One Loop Calculations in Gauge Theories Regulated on an x+x^+-p+p^+ Lattice

In earlier work, the planar diagrams of $SU(N_c)$ gauge theory have been regulated on the light-cone by a scheme involving both discrete $p^+$ and $\tau=ix^+$. The transverse coordinates remain continuous, but even so all diagrams are rendered finite by this procedure. In this scheme quartic interactions are represented as two cubics mediated by short lived fictitious particles whose detailed behavior could be adjusted to retain properties of the continuum theory, at least at one loop. Here we use this setup to calculate the one loop three gauge boson triangle diagram, and so complete the calculation of diagrams renormalizing the coupling to one loop. In particular, we find that the cubic vertex is correctly renormalized once the couplings to the fictitious particles are chosen to keep the gauge bosons massless.Comment: 26 pages, 36 figure

The 1985-1986 South Pole balloon campaign

This paper will provide an overview of the University of Houston-University Park/University of Maryland-College Park balloon program that was carried out at Amundsen-Scott Station, South Pole, Antarctica, during the 1985-1986 austral summer. The paper will emphasize objectives, instrumentation and operations. The quality of the data and periods of special interest will be discussed while final conclusions will be left necessarily to a later time. The primary experimental tools used in this program were unmanned stratospheric balloon payloads. The balloons used were helium-filled and had a volume of 5100m^3. The payloads had a mass of 24.5kg, giving a nominal float altitude of 32km. The payloads were instrumented with three-axis, doubleprobe field detectors and X-ray scintillation counters. Secondary instrumentation onboard measured the stratospheric conductivity, the ambient temperature and pressure. Three of the payloads also included tone-ranging transceivers. Equally essential to the program are the ground-based data from the South Pole Station Cusp Lab, the newly developed conjugate observatory, the Goose Bay HF radar, the Sφndrestrφm radar, and satellite data from the DE spacecraft. In the month starting on 16 December 1985 and ending 16 January 1986,8 successful balloon flights were conducted, ranging in duration from 6 to 103h 30min. A total of 468h 30min of data were obtained under a wide range of magnetic conditions. Periods of particular interest include 19 December 1985,28 December 1985,30 December 1985,2-3 January 1986,and 7-8 January 1986