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- F Larios, M A Pérez, C.-P Yuan
- 1999

We update the constraints on anomalous dimension four t-b-W and t-t-Z couplings by using CLEO b → sγ and LEP/SLC precision Z-pole data. It is found that the data imposes very stringent bounds on them. Moreover, the 2σ pull from SM predictions of A LR (hadrons), A b and A F B (b) have little chance of being explained by the strongly constrained anomalous… (More)

- F Larios, R Martinez, M A Perez
- 2006

We survey the flavor-changing neutral couplings (FCNC) of the top quark predicted by some extensions of the Standard Model: THDM, SUSY, L-R symmetric, TC2, 331, and models with extra quarks. Since the expected sensitivity of the LHC and ILC for the tcV (V = γ, g, Z) and tcH couplings is of order of a few percent, we emphasize the importance of any new… (More)

- F Larios, R Martínez, M A Pérez
- 2008

We study the one-loop contributions of the effective flavor changing neutral couplings (FCNC) tcZ and tcH on the electroweak precision observables Γ Z , R c , R b , R ℓ , A c and A F B c. Using the known experimental limits on these observables, we may place 95% CL bounds on these FCNC couplings which in turn translate into the following limits for the… (More)

- F Larios, M A Pérez, G Tavares-Velasco
- 2002

It is shown that the rare decays Z → ν ¯ νγ and Z → ν ¯ νγγ are useful to put model-independent bounds on neutrino-one-photon and neutrino-two-photon interactions. The results are then used to constrain the τ neutrino magnetic moment µ ντ and the double radiative decay ν j → ν i γγ. It is found that the decay Z → ν ¯ νγ gives a more stringent bound on µ ντ… (More)

- G Bravo, F Larios, R Rojas-Martínez, E Hong, L A Salazar, G Guízar-Sahagún
- Neuroscience letters
- 1999

Previously, we have shown that immediately after an experimental spinal cord injury (SCI) in anaesthetized rats, there is a large fall in mean arterial pressure (MAP) and heart rate (HR), followed by an abrupt increase in MAP. To evaluate the participation of nitric oxide (NO), we evaluated the activity of nitric oxide synthase (NOS) using Nicotinamide… (More)

- F Larios, E Malkawi, P Yuan
- 1996

A study on the effective anomalous interactions, up to dimension 5, of the top quark with the electroweak gauge bosons is made in the non-linear Chi-ral Lagrangian approach. Bounds on the anomalous dimension four terms are obtained from their contribution to low energy data. Also, the potential contribution to the production of top quarks at hadron… (More)

The aim of this study was to determine if like buspirone, ipsapirone and 8-hydroxy-2(di-N-propylamino)tetralin (8-OH-DPAT), the alpha 1-adrenoceptors are involved in the responses elicited by indorenate in rabbit aorta. Exception made of ipsapirone, all the 5-HT1A agonists above mentioned contracted aortic rings. The contraction elicited by buspirone and… (More)

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