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Category :
Languages : de
Pages :

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Author: H. Albrecht
Publisher:
ISBN:
Category :
Languages : en
Pages : 5

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Author: Brian Keith Heltsley
Publisher:
ISBN:
Category : Hadrons
Languages : en
Pages : 422

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Author: Toshinori Mori
Publisher:
ISBN:
Category :
Languages : en
Pages : 262

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Author: Scott Clearwater
Publisher:
ISBN:
Category : Cross sections (Nuclear physics)
Languages : en
Pages : 264

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Author: Albert Laighton Osterheld
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Category :
Languages : en
Pages : 264

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Category :
Languages : en
Pages :

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This thesis describes the most precise measurement to date of the ratio R, the hadronic cross section in lowest order electron-positron annihilation to the cross section for muon pair production in lowest order electron-positron annihilation. This experiment is of interest because R is a fundamental parameter that tests in a model independent way the basic assumptions of strong interaction theories. According to the assumptions of one of these theories the value of R is determined simply from the electric charges, spin, and color assignments of the produced quark-pairs. The experiment was carried out with the MAgnetic Calorimeter using collisions of 14.5 GeV electrons and positrons at the 2200m circumference PEP storage ring at SLAC. The MAC detector is one of the best-suited collider detectors for measuring R due to its nearly complete coverage of the full angular range. The data for this experiment were accumulated between February 1982 and April 1983 corresponding to a total event sample of about 40,000 hadronic events. About 5% of the data were taken with 14 GeV beams and the rest of the data were taken with 14.5 GeV beams. A description of particle interactions and experimental considerations is given.

Author: A.T. Steward
Publisher: Elsevier
ISBN: 0323149820
Category : Science
Languages : en
Pages : 455

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Positron Annihilation focuses on the process of positron annihilation in different environments. Partitioned into two parts with 42 chapters, the book contains the contributions of authors who have done research on the annihilation of positrons, which brought about valuable information on the properties of matter. The first part of the book deals with lengthy review articles, including a survey of the physics of positron annihilation; positron annihilation in metals and the theory involved in the process; and positron annihilation in alkali halides and ionic crystals. Positronium formation and interaction in gases, molecular substances, and ionic crystals are also given attention. Gaseous positronics and positron annihilation in condensed gases and liquids are also discussed. The second part of the book focuses on developments on positron annihilation and the direction of research on this field. The studies concentrate on positron annihilation in various crystals, metals, mercury, liquefied gases, helium, and metal oxides. Numerical representations and analyses are presented to support the processes involved. The book can best serve the interest of those who want to explore further the annihilation of positrons.

Author: Betty Puifun Kwan
Publisher:
ISBN:
Category : Hadrons
Languages : en
Pages : 274

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Author: Michael Steven Gold
Publisher:
ISBN:
Category :
Languages : en
Pages : 240

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