نتایج جستجو برای: jets
تعداد نتایج: 14822 فیلتر نتایج به سال:
Measurement of the top quark mass in the t ¯ t → lepton+jets and t ¯ t → dilepton channels using √ s = 7 TeV ATLAS data Abstract The top quark mass was measured in the channels t ¯ t → lepton+jets and t ¯ t → dilepton (lepton = e, μ) based on ATLAS data recorded in 2011. The data were taken at the LHC with a proton–proton centre-of-mass energy of √ s = 7 TeV and correspond to an integrated lumi...
Photoproduction events which have two or more jets have been studied in the Wγp range 135 GeV < Wγp < 280 GeV with the ZEUS detector at HERA. A class of events is observed with little hadronic activity between the jets. The jets are separated by pseudorapidity intervals (∆η) of up to four units and have transverse energies greater than 6 GeV. A gap is defined as the absence between the jets of ...
In this paper a summary of present CDF and DO / results on supersymmetry and Higgs searches at Tevatron is presented. Analysis include results from a variety of signatures: missing E T and jets (or leptons and jets) for squark/gluino searches, trileptons and missing E T for gaugino searches and, for the rst time, charmed-tagged jets and missing E T as a new signature for stop quark pair product...
The dynamical effects of magnetic fields in models of radiative, Herbig-Haro (HH) jets have been studied in a number of papers. For example, magnetized, radiative jets from variable sources have been studied with axisymmetric and 3D numerical simulations. In this paper, we present an analytic model describing the effect of a toroidal magnetic field on the internal working surfaces that result f...
Many analyses at the collider utilize the hadronic jets that are the footprints of QCD partons. These are used both to study the QCD processes themselves and increasingly as tools to study other physics, for example top mass reconstruction. However, jets are not fundamental degrees of freedom in the theory, so we need an operational jet definition and reliable methods to calculate their propert...
Ureteral jets are the result of a forceful ejection of urine from the vesicoureteral junction into the urinary bladder. By using color Doppler ultrasonography (US), we aimed to identify distinct ureteral jets in dogs, provide insight into ureteral obstruction, and facilitate study of urodynamics and vesicoureteric sphincter function via pulsed Doppler US. Color Doppler US was applied to detect ...
Argo float data in the tropical Pacific Ocean during January 2003–August 2011 are analyzed to obtain Lagrangian subsurface velocities at their parking depths. Maps of mean zonal velocities at 1000 and 1500 m are presented. At both depths, a series of alternating westward and eastward zonal jets with ameridional scale of 1.58 is seen at the basin scale from 108S to 108N. These alternating jets, ...
When two jets of fluid collide, they can "bounce" off each other, due to a thin film of air which keeps them separated. We describe the phenomenon of stable noncoalescence between two jets of the same fluid, colliding obliquely with each other. Using a simple experimental setup, we carry out a parametric study of the bouncing jets by varying the jet diameter, velocity, angle of inclination, and...
Since the discovery of the top quark by the CDF and DØ Collaborations 1, Tevatron remains the world’s only experimental facility where it’s properties can be investigated. In pp̄ collisions top quarks are dominantly produced in pairs via strong interaction. Depending on the decay modes of the W -bosons, one expects three distinctive event topologies from the tt̄ → WbWb̄ signal: a di-lepton final s...
Synchrotron emission at radio wavelengths is commonly found in relativistic jets from active galactic nuclei (AGNs) and microquasars and allows the study of the magnetic field in these kind of jets. In contrast, the radio emission from jets from young stellar objecs (YSOs) is usually of very different nature: thermal free-free emission, which does not provide direct information about their magn...
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