Vector Boson Pair Production Research Articles

Hadronic production of electroweak vector boson pairs at large transverse momentum

Production of electroweak vector boson pairs accompanied by a large transverse momentum jet at hadron colliders is calculated to lowest order QCD with emphasis on the p T and invariant mass distribution of the gauge boson pair. Analytic expressions for the matrix elements of all possible processes, including decays of W- and Z-bosons into massless fermion final states, are presented. It is found that these processes represent an important source for gauge boson pair production at the LHC and SSC and also constitute a background to new physics signals at these colliders, such as Higgs tagging or pair production of a fourth charged lepton.

Probing the tri-boson coupling in high-energy vector-boson pair production

A method is presented for probing the effects of the tri-boson gauge coupling in order to test the standard model and to discover new physics. For vector-boson pair-production in electron-positron annihilation, appropriate helicity amplitudes are defined which confine the contributions of the t-channel fermion-exchange process (with known couplings) to a limited set with simple behaviour. The remaining amplitudes depend entirely on the s-channel vector-boson-exchange process with the associated tri-boson coupling. Angular correlation coefficients and asymmetry parameters in this helicity basis are more directly linked to the tri-boson couplings than in the conventional formalism.

Gauge vector boson pair production at $$\bar p$$ p collider energies

Within the standardSU(2)×U(1) model differential cross sections and angular distributions of all polarization states are studied for all channels of gauge vector boson pairs accessible in hadron hadron collisions,W+W−,Z0Z0,Zγ,ZW, γW. The zero in the unpolarized angular distribution ofq\(\bar q\)→Wγ reported theoretically by Mikaelian et al. [1] is confirmed. The origin of this zero is studied which was discovered by Brown, Mikaelian, Samuel, and Shadev. None of the other channels exhibits a zero in the unpolarized angular distribution, but strong minima at cosΘ=0 are predicted for\(q_i \bar q_j \to Z\gamma \) and\(q_i \bar q_j \to ZW^ + \). These are of different origin than the Mikaelian zero. Simple structure functions suggest that these minima are seen inp\(\bar p\) collisions.

Theoretical cross section of vector-boson pair production from photons

We record here a brief analytic account of the calculation of the electromagnetic production cross section of charged-vector-meson pairs. The differential cross section is given in closed form. The total cross section is expressed as a two-dimensional integral to be evaluated numerically.