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Showing 1 to 10 of 10 for “"Elementary particles & high energy physics"”.
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Study and implementation of a high-level trigger for the STAR experiment
We have designed and implemented various components of the STAR Level 3 trigger, including a Sector Level 3, a Global Level 3 and a Sector Broker. In addition, we have implemented and studied a small prototype of the STAR tracking farm, using Intel dual Pentiums connected via an ethernet ring.
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A search for the lightest supersymmetric partner of the top quark at DO
… the DO detector at a pp¯ center-of-mass energy of 1.96 TeV at the Fermilab Tevatron collider. The scalar top quarks are assumed to decay into a b quark, a charged lepton and a scalar neutrino ( n&d5; ), and the search is performed in the electron plus muon final state. No significant …
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Kinematic fitting of detached vertices
… and covariance matrices of the charged particles. The &Lgr; → ppi- and xi- → pi -&Lgr; decays were then investigated to demonstrate that the kinematic fitting routine reconstructs the decaying particles and their detached vertices correctly.
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A study of photon-nucleus collisions at high transverse energy
… dependence of photon-nucleus collisions at high transverse energy. The measurements were made at FNAL by using a large acceptance calorimeter with 50-400 GeV photons incident on LH$\sb2,$ LD$\sb2,$ Be, C, Al, Cu, Sn and Pb targets. The cross section is parameterized as $\sigma\sb{\gamma A} = …
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Constraints on New Physics from Neutrino and Other Particle Experiments
… and future experiments to extract information on physics beyond the Standard Model. We use the Jacobi method to derive a set of simplified expressions for the probabilities of neutrino oscillations in matter. we show the possible constraints that can be placed on various models beyond the Standard …
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'Variational' optimization in quantum field theory
… constant that remains finite down to zero energy. This allows us to apply the Poggio-Quinn-Weinberg smearing method down to energies below 1 GeV, where we find good agreement between theory and experiment. The couplant freezes to a zero-energy value of $\alpha\sb{s}/\pi = 0.26,$ which is in …
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Measurement of the analyzing power in inclusive, high-x(F) charged pion production with a 200 GeV/c polarized proton beam
… and 0.2$GeV/c \le p\sb{T} \le 2.0GeV/c.$ The higher values of $x\sb{F}$ and $p\sb{T}$ in these kinematic ranges insure that the measured particle came from an interaction of the beam and target through a direct channel and that quark scattering through gluon exchange is the dominant …
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Radial-zoned thermal accretion disk model around black holes
High energy astrophysics is a relatively new discipline that has witnessed tremendous advancement in the past 25 years or so with the advent of space technology, which provides the field with an indispensable observational tool in the X-ray and $\gamma$-ray range previously unreachable by …