The hadroproduction of lepton pairs with mass Q and finite transverse momentum QT is described in perturbative QCD by the same partonic subprocesses as prompt photon production. We demonstrate that, like prompt photon production, lepton pair production is dominated by quark-gluon scattering in the region QT > Q/2. This feature leads to sensitivity to the gluon density in kinematical regimes acc...

We use the POMWIG Monte Carlo generator to predict the cross-sections for double diffractive higgs and di-photon production at the Tevatron and LHC. We find that the higgs production cross-section is too small to be observable at Tevatron energies, and even at the LHC observation would be difficult. Double diffractive di-photon production, however, should be observable within one year of Tevatr...

Two-photon polymerization is an appealing technique for producing microscale devices due to its flexibility in producing structures with a wide range of geometries as well as its compatibility with materials suitable for biomedical applications. The greatest limiting factor in widespread use of two-photon polymerization is the slow fabrication times associated with line-by-line, high-resolution...

The interaction between phytochrome photoequilibrium (phi) and photon flux in the photoregulation of anthocyanin production under prolonged irradiation was studied in seedlings of Brassica oleracea L. and Lycopersicon esculentum Mill. In cabbage, anthocyanin production increases with decreasing phi, reaching a maximum at the lowest value (phi = 0.13) used in this study; in tomato, the extent of...

I clarify the mistakes in hep-ph/9705427 (Remarks on the kinematics of the one-photon production in electron-proton scattering) about the phase space factor for the one-photon production in electronproton scattering and confirm that the earlier result given by Kroll, Schürmann and Guichon is right.

High intensity back-scattered laser beams will allow the efficient conversion of a substantial fraction of the incident lepton energy into high energy photons, thus significantly extending the physics capabilities of an ee linear collider. The annihilation of two photons produces C = + final states in virtually all angular momentum states. An important physics measurement is the measurement of ...

Tagging two-photon production offers a significant extension of the LHC physics programme. Effective luminosity of high-energy γγ collisions reaches 1% of the protonproton luminosity and the standard detector techniques used for measuring very forward proton scattering should allow for a reliable extraction of interesting twophoton interactions. Particularly exciting is a possibility of detecti...

We analyze in detail photon production induced by a superluminal refractive-index perturbation in realistic experimental operating conditions. The interaction between the refractive-index perturbation and the quantum vacuum fluctuations of the electromagnetic field leads to the production of photon pairs.

Massive lepton-pair production, the Drell-Yan process, should be a good source of independent constraints on the gluon density, free from the experimental and theoretical complications of photon isolation that beset studies of prompt photon production. We provide predictions for the spin-averaged and spin-dependent differential cross sections as a function of transverse momentum Q T .

The DD and CDF experiments at the Fermilab Tevatron have recently measured photon production cross sections in pp collisions at p s = 1:8 TeV. An improved measurement of the isolated single photon production cross section with an increased data sample is presented and compared to NLO QCD predictions. Also, a new measurement of the production of + events is discussed and compared with NLO QCD pr...