Zobrazeno 1 - 10
of 120
pro vyhledávání: '"OLIVEIRA, S. M. P."'
Publikováno v:
Phys. Rev. A 100, 052110 (2019)
To explain aspects of the quantum-to-classical transition, quantum Darwinism explores the fact that, due to interactions between a quantum open system and its surrounding environment, information about the system can be spread redundantly to the envi
Externí odkaz:
http://arxiv.org/abs/1911.07958
Parapatric speciation is studied using an individual--based model with sexual reproduction. We combine the theory of mutation accumulation for biological ageing with an environmental selection pressure that varies according to the individuals geograp
Externí odkaz:
http://arxiv.org/abs/q-bio/0508017
Autor:
Oliveira, S. M., Santos, R.
Publikováno v:
Acta Phys.Polon.B34:5523-5530,2003
In this work we present limits on a sequential down-type quark, b', based on the most recent DELPHI data. Using all available experimental data for m_b' > 96 GeV we conclude that a sequential four generations model is far from being experimentally ex
Externí odkaz:
http://arxiv.org/abs/hep-ph/0311047
Publikováno v:
Phys.Rev.D69:034012,2004
The non-radiative scattering amplitudes for electron-positron annihilation into quark and lepton pairs in the TeV energy range are calculated in the double-logarithmic approximation. The expressions for the amplitudes are obtained using infrared evol
Externí odkaz:
http://arxiv.org/abs/hep-ph/0309230
Autor:
Oliveira, S. M., Santos, R.
Publikováno v:
Phys.Rev.D68:093012,2003
Recent results from the DELPHI collaboration led us to review the present bounds on the b' quark mass. We use all available experimental data for m_b' > 96 GeV to constrain the b' quark mass as a function of the Cabibbo-Kobayashi-Maskawa elements in
Externí odkaz:
http://arxiv.org/abs/hep-ph/0307318
The impact of the electroweak radiative corrections on the value of the forward-backward asymmetry in e^+ e^- annihilation into a quark-antiquark pair is considered in the double-logarithmic approximation at energies much higher than the masses of th
Externí odkaz:
http://arxiv.org/abs/hep-ph/0307238
Accounting for double-logarithmic contributions to high-energy (>> 100 GeV) e^+ e^- annihilation into a quark or a lepton pair in the kinematics where the final particles are colinear to the e^+e^- beams leading to a sizable difference between the fo
Externí odkaz:
http://arxiv.org/abs/hep-ph/0211415
Publikováno v:
Phys.Rev. D66 (2002) 114018
Production of electroweak bosons in e+e- annihilation into quarks and into leptons at energies much greater than 100 Gev is considered. We account for double-logarithmic contributions to all orders in electroweak couplings. It is assumed that the bos
Externí odkaz:
http://arxiv.org/abs/hep-ph/0207159
We take a closer look at the mass terms of all renormalizable and CP conserving two-Higgs doublet models (THDM). We show how some of the dimension two parameters in the potential can be set equal to zero leading to relations among the tree-level para
Externí odkaz:
http://arxiv.org/abs/hep-ph/0112202
Publikováno v:
Phys.Rev. D64 (2001) 017301
We have calculated the one-loop electroweak corrections to the decay t-> bW+, including the counterterm for the CKM matrix elements V(tb). Previous calculations used an incorrect delta V(tb) that led to a gauge dependent amplitude. However, since the
Externí odkaz:
http://arxiv.org/abs/hep-ph/0011324