9,201 research outputs found

    Probing the ZZgamma and Zgammagamma Couplings Through the Process e+e- --> nu anti-nu gamma

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    We study the sensitivity for testing the anomalous triple gauge couplings ZZγZZ\gamma and ZγγZ\gamma\gamma via the process e+eννˉγe^+e^-\to \nu \bar\nu \gamma at high energy linear colliders. For integrated luminosities of 500 fb1fb^{-1} and center of mass energies between 0.5 and 1.5 TeVTeV, we find that this process can provide tests of the triple neutral gauge boson couplings of order 10410^{-4}, one order of magnitude lower than the standard model prediction.Comment: 12 pages, 6 figure

    Pairs-Production of Higgs in Association with Bottom Quarks Pairs at e+ee^+e^- Colliders

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    In a previous paper, we studied the Higgs pair production in the standard model with the reaction e+ettˉHHe^{+}e^{-}\to t \bar t HH. Based on this, we study the Higgs pair production via e+ebbˉHHe^{+}e^{-}\to b \bar b HH. We evaluate the total cross section of bbˉHHb\bar bHH and calculate the number total of events considering the complete set of Feynman diagrams at tree-level, and compare this process with the process e+ettˉHHe^{+}e^{-}\to t \bar t HH. The numerical computation is done for the energy which is expected to be available at a possible Next Linear e+ee^{+}e^{-} Collider with a center-of-mass energy 800,1000,1600800, 1000, 1600 GeVGeV and luminosity 1000 fb1fb^{-1}.Comment: 12 pages, 6 figure

    Shift Selection Influence in Partial Cycle Spinning Denoising of Biomedical Signals

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    Denoising of biomedical signals using wavelet transform is a widely used technique. The use of undecimated wavelet transform (UWT) assures better denoising results but implies a higher complexity than discrete wavelet transform (DWT). Some implementation schemes have been proposed to perform UWT, one of them is Cycle Spinning (CS). CS is performed using the DWT of several circular shifted versions of the signal to analyse. The reduction of the number of shifted versions of the biomedical signal during denoising process used is addressed in the present work. This paper is about a variant of CS with a reduced number of shifts, called Partial Cycle Spinning (PCS), applied to ultrasonic trace denoising. The influence of the choice of PCS shifts in the denoised registers quality is studied. Several shifts selection rules are proposed, compared and evaluated. Denoising results over a set of ultrasonic registers are provided for PCS with different shift selection rules, CS and DWT. The work shows that PCS with the appropriate choice of shifts could be the best option to denoise biomedical ultrasonic traces. (C) 2015 Elsevier Ltd. All rights reserved.This work was partially supported by Spanish Government MEC Project TIN2013-47272-C2-1-R.Rodríguez-Hernández, MA. (2016). Shift Selection Influence in Partial Cycle Spinning Denoising of Biomedical Signals. Biomedical Signal Processing and Control. 26:64-68. https://doi.org/10.1016/j.bspc.2015.12.002S64682
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