Parton energy loss in the quark–gluon plasma (QGP) is studied with a measurement of photon-tagged jet production 1.7 nb−1 Pb+Pb data and 260 pb−1 pp data, both at sNN=5.02 TeV, ATLAS detector. The process →γ+jet+X its analogue collisions measured events containing an isolated photon transverse momentum (pT) above 50 GeV reported as function pT. This selection results sample jets steeply falling...

Aims. We study the uniformity of the distribution of compact flat-spectrum AGN on the sky and the evolution of their relativistic jets with cosmic epoch. Methods. A complete sample of compact extragalactic radio sources at 15 GHz was recently compiled to conduct the MOJAVE program. The MOJAVE sample comprises 133 radio-loud flat-spectrum AGN with compact relativistic outflows detected at parsec...

The structure of AGN accretion disks on sub-parsec scales can be probed through free-free absorption of synchrotron emission from the base of symmetric radio jets. For objects in which both jet and counterjet are detectable with VLBI, the accretion disk will cover part of the counterjet and produce diminished brightness whose angular size and depth as a function of frequency can reveal the radi...

The paper considers heat transfer characteristics of thin film flow over a hot horizontal flat plate resulting from a cold vertical jet of liquid falling onto the surface. A numerical solution of high accuracy is obtained for large Reynolds numbers using the modified Keller box method. For the flat plate, solutions for axisymmetric jets are obtained. In a parallel approximation theory, an advan...

A new model of blue jets as a lightning-related phenomenon is proposed. A blue jet consists of the bi-leader, whose top part is seen on photos as a ‘‘trunk of a tree’’, and is capped at the topside of the leader by its streamer zone. The latter is shown as tall and narrow branches of ‘‘the tree’’. It is shown that the time independent fractal blue jet model does not provide an adequate descript...

We present results of a global tuning of general purpose Monte Carlo models to published measurements of p ! jets at HERA and ! jets at LEP and TRISTAN. The principle free parameters in the tuning are the simulation of the underlying event and the choice of photon structure. Several combinations of models are ruled out by the data.