Edmond L Berger

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We discuss the study of the top quark at future experiments and machines. Top's large mass makes it a unique probe of physics at the natural electroweak scale. We emphasize measurements of the top quark's mass, width, and couplings, as well as searches for rare or nonstandard decays, and discuss the complementary roles played by hadron and lepton colliders.
We present an outlook for possible discovery of supersymmetry with broken R-parity at Run II of the Tevatron. We first present a review of the literature and an update of the experimental bounds. In turn we then discuss the following processes: 1. Resonant slepton production followed by Rp decay, (a) via LQD c and (b) via LLE c. 2. How to distinguish(More)
Events with three or more isolated leptons in the final state are known to be signatures of new physics phenomena at high energy collider physics facilities. Standard model sources of isolated trilepton final states include gauge boson pair production such as W Z and W γ * , and t ¯ t production. We demonstrate that leptons from heavy flavor decays, such as(More)
We discuss calculations of the inclusive total cross section for heavy quark production at hadron collider energies within the context of perturbative quantum chromodynamics, including resummation of the effects of initial-state soft gluon radiation to all orders in the strong coupling strength. We resum the universal leading-logarithm contributions, and we(More)
Our calculation of the total cross section for inclusive production of t ¯ t pairs in hadron collisions is presented. The principal ingredient of the calculation is resummation of the universal leading-logarithm effects of gluon radiation to all orders in the quantum chromodynamics coupling strength, restricted to the region of phase space that is(More)
We present a calculation of the total cross section for top quark production based on a new perturbative resummation of gluon radiative corrections to the basic QCD subprocesses. We use Principal Value Resummation to calculate all relevant large threshold corrections. Advantages of this method include its independence from arbitrary infrared cutoos and(More)
The production rate and kinematic distributions of isolated photon pairs produced in hadron interactions are studied. The effects of the initial–state multiple soft–gluon emission to the scattering subprocesses q ¯ q, qg, and gg → γγX are resummed with the Collins–Soper–Sterman soft gluon resummation formalism. The effects of fragmentation photons from qg →(More)
A calculation of the total cross section for top quark production in hadron-hadron collisions is presented based on an all-orders perturbative resummation of initial-state gluon radiative contributions to the basic quantum chromodynamics subprocesses. Principal-value resummation is used to evaluate all relevant large threshold contributions. In this method(More)
A large forward-backward asymmetry is seen in both the top quark rapidity distribution A(FB)(t) and in the rapidity distribution of charged leptons A(FB)(ℓ) from top quarks produced at the Tevatron. We study the kinematic and dynamic aspects of the relationship of the two observables arising from the spin correlation between the charged lepton and the top(More)
Introduction: The strongest evidence from Comet Wild 2 for preservation of grains that experienced aqueous alteration at some point in their history may be low-temperature sulfide minerals similar to those in the CI chondrites such as cubanite, pentlandite, and pyrrhotite [1, 2]. Unraveling the mechanisms and conditions of sulfide formation – through(More)