Photoproduction of prompt photons and neutral pions at high transverse momentum
Photoproduction of prompt photons and neutral pions at high transverse momentum
This thesis describes an experiment carried out at CERN SPS North Area (NA14) to study the photoproduction of prompt photons at high transverse momentum (1 ≤ P_t ≤ GeV/c). Theoretical aspects of the subject are presented and the principle experimental techniques used in the NA14 experiment to produce a high energy (< E> ) im 80 GeV) and high intensity (im106) tagged photon beam are discussed. This is then followed by a description of a lead-scintillator sandwich calorimeter (one of the three in the experiment) with which the Author has been involved with throughout its development and operation. The calorimeter data analysed in this thesis was collected during 1982/83 run periods. Emphasis has been put on the method of analysis since a comprehensive understanding of this is fundamental to a proper appreciation of the subject matter. Large-Pt πo's are also reconstructed and are used in fine tuning of the calorimeter. Final results indicate that the observed πo spectrum is well described by a parametrization describing the VMD component of the photon structure function. This parametrization is also used in a simulation program to evaluate the background to the observed spectrum of single photons. After subtracting the contributions from various sources of background, a clear excess of single photons is observed which is attributed to prompt photons.
University of Southampton
Baghal Shooshtari, Gholam Hossein
1984
Baghal Shooshtari, Gholam Hossein
Baghal Shooshtari, Gholam Hossein
(1984)
Photoproduction of prompt photons and neutral pions at high transverse momentum.
University of Southampton, Doctoral Thesis.
Record type:
Thesis
(Doctoral)
Abstract
This thesis describes an experiment carried out at CERN SPS North Area (NA14) to study the photoproduction of prompt photons at high transverse momentum (1 ≤ P_t ≤ GeV/c). Theoretical aspects of the subject are presented and the principle experimental techniques used in the NA14 experiment to produce a high energy (< E> ) im 80 GeV) and high intensity (im106) tagged photon beam are discussed. This is then followed by a description of a lead-scintillator sandwich calorimeter (one of the three in the experiment) with which the Author has been involved with throughout its development and operation. The calorimeter data analysed in this thesis was collected during 1982/83 run periods. Emphasis has been put on the method of analysis since a comprehensive understanding of this is fundamental to a proper appreciation of the subject matter. Large-Pt πo's are also reconstructed and are used in fine tuning of the calorimeter. Final results indicate that the observed πo spectrum is well described by a parametrization describing the VMD component of the photon structure function. This parametrization is also used in a simulation program to evaluate the background to the observed spectrum of single photons. After subtracting the contributions from various sources of background, a clear excess of single photons is observed which is attributed to prompt photons.
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Published date: 1984
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Local EPrints ID: 460665
URI: http://eprints.soton.ac.uk/id/eprint/460665
PURE UUID: cc37f9e1-adcf-485d-9d9c-0c8b428b0eff
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Date deposited: 04 Jul 2022 18:26
Last modified: 04 Jul 2022 18:26
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Author:
Gholam Hossein Baghal Shooshtari
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