17,730 research outputs found
Higgs self coupling measurement in e+e- collisions at center-of-mass energy of 500 GeV
Feasibility of the measurement of the trilinear self-couplings of the Higgs
boson is studied. Such a measurement would experimentally determine the
structure of the Higgs potential. Full hadronic and semi-leptonic final states
of the double-Higgs strahlung have been investigated.Comment: 10 pages, 5 tables, 8 figure
Flow properties of suspensions rich in solids
Mathematical evaluation of flow properties of fluids carrying high concentrations of solids in suspension relates suspension viscosity to physical properties of the solids and liquids, and provides a means for predicting flow behavior. A technique for calculating a suspensions flow rates is applicable to the design of pipelines
The AGL Equation from the Dipole Picture
The AGL equation includes all multiple pomeron exchanges in the double
logarithmic approximation (DLA) limit, leading to an unitarized gluon
distribution in the small x regime. This equation was originally obtained using
the Glauber-Mueller approach. We demonstrate in this paper that the AGL
equation and, consequently, the GLR equation, can also be obtained from the
dipole picture in the double logarithmic limit, using an evolution equation,
recently proposed, which includes all multiple pomeron exchanges in the leading
logarithmic approximation. Our conclusion is that the AGL equation is a good
candidate for an unitarized evolution equation at small x in the DLA limit.Comment: 16 pages, 2 figures. Accepted for publication in Nuc. Phys.
Understanding crack versus cavitation in pressure-sensitive adhesives: the role of kinetics
We perform traction experiments on viscous liquids highly confined between
parallel plates, a geometry known as the probe-tack test in the adhesion
community. Direct observation during the experiment coupled to force
measurement shows the existence of several mechanisms for releasing the stress.
Bubble nucleation and instantaneous growth had been observed in a previous
work. Upon increasing further the traction velocity or the viscosity, the
bubble growth is progressively delayed. At high velocities, cracks at the
interface between the plate and the liquid appear before the bubbles have grown
to their full size. Bubbles and cracks are thus observed concomitantly. At even
higher velocities, cracks develop fully so early that the bubbles are not even
visible. We present a theoretical model that describes these regimes, using a
Maxwell fluid as a model for the actual fluid, a highly viscous silicon oil. We
present the resulting phase diagramme for the different force peak regimes. The
predictions are compatible with the data. Our results show that in addition to
cavitation, interfacial cracks are encountered in a probe-tack traction test
with viscoelastic, \emph{liquid} materials and not solely with viscoelastic
solids like adhesives.Comment: 44 page
QCD Collisional Energy Loss in an Increasingly Interacting Quark Gluon Plasma
The discovery of the jet quenching in central Au + Au collisions at the
Relativistic Heavy-ion Collider (RHIC) at Brookhaven National Laboratory has
provided clear evidence for the formation of strongly interacting dense matter.
It has been predicted to occur due to the energy loss of high energy partons
that propagate through the quark gluon plasma. In this paper we investigate the
dependence of the parton energy loss due to elastic scatterings in a parton
plasma on the value of the strong coupling and its running with the evolution
of the system. We analyze different prescriptions for the QCD coupling and
calculate the energy and length dependence of the fractional energy loss.
Moreover, the partonic quenching factor for light and heavy quarks is
estimated. We found that the predicted enhancement of the heavy to light
hadrons () ratio is strongly dependent on the running of the QCD
coupling constant.Comment: 16 pages, 8 figures. Version to be published in the International
Journal of Modern Physics
On duality relations for session types
Session types are a type formalism used to describe communication protocols over private session channels. Each participant in a binary session owns one endpoint of a session channel. A key notion is that of duality: the endpoints of a session channel should have dual session types in order to guarantee communication safety. Duality relations have been independently defined in different ways and different works, without considering their effect on the type system. In this paper we systematically study the existing duality relations and some new ones, and compare them in order to understand their expressiveness. The outcome is that those relations are split into two groups, one related to the na¨ıve inductive duality, and the other related to a notion of mutual compliance, which we borrow from the literature on contracts for web-services
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