arXiv subjects

Matthew Wing

Publications and source records attributed to Matthew Wing.

23 records · Page 2Linked to original sources

arXiv2005

Heavy quark production at HERA and the LHC

Measurements of heavy quark production, particularly from HERA, their theoretical understanding and their relevance for the LHC are reviewed. The status of beauty and charm production is discussed in the context of the different components of the production process: the parton density function of the colliding hadrons; the hard scatter; and the fragmentation of the quarks into hadrons. The theory of QCD at next-to-leading order generally describes well the hadronic structure and the production of heavy quarks although sometimes fails in details which are highlighted. The fragmentation of heavy quarks measured at HERA is consistent with that at LEP and hence supports the notion of universality.

hep-ex↗

arXiv2003

Heavy flavour production with leptons and hadrons

The production of charm and beauty quarks in $γγ$ collisions at LEP, $ep$ collisions at HERA and $p \bar{p}$ collisions at the Tevatron is discussed. The comparison with predictions of next-to-leading-order QCD and the issues it raises are detailed. In particular, the strengths and weaknesses of the measurements and predictions are discussed.

hep-ex↗

arXiv2000

Prescise measurement of jet energies with the ZEUS detector

A method to correct the jet transverse energy has been developed for the ZEUS detector which attains an uncertainty better than 3%. The procedure is based on a combination of tracking and calorimeter information that optimises the resolution of reconstructed kinematic variables. The selected calorimeter clusters and tracks are referred to as Energy Flow Objects (EFOs). The conservation of energy and momentum in neutral current deep inelastic $e^+p$ scattering events is exploited to determine the required energy corrections by balancing the scattered positron with the hadronic final state. The method has been applied to data and simulated events independently. The corrected EFOs are used as input to a $k_T$-cluster jet algorithm to reconstruct the jets and to determine kinematic variables. In addition, the corrected EFOs allow an improved measurement of the internal structure of a jet.

hep-ex↗

arXiv2000

Introduction to high$-p_T$ inclusives

A selection of theoretical and experimental results are presented in the broader context of understanding QCD and its relation to photon physics. A phenomenological analysis of HERA data to constrain the gluon content of the proton and photon is discussed. Measurements from the Tevatron and fixed-target experiments are compared to theoretical predictions. Finally, the future of higher order pQCD calculations is addressed.

hep-ex↗

arXiv1998

Photon Structure and the Hadronic Final State in Photoproduction Processes at ZEUS

Advances in knowledge of the structure of the photon and tests of perturbative QCD have been made using the increased luminosity with the ZEUS detector at HERA. Events with a low photon virtuality and two high transverse energy jets have been studied. Measurements of inclusive dijet and multijet production are herein compared to Next-to-Leading-Order calculations. In order to analyse the structure of the photon, dijet production of quasi-real and virtual photons and dijet production containing $D^{*\pm}$ mesons were measured.

hep-ex↗