In view of possible photoproduction studies in ultraperipheral heavy-ion collisions at the LHC, we briefly review the present theoretical understanding of photons and hard photoproduction processes at HERA, discussing the production of jets, light and heavy hadrons, quarkonia, and prompt photons. We address in particular the extraction of the strong coupling constant from photon structure funct...

Recently several Higgsless models of electroweak symmetry breaking have been proposed in which unitarity of W,Z scattering amplitudes is partially restored through a tower of massive vector gauge bosons. These massive states are expected to couple mainly toW and Z and should appear as resonances in WW and WZ fusion at the CERN Large Hadron Collider (LHC). We study the LHC discovery reach for th...

The MIT Faculty has made this article openly available. Please share how this access benefits you. Your story matters. Search for photonic signatures of gauge-mediated supersymmetry in 8 TeV pp collisions with the ATLAS detector G. Aad et al. A search is presented for photonic signatures motivated by generalized models of gauge-mediated supersymmetry breaking. This search makes use of 20.3 fb −...

A search is presented for photonic signatures motivated by generalized models of gauge-mediated supersymmetry breaking. This search makes use of 20.3 fb−1 of proton-proton collision data at ffiffi s p 1⁄4 8 TeV recorded by the ATLAS detector at the LHC, and explores models dominated by both strong and electroweak production of supersymmetric partner states. Four experimental signatures incorpor...

We consider in the soft-collinear effective theory semi-inclusive hadronic B decays, B → XM , in which an energetic light meson M near the endpoint recoils against an inclusive jet X. We focus on a subset of decays where the spectator quark from the B meson ends up in the jet. The branching ratios and direct CP asymmetries are computed to next-to-leading order accuracy in αs and to leading orde...

Shock breakout X-ray emission has been reported for the first time from a supernova connected with a gamma-ray burst, namely GRB060218/SN2006aj. The gamma-ray emission and the power-law decaying X-ray afterglow are ascribed to a highly relativistic jet, while the thermal soft X-rays are thought to be produced when the radiation-dominated shock breaks from the optically thick stellar wind. We st...

We explore experimentally whether axisymmetry breaking can be exploited for the open-loop control of a prototypical hydrodynamic oscillator, namely low-density inertial jet exhibiting global self-excited axisymmetric oscillations. find that when forced transversely or axially at low amplitude, always transitions first from period-1 limit cycle to $\mathbb {T}^2$ quasiperiodicity via Neimark–Sac...

We present the results of simulations of the development of the Kelvin-Helmholtz (KH) instability in a cooled, slab symmetric system. The parameters were chosen to approximate the physical conditions typically found in jets from young stellar objects (YSOs). The effect of different methods of maintaining the initial equilibrium were examined for varying density. In addition, the effect of adjus...