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In this document, we briefly introduce the effective field theories. We propose some novel ideas in this manuscript. We introduce a novel formalism of the effective field theories and we apply it to the effective field theories of large scale structures. The new formalism is based on functionals of the actions composing those theories. We discuss our findings in a Cosmological Gravitology framework. We present with a cosmological inference approach these results and we give a guideline of how we can disentangle the best candidate between those models with some latest understanding of model selection.
I describe some of the many connections between lattice QCD and effective field theories, focusing in particular on chiral effective theory, and, to a lesser extent, Symanzik effective theory. I first discuss the ways in which effective theories have
The invariance of physical observables under redefinitions of the quantum fields is a well-known and important property of quantum field theory. We study perturbative field redefinitions in effective theories, paying special attention to higher-order
Effective field theories have often been applied to systems with deeply inelastic reactions that produce particles with large momenta outside the domain of validity of the effective theory. The effects of the deeply inelastic reactions have been take
The loss of particles due to highly inelastic reactions has previously been taken into account in effective field theories for low-energy particles by adding local anti-Hermitian terms to the effective Hamiltonian. An additional modification is requi
Van der Waals interactions between two neutral but polarizable systems at a separation $R$ much larger than the typical size of the systems are at the core of a broad sweep of contemporary problems in settings ranging from atomic, molecular and conde