The emission of ee pairs from C+C collisions at an incident energy of 1 GeV per nucleon has been investigated. The measured production probabilities, spanning from the π-Dalitz to the ρ/ω invariant-mass region, display a strong excess above the cocktail of standard hadronic sources. The bombarding-energy dependence of this excess is found to scale like pion production, rather than like eta prod...

To mitigate the severity of rear-end and other collisions, Pre-Crash Systems (PCS) are being developed. These active safety systems utilize radar and/or video cameras to determine when a frontal crash, such as a front-to-back rear-end collisions, is imminent and can brake autonomously, even with no driver input. Of these PCS features, the effects of autonomous pre-crash braking are estimated. T...

We describe a laser-plasma platform for photon-photon collision experiments to measure fundamental quantum electrodynamic processes such as the linear Breit-Wheeler process with real photons. The has been developed using Gemini laser facility at Rutherford Appleton Laboratory. A wakefield accelerator and bremsstrahlung convertor are used generate collimated beam of photons energies hundreds MeV...

The polarization of photons produced in radiative Bs decays is studied for the first time. The data are recorded by the LHCb experiment in pp collisions corresponding to an integrated luminosity of 3 fb−1 at center-of-mass energies of 7 and 8 TeV. A time-dependent analysis of the Bs → φγ decay rate is conducted to determine the parameter AΔ, which is related to the ratio of rightover left-hande...

Studies of photon-photon collisions are reviewed with particular emphasis on new results reported to this conference. These include results on light meson spectroscopy and deep inelastic ey scattering. Considerable work has now been accumulated on resonance production by yy collisions. Preliminary high statistics studies of the photon structure function F$(x,Q2) are given and comments are made ...

Using the extrapolation of existing data estimations of prompt photon production at FAIR energies have been made. At y = yc.m. the rapidity density of prompt photons with pt > 1.5 GeV/c per central Au+Au event at 25 AGeV is estimated as ∼ 10 . With the planed beam intensity 10 per second and 1% interaction probability, for 10% of most central events one can expect the prompt photon rate ∼ 10 ph...

Heavy-flavoured hadrons are mainly produced at HERA in those events in which the virtuality of the photon exchanged between the electron and the proton is very small (see R. Thorne’s talk [1] for a review on heavy quark production in deep-inelastic scattering.) The electron, in this case, is equivalent to a beam of on-shell photons carrying a fraction of the electron energy distributed accordin...

We study single charged Higgs boson production in photon-photon collision as a probe of the new dynamics of Higgs interactions. This is particularly important when the mass (MH±) of charged Higgs bosons (H) is relatively heavy and above the kinematic limit of the pair production (MH± > √ s/2 ). We analyze the cross sections of single charged Higgs boson production from the photon-photon fusion ...

Submitted for the DPP16 Meeting of The American Physical Society Simulations On Pair Creation In Collision Of γ-Beams Produced With High Intensity Lasers1 OLIVER JANSEN, XAVIER RIBEYRE, EMMANUEL D’HUMIERES, MATHIEU LOBET, SOPHIE JEQUIER, VLADIMIR TIKHONCHUK, CELIA, Univ. Bordeaux / CNRS / CEA — Direct production of electron-positron pairs in two photon collisions, the Breit-Wheeler process, is ...

RESUMEN Favor de proporcionar un resumen en español. If you cannot provide a spanish abstract, the editors will do this. Massive WR+O star systems produce high-temperature, shock-heated plasma where the wind of the WR star and that of its binary companion collide-the wind-collision region (WCR). The WCR is a source of thermal (e.g. hard X-rays) and non-thermal (e.g. synchrotron) emission, the l...