Small Angle Physics at CDF: A Progress Report Page: 2 of 17
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CDF/MIN..BIAS/PUB/CDFR/1075
December 16, 1989
Small Angle Physics at CDF: A Progress Report
The CDF Collaboration1
Presented by Riccardo PA OLE TTI
Istituto Nazionale di Fisica Nucleare - Sezione di Pisa
56010 S. Piero a Grado, Italy
at the 8il Workshop on Proton-Antiproton Collider Physics
Castiglione della Pescaia (GR), Italy, 1-5 September 1989
Abstract
In 1989 CDF collected data in special high beta runs with a trigger selecting
elastic and inelastic events in order to measure the total cross section (croe)
and the differential elastic cross section (doa./dt). Data were taken at cms
energies of 300, 540, 1000 and 1800 GeV. A double arm magnetic spectrometer
located along the beam pipe tags the particles scattered at very small angles and
tracking detectors surrounding the interaction point reveal particles produced
at larger angles. We discuss the status of the analysis of elastic and inelastic
events with emphasis on the event selection and the background subtraction.
1 The Physics Program
The main goal of the experiment is to measure the total cross section. By using
the optical theorem, the total cross section is given by
(1 + p2)crtot = 16ra(c)2 (d /
R1 + Rj,
where p is the ratio of the real to the imaginary part of the forward scattering
amplitude and Rd and Rj,~. are the elastic and inelastic (including both diffractive
and non diffractive processes) rates. Elastic and inelastic events are produced in
different angular regions that are covered with two experimental setups, respectively
called the elastic and the inelastic detectors.
1ANL-Brandeis-University of Chicago-Fermilab-INFN,Frascati-Harvard-University of Illinois-
KEK-LBL- University of Pennsylvania-INFN,University and Scuola Normale Superiore of Pisa-
Purdue-Rockefeller-Rutgers-Texas A&M-Tsukuba-University of Wisconsin
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Paoletti, Riccardo. Small Angle Physics at CDF: A Progress Report, article, December 16, 1989; Batavia, Illinois. (https://digital.library.unt.edu/ark:/67531/metadc1054429/m1/2/: accessed April 23, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.