. the data of the part diagram of strongly coupled theories performs a primary position whilst attempting to build practicable extensions of the traditional version. for this reason we current the state of the art of the section diagram for gauge theories as functionality of the variety of shades, flavors, topic illustration and gauge staff. contemporary extensions of the normal version that includes minimum technicolor theories are then brought as suitable examples. We eventually exhibit how technicolor or as a rule new strongly coupled theories can result in traditional applicants of composite darkish topic and inflation.

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X must assume a value strictly larger than one otherwise it is an abelian gauge theory. 36) which for N = 3 requires n f > 8. 3 Conformal Window from the Dual Magnetic Theory Asymptotic freedom of the newly found theory is dictated by the coefficient of the one-loop beta function: 50 2 Conformal Dynamics Interlude β0 = 11 2 (2n f − 5N ) − n f . 37) To this order in perturbation theory the gauge singlet states do not affect the magnetic quark sector and we can hence determine the number of flavors obtained by requiring the dual theory to be asymptotic free.

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