We examine, as model-independently as possible, the production of bileptons at hadron colliders. When a particular model is necessary or useful, we choose the 3-3-1 model. We consider a variety of processes:, where Y and φ are vector and scalar bileptons, respectively. Given the present low-energy constraints, we find that at the Tevatron, vector bileptons are unobservable, while light scalar bileptons (M φ < ∼ 300 GeV) are just barely observable. At the LHC, the reach is extended considerably: vector bileptons of mass M Y < ∼ 1 TeV are observable, as are scalar bileptons of mass M φ < ∼ 850 GeV.

We consider a geometrically motivated Skyrme model based on a general covariant kinetic term proposed originally by Born and Infeld. We introduce this new term by generalizing the Born-Infeld action to a non-abelian SU (2) gauge theory and by using the hidden gauge symmetry formalism. The static properties of the Skyrmion are then analyzed and compared with other Skyrme-like models.

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GCA of the thoracic aorta may be suspected in less than 25% of patients preoperatively. Clinical presentation may be acute or chronic with localized or diffused aortic involvement but always involved the ascending aorta. Surgery may be performed with excellent outcomes. Follow-up imaging is mandatory to assess aortic progression.

We perform a simulation of scalar leptoquark pair production at the Tevatron ( √ s = 1.8 TeV and L = 100 pb −1 ) with ISAJET. We also investigate the dominant sources of Standard Model background: Z * jj, ZZ, W Z production and heavy quark tt. We find that the Z * jj background is dominant. We also evaluate the signal-to-background ratio and find a discovery reach of 130 GeV (170 GeV) for a branching ratio of BR(LQ → eq) = 0.5 (BR = 1).