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Measurement of associated production of vector bosons and top quark-antiquark pairs in pp collisions at √s=7 TeV
(2013-04-25)
The first measurement of vector-boson production associated with a top quark-antiquark pair in proton-proton collisions at √s=7 TeV is presented. The results are based on a data set corresponding to an integrated luminosity ...
Dynamical evolution of Saturn's F ring dust particles
(Wiley-Blackwell Publishing, Inc, 2009-06-01)
Saturn's F ring has been the subject of study due to its peculiar structure and the proximity to two satellites, named Prometheus (interior) and Pandora (exterior to the ring), which cause perturbations to the ring particles. ...
Controlling the Eccentricity of Polar Lunar Orbits with Low-Thrust Propulsion
(Hindawi Publishing Corporation, 2009-01-01)
It is well known that lunar satellites in polar orbits suffer a high increase on the eccentricity due to the gravitational perturbation of the Earth. That effect is a natural consequence of the Lidov-Kozai resonance. The ...
Torsion action and its possible observables
(1999-03-22)
The methods of effective field theory are used to explore the theoretical and phenomenological aspects of the torsion field. The spinor action coupled to the electromagnetic field and torsion possesses an additional softly ...
Low-energy muon-transfer reaction from hydrogen isotopes to helium isotopes
(Elsevier B.V., 2002-08-05)
Direct muon transfer in low-energy collisions of the muonic hydrogen H-mu and helium (He++) is considered in a three-body quantum-mechanical framework of coordinate-space integro-differential Faddeev-Hahn-type equations ...
Competition between suppression and production of Fermi acceleration
(Amer Physical Soc, 2010-03-01)
The behavior of the average velocity for a classical particle in the one-dimensional Fermi accelerator model under sawtooth external force is considered. For elastic collisions, it is known that the average velocity of the ...
Parameter space for a dissipative Fermi-Ulam model
(Iop Publishing Ltd, 2011-12-08)
The parameter space for a dissipative bouncing ball model under the effect of inelastic collisions is studied. The system is described using a two-dimensional nonlinear area-contracting map. The introduction of dissipation ...
Anomalous diffusion of pions at RHIC
(Sociedade Brasileira de Física, 2007-09-01)
After pointing out the difference between normal and anomalous diffusion, we consider a hadron resonance cascade (HRC) model simulation for particle emission at RHIC and point out that rescattering in an expanding hadron ...
Decay of energy and suppression of Fermi acceleration in a dissipative driven stadium-like billiard
(American Institute of Physics (AIP), 2012-06-01)
The behavior of the average energy for an ensemble of non-interacting particles is studied using scaling arguments in a dissipative time-dependent stadium-like billiard. The dynamics of the system is described by a four ...
Bounds on Higgs and gauge-boson interactions from LEP2 data
(1998-08-27)
We derive bounds on Higgs and gauge-boson anomalous interactions using the LEP2 data on the production of three photons and photon pairs in association with hadrons. In the framework of SU(2)L ⊗ U(1)Y effective Lagrangians, ...