Endcap Calorimeter Proposal

This is an HTML version of the "Proposal to Construct an Endcap Electromagnetic Calorimeter for Spin Physics at STAR", reviewed at the 8-9 October 1998 meeting of the HENP program advisory committee at Brookhaven National Laboratory. Alternatively, you can get a gzipped postscript file of the entire proposal or the appendix.

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Next Section: 1.1 Overview

Title Page

1. The Proposed Scientific Program

1.1 Overview

1.2 Probing the Gluon Spin Distribution

1.2.1 Direct Photon Production

1.2.2 Dijet Production

1.2.3 Comparison to Other Techniques

1.3 Examples of Other Uses of the Endcap

1.3.1 Intermediate Vector Boson Production

1.3.2 Searches for Physics Beyond the Standard Model

1.3.3 Single-Spin Transverse Asymmetries

1.3.4 Quark Transversity Distributions in the Proton

1.3.5 The Unpolarized Gluon Distribution in Nuclei

1.3.6 Polarized Gluon Distribution in the Neutron

1.3.7 Spin-Dependent Fragmentation Functions in Hyperon Production

2. Design of the EEMC

2.1 Overview of the STAR Detector

2.2 Endcap Calorimeter Design Considerations and Summary

2.3 Active Elements of the EEMC

2.4 Mechanical and Structural Issues

2.5 Optical Systems

2.6 Electronics Issues

2.7 Integration Issues

3. Performance Issues and Simulations

3.1 Rate Capabilities

3.2 Jet Identification and xparton Reconstruction

3.3 Identification of Direct Photons

3.4 Electron/Hadron Separation

3.5 Effects of TPC Resolution Deterioration at h > 1

3.6 Extraction of Polarized Parton Distribution Functions

3.6.1 DG(x)

3.6.2 Dq(x)

3.7 Energy Calibration

3.8 Beam Polarization and Luminosity Monitoring

4. Budget, Management, Responsibilities and Timeline

4.1 Budget

4.2 Management of the Construction Project

4.3 Collaborating Institutions and Responsibilities

4.4 Timeline

References

A.1 Introduction

A.2 Description of the Simulation Program

A.2.1 PYTHIA

A.2.2 Inclusion of Polarization Observables

A.2.3 GEANT Studies of a Model Calorimeter

A.2.4 Simulation studies of the TPC response

A.3 Direct Photon Yields and Background Processes

A.3.1 Isolation Cuts

A.3.2 Analysis of Shower Maximum Data

A.4 Event Reconstruction

A.4.1 Jet Reconstruction

A.4.2 Partonic Kinematics Reconstruction

A.4.3 Predictions for ALL and Direct Determination of DG(x)

A.4.4 Background Contributions

A.4.5 Determination of Integral DG and EMC Calibrations

A.5 Summary

 

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Last update: Thu Nov 26 1998