نتایج جستجو برای: two jets
تعداد نتایج: 2447634 فیلتر نتایج به سال:
Aims. We have investigated the development of the dust and gas coma of the comet C/2004 Q2 (Machholz) from December 2004 to January 2005 using observations obtained at the Lulin Observatory, Taiwan and the European Southern Observatory at La Silla, Chile. Methods. We determined the dust-activity parameter A fρ and the dust color and derived Haser production rates and scale lengths of C2 and NH2...
The production cross section of a W boson in association with two b jets is measured using a sample of proton–proton collisions at √ s = 8 TeV collected by the CMS experiment at the CERN LHC. The data sample corresponds to an integrated luminosity of 19.8 fb −1. The W bosons are reconstructed via their leptonic decays, W → ν, where = μ or e. The fiducial region studied contains exactly one lept...
Many new physics models predict resonances with masses in the TeV range which decay into a pair of top quarks. With its large cross section, tt̄ production at the Large Hadron Collider (LHC) offers an excellent opportunity to search for such particles. We present a detailed study of the discovery potential of the CERN Large Hadron Collider for Kaluza-Klein (KK) excitations of the gluon in bulk R...
I conduct an analytical study of the interaction of jets, or a collimated fast wind (CFW), with a previously blown asymptotic giant branch (AGB) slow wind. Such jets (or CFWs) are supposedly formed when a compact companion, a main sequence star or a white dwarf, accretes mass from the AGB star, forms an accretion disk, and blows two jets. This type of flow, which is thought to shape bipolar pla...
In this talk I consider the formation of a rapidity gap in hadron production between two jets. To appear in the Proceedings of the International Workshop on Deep Inelastic Scattering and Related Phenomena Roma, Italy, April 1996 Rapidity gaps in hadron production between two jets have been observed in photoproduction at HERA [1] and in p p̄ collisions at the Tevatron [2], where it was found that...
Four double-parton scattering processes are examined at the Fermilab Tevatron energy. With optimized kinematical cuts and realistic parton level simulation for both signals and backgrounds, we find large samples of four-jet and three-jet+one-photon events with signal to background ratio being 20%-30%, and much cleaner signals from two-jet+two-photon and two-jet+ee final states. The last channel...
Crayfish are nocturnal animals that mainly rely on their chemoreceptors to locate food. On a crayfish scale, chemical stimuli received from a distant source are dispersed by an ambient flow rather than molecular diffusion. When the flow is weak or absent, food searching can be facilitated by currents generated by the animal itself. Crayfish employ their anterior fan organs to produce a variety ...
the effect of grain size, tailwater depth and grain froude number on local scour caused by submerged horizontal jets issuing below a sluice gate was investigated. noncohesive sediments with two gradations downstream of a horizontal apron were used in the experiments. the experiments were carried out at different inflow froude numbers and a range of tailwater depth from low to high submergence. ...
Two preliminary measurements of beauty production in events with two jets at HERA are presented. The first exploits the new ZEUS microvertex detector to measure the b content of a sample of events with two jets and a muon. The second is a measurement by the H1 collaboration based on inclusive lifetime tagging. The results are in agreement with previous measurements and with QCD predictions. ¡ S...
─ Supersonic flows associated with missiles, aircraft, missile engine intake and rocket nozzles are often steady. The shape of the nozzle geometry is increasingly attractive in heating, ventilation and air conditioning applications. The objective of the present work is to simulate and understand Supersonic flows with twin free jet Flow at various Mach numbers. The purpose is to precisely unders...
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