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- W161728156 abstract "In this thesis we investigated, at partonic level and leading order, the LHC potencial operating with $sqrt{s}=14$ TeV and integrated luminosity of $L=100;{fb}^{-1}$ to probe pure (without triple vertex contributions) anomalous electroweak quartic couplings, $WWWW$ and $WWZZ$, in the semileptonic $pp rightarrow l^{pm}nu_{l}jjjj$ channel, enhanced by the Vector Boson Fusion collider signatures. Deviations on SM quartic couplings were parameterized in a model independent approach, realized linearly ($L_{S0}$ and $L_{S1}$ operators) or not ($L_{4}$ and $L_{5}$ operators), on the basis of effective lagrangians. Being our analysis essentially events counting-and-cut based, we took into account all possible backgrounds (irreducible, QCD and top quarks processes) considered at ${cal O}(alpha_{em}^{6})$, ${cal O(alpha_{em}^{4}alpha_{s}^{2})$ and ${cal O}(alpha_{em}^{2}alpha_{s}^{4})$. In this way, we have obtained the following constraints for the non-linear $alpha_{4}$ and $alpha_{5}$ anomalous couplings: $|alpha_{4,5}| lesssim 0.01$ to 0.02 at 3$sigma$. Based on non-linear results, we have estimated, for a specific choice of factorization and renormalization scale, the linear parameters $f_{0}$ and $f_{1}$ constraints as $-22 leq dfrac{f_{0}}{Lambda^{4}};({TeV}^{-4}) leq 20, quad {and} quad -26 leq dfrac{f_{1}}{Lambda^{4}};({TeV}^{-4}) leq 24$ at 3$sigma$. On a different approach, manipulating one extension of the SM named $331_{RHN}$, we have evaluated the contribution of new sources of FCNC for the difference of mass of neutral meson systems, $K_{0}-bar{K_{0}}$, $D^{0}-bar{D^0}$ and $B^0_d-bar{B^0_d}$. Bounds related to these systems may be significantly strengthened in the presence of these new interactions allowing stronger constraints on the parameter space of the model." @default.
- W161728156 created "2016-06-24" @default.
- W161728156 creator A5002304451 @default.
- W161728156 date "2013-03-03" @default.
- W161728156 modified "2023-09-27" @default.
- W161728156 title "Searches for New Physics in the Standard Model's Electroweak Sector: Quartic Anomalous Couplings with Vector Boson Fusion and Flavor Changed Neutral Current in the $SU(3)_{C}otimes SU(3)_{L}otimes U(1)_{X}$ model" @default.
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