Study Of Pp And Lambda Lambda Production E E Annihilation At 10 Gev Center Of Mass Energy

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ISBN 13 :
Total Pages : 162 pages
Book Rating : 4.:/5 (873 download)

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Download or read book Neutral Kaon and Lambda Production in Electron-positron Annihilation at 29 GeV and the Z Boson Resonance written by and published by . This book was released on 1990 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt: The production of K° and [Lambda] in the hadronization of q{bar q} events from ee− collisions at 29 GeV and the Z° resonance is studied using the Mark II detector as upgraded for running at the Stanford Linear Collider. Hadronization processes cannot presently be calculated with Quantum Chromodynamics; instead, hadronization models must be used in comparisons with data. In these models, hadronization occurs at local energy scales of a few GeV, a level at which small differences in quark and diquark mass significantly affect the production of particles such as K° and [Lambda], the lightest neutral meson and baryon containing strange quarks. Their production and behavior in hadronic events is a test for the accuracy of our understanding of hadronization. Two-charged- particle decays of the K° and [Lambda] are isolated within the hadronic event sample. The resulting distribution of K° and [Lambda] are corrected for inefficiencies and generalized to include all K° and [Lambda]. Various kinematic distributions of the strange particles are examined. These distributions include the momentum and scaled momentum of the particles. The kinematics of the particles with respect to the original quark direction are examined through the distributions of rapidity and momentum transverse to the thrust both in and out of the event plane. The dependence of K° and [Lambda] production on the sphericity of the hadronic events is also examined. All these distributions show that the behavior of K° and [Lambda] in hadronic events is consistent with the hadronization models.