U.S. Department of EnergyOffice of Scientific and Technical Information
Supercollider physics
Abstract
Several unsolved problems concerning backgrounds prevent one from claiming that some particular signal is clearly observable. One of the most critical issues concerns the observability of W's and Z's from their decays into hadronic jets. Many signals for new physics involve final states with W's or Z's (e.g. the minimal Higgs discussed in D). If one is restricted to observing the W's and Z's via their leptonic modes (which may not be possible for final states involving more than one W) only a small number of events will be detected - 5000 Z pairs decaying into ee and ..mu mu.. results in only 18 detected events. The physics background to hadronic decays of W and Z is from QCD events with multiple jets. In the case of final states with 4 jets we have no reliable QCD estimate. Many particle searches (e.g. supersymmetric ones) involve signals which have missing transverse momentum, so the importance of hermetic detectors with 4 ..pi.. coverage cannot be overstated. The difference between a pp and a proton-antiproton collider is limited to a few special cases where the presence of valence antiquarks in the anti-proton is important (for example is the production of a new W).more »
- Authors:
- Publication Date:
- Research Org.:
- Lawrence Berkeley Lab., CA (USA)
- OSTI Identifier:
- 7059906
- Report Number(s):
- LBL-17719; CONF-8403130-2
ON: DE84013237
- DOE Contract Number:
- AC03-76SF00098
- Resource Type:
- Conference
- Resource Relation:
- Conference: 4. topical workshop on proton antiproton collider physics, Bern, Switzerland, 5 Mar 1984
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 43 PARTICLE ACCELERATORS; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; SUPERCONDUCTING SUPER COLLIDER; EXPERIMENT PLANNING; FEASIBILITY STUDIES; JET MODEL; TEV RANGE 10-100; WEAK HADRONIC DECAY; WEAK INTERACTIONS; BASIC INTERACTIONS; DECAY; ENERGY RANGE; INTERACTIONS; MATHEMATICAL MODELS; PARTICLE DECAY; PARTICLE MODELS; PLANNING; STORAGE RINGS; TEV RANGE; WEAK PARTICLE DECAY; 430100* - Particle Accelerators- Design, Development, & Operation; 645100 - High Energy Physics- Particle Interactions & Properties-Experimental
Citation Formats
Hinchliffe, I. Supercollider physics. United States: N. p., 1984.
Web.
Hinchliffe, I. Supercollider physics. United States.
Hinchliffe, I. 1984.
"Supercollider physics". United States. https://www.osti.gov/servlets/purl/7059906.
@article{osti_7059906,
title = {Supercollider physics},
author = {Hinchliffe, I},
abstractNote = {Several unsolved problems concerning backgrounds prevent one from claiming that some particular signal is clearly observable. One of the most critical issues concerns the observability of W's and Z's from their decays into hadronic jets. Many signals for new physics involve final states with W's or Z's (e.g. the minimal Higgs discussed in D). If one is restricted to observing the W's and Z's via their leptonic modes (which may not be possible for final states involving more than one W) only a small number of events will be detected - 5000 Z pairs decaying into ee and ..mu mu.. results in only 18 detected events. The physics background to hadronic decays of W and Z is from QCD events with multiple jets. In the case of final states with 4 jets we have no reliable QCD estimate. Many particle searches (e.g. supersymmetric ones) involve signals which have missing transverse momentum, so the importance of hermetic detectors with 4 ..pi.. coverage cannot be overstated. The difference between a pp and a proton-antiproton collider is limited to a few special cases where the presence of valence antiquarks in the anti-proton is important (for example is the production of a new W). In order to exploit this advantage a certain minimum luminosity is required. (approx. 5 x 10/sup 31/ cm/sup -2/ sec/sup -1/ for ..sqrt..s = 40 TeV). A 40 TeV machine operating at a luminosity of at least 10/sup 32/ cm/sup -2/ sec/sup -1/, seems capable of answering the fundamental questions surrounding the breaking of weak interactions. The same assurance cannot be given for a 10 TeV Machine at the same luminosity. 23 references, 23 figures.},
doi = {},
url = {https://www.osti.gov/biblio/7059906},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Sun Apr 01 00:00:00 EST 1984},
month = {Sun Apr 01 00:00:00 EST 1984}
}