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Author: Publisher: ISBN: Category : Languages : en Pages : 17
Book Description
The MARK II detector has started to take data at the new SLAC Linear Collider. The novel aspects of the accelerator and of the MARK II are briefly described. Displays of event pictures from some of the early-on data are presented to illustrate the quality of the data. A first presentation of the results of an energy scan near the Z° mass that is currently in progress shows the expected resonant enhancement near 91 GeV. 2 refs., 23 figs., 1 tab.
Author: Publisher: ISBN: Category : Languages : en Pages : 17
Book Description
The MARK II detector has started to take data at the new SLAC Linear Collider. The novel aspects of the accelerator and of the MARK II are briefly described. Displays of event pictures from some of the early-on data are presented to illustrate the quality of the data. A first presentation of the results of an energy scan near the Z° mass that is currently in progress shows the expected resonant enhancement near 91 GeV. 2 refs., 23 figs., 1 tab.
Author: Publisher: ISBN: Category : Languages : en Pages :
Book Description
At SLAC we are currently involved in the exciting challenge of commissioning the first example of a new type of colliding beam accelerator, the SLAC Linear Collider, or SLC. The goals of the SLC are two-fold. It will explore the concept of linear colliders, and it will allow the study of physics on the Z° resonance. It accomplishes these goals by exploiting the existing SLAC linac and the large visible cross-section of approximately thirty nanobarns of the Z°. The MARK II detector will have the opportunity to be first to explore the physics in this regime. This paper briefly reports the status of the SLC and of the MARK II as of early October 1987, at which time commissioning efforts were interrupted in order to place the MARK II detector at the collision point and to incorporate some improvements to the SLC. The first portion of this report highlights some of the milestones achieved in the SLC commissioning and some of the problems encountered. The last portion outlines improvements made to the MARK II for physics at the SLC. 10 refs., 12 figs., 1 tab.
Author: Publisher: ISBN: Category : Languages : en Pages : 10
Book Description
This paper reviews results on Z° physics from the 1989 run of the Mark 2 experiment at the SLAC Linear Collider. Based on about 20 nb−1 we present results on the mass, width and branching ratios of the Z° boson, the number of light neutrino species, properties of hadronic decays and searches for new particles. 16 refs., 9 figs.
Author: Publisher: ISBN: Category : Languages : en Pages : 22
Book Description
My lectures at Cargese covered the very first physics results from the SLAC Linear Collider (SLC). At the time of this writing (December 1989), it seems most sensible to present a review of the results that were presented at the school in an updated form. The organization of this report will be to give a brief introduction to linear colliders and the SLC, then to describe the MARK II detector, and finally to review the current status of the three major physics topics discussed at Cargese: the Z line shape, from which we deduce the Z mass and width, and the number of neutrino species, the partonic structure of hadronic decays and a measurement of [alpha]{sub s}, and searches for new quarks and leptons. 39 refs., 27 figs., 3 tabs.
Author: Publisher: ISBN: Category : Languages : en Pages :
Book Description
A short review of the physics goals and the status of the SLC is followed by a discussion of the energy spectrometer with center-of-mass energy resolution on a pulse-to-pulse basis of +-50 MeV/c2. The status of the SLC polarization experiment is discussed. The expected physics program of the Mark II is given.
Author: Publisher: ISBN: Category : Languages : en Pages : 53
Book Description
The SLAC Linear Collider (SLC) was constructed in the years 1983--1987 for two principal reasons: to develop the accelerator physics and technology that are necessary for the construction of future linear electron-positron colliders; and to produce electron-positron collisions at the Z° pole and to study the physics of the weak neutral current. To date, the SLC program has been quite successful at achieving the first goal. The machine has produced and collided high energy electron and positron beams of three-micron transverse size. The problems of operating an open geometry detector in an environment that is more akin to those found in fixed-target experiments than in storage rings have largely been solved. As a physics producing venture, the SLC has been less successful than was originally hoped but more successful than is commonly believed. Some of the results that have been produced by the Mark II experiment with a very modest data sample are competitive with those that have been produced with much larger samples by the four LEP collaborations. At the current, time, SLAC is engaged in an ambitious program to upgrade the SLC luminosity and to exploit one of its unique features, a spin polarized electron beam. These lectures are therefore organized into three sections: a brief description of the SLC; a review of the physics results that have been achieved with the Mark II detector; a description of the SLC's future: the realization and use of a polarized electron beam.
Author: Publisher: ISBN: Category : Languages : en Pages : 12
Book Description
The Stanford Linear Collider (SLC) located at the Stanford Linear Accelerator Center (SLAC) collides electrons and positrons produced in the linear accelerator pulse by pulse. The object is to produce collisions energetic enough to produce the heavy intermediate vector boson, the Z°. An essential component of the SLC physics program is the precise knowledge of the center-of-mass energy of each interaction. We measure the energy of each collision by using two energy spectrometers. The spectrometers are located in extraction lines of each beam. We will measure the energy of each beam to 20 MeV or 5 parts in 104. We report here on the status of the energy spectrometer system. 13 refs., 7 figs., 3 tabs.
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