49 citations · 239 across the 19 of their papers we have counts for
18 papers · 1 filter
The Full Lepton Flavor of the Littlest Higgs Model with T-parity
F. del Aguila, Ll. Ametller, J. I. Illana +3
We re-examine lepton flavor violation (LFV) in the Littlest Higgs model with T--parity (LHT) including the full T--odd (non-singlet) lepton and Goldstone sectors. The heavy leptons…
Lepton Flavor Changing Higgs decays in the Littlest Higgs Model with T-parity
F. del Aguila, Ll. Ametller, J. I. Illana +3
We calculate loop induced lepton flavor violating Higgs decays in the Littlest Higgs model with T-parity. We find that a finite amplitude is obtained only when all contributions fr…
Insights into states from an effective perspective
Ll. Ametller, P. Talavera
We discuss the two photon coupling of the lightest scalar meson on the basis of an extension of PT. Using low energy data on the pion form-factor and the …
The lowest resonance in QCD from low--energy data
L. Ametller, P. Talavera
We show that a generalization of Chiral Perturbation Theory, including a perturbative singlet scalar field, converges faster towards the physical value of sensible low--ene…
QCD corrections to forward-backward charge asymmetries in l- l+ j production at hadron colliders
R. Pittau, F. del Aguila, Ll. Ametller
The large cross sections for gauge boson production at the Fermilab Tevatron and the CERN Large Hadron Collider (LHC) might give a chance to determine the electroweak parameters wi…
NLO forward-backward charge asymmetries in p p (p bar p) -> l- l+ jet production at large hadron colliders
F. del Aguila, Ll. Ametller, R. Pittau
We consider the next-to-leading order corrections, O(alpha_s), to forward-backward charge asymmetries for lepton-pair production in association with a large transverse momentum jet…
Forward-backward asymmetries of lepton pairs in events with a large transverse momentum jet at hadron colliders
F. del Aguila, Ll. Ametller, P. Talavera
We discuss forward-backward charge asymmetries for lepton pair production in association with a large transverse momentum jet at hadron colliders. The measurement of the lepton cha…
Eta decays involving photons
Lluis Ametller
The decays of the eta meson are reviewed in the framework of Chiral Perturbation Theory. Particular attention is devoted to the electromagnetic channels involving photons, either i…
Electromagnetic corrections to gamma pi(+) -> pi(0) pi(+)
Ll. Ametller, M. Knecht, P. Talavera
The amplitude for the anomalous transitions gamma pi(+) -> pi(0) pi(+) is analyzed within Chiral Perturbation Theory including electromagnetic interactions. The presence of a t-cha…
Zt and γt production via top flavour-changing neutral couplings at the Fermilab Tevatron
F. del Aguila, J. A. Aguilar-Saavedra, Ll. Ametller
Associated single top production with a Z boson or a photon at large hadron colliders provides a precise determination of top flavour-changing neutral couplings. The best way to me…
Low-energy photon-photon fusion into three pions in Generalized Chiral Perturbation Theory
Ll. Ametller, J. Kambor, M. Knecht +1
The processes and are considered in Generalized Chiral Perturbation theory, in view of their potential sensitivity to the mechanism of spontane…
Chiral-loop and vector-meson contributions to eta -> pi pi gamma gamma decays
Ll. Ametller, J. Bijnens, A. Bramon +1
The process eta -> pi0 pi0 gamma gamma is discussed in Chiral Perturbation Theory (ChPT) extending two recent analyses. Special attention is devoted to one-loop corrections, eta-et…
Neural network analysis for gamma gamma -> 3pi at Daphne
Ll. Ametller, Ll. Garrido, P. Talavera
We consider the possibility of using neural networks in experimental data analysis in Daphne. We analyze the process and its backgrounds using neural networks a…
Discriminating signal from background using neural networks. Application to top-quark search at the Fermilab Tevatron
Ll. Ametller, Ll. Garrido, G. Stimpfl-Abele +2
The application of Neural Networks in High Energy Physics to the separation of signal from background events is studied. A variety of problems usually encountered in this sort of a…
to One Loop in Chiral Perturbation Theory
P. Talavera, Ll. Ametller, J. Bijnens +2
The and amplitudes are discussed in the general context of Chiral Perturbation Theory (ChPT) to . Chiral loops are found to play a m…
Enhancing the top signal at Tevatron using Neural Nets
Ll. Ametller, Ll. Garrido, P. Talavera
We show that Neural Nets can be useful for top analysis at Tevatron. The main features of and background events on a mixed sample are projected in a single output, which…
The and Decays Revisited
Ll. Ametller, A. Bramon, E. Massó
The rare and decays are calculated in different schemes, which are seen to be essentially equivalent to and produce the same results as conventional…
Semileptonic and Decays and the Chiral Anomaly at One-loop
Ll. Ametller, J. Bijnens, A. Bramon +1
We calculate the corrections to the anomalous form factors appearing in , and decays in Chiral Perturbation Theory. The relevant dim…