Leptonic Signals for Compositeness at Hadron Colliders
Mar, 198524 pages
Part of Proceedings, 23RD International Conference on High Energy Physics, JULY 16-23, 1986, Berkeley, CA
Published in:
- Nucl.Phys.B 269 (1986) 421
Contribution to:
- Published: 1986
Report number:
- OITS-300,
- UCD-85-5,
- USC-85-22
Citations per year
Abstract: (Elsevier)
We consider composite models in which quarks and leptons have constituents in common. Detailed amplitudes for subprocesses of the type quark+antiquark → lepton+antilepton are constructed sing the presumed similarity between QCD and compositeness/pre-color interactions. We demonstrate that sensitivity to compositeness scales, Λ, as high as 100 TeV to 300 TeV may be achievable at a supercollider with center-of-mass energy, s = 40 TeV . For moderate values of Λ (≦15−20 TeV) cross sections are several orders of magnitude larger than the background Drell-Yan estimate, reflecting the presence of the new underlying strong interaction. Furthermore, some models exhibit a resonant structure in lepton anti-lepton pair mass spectra, near M ℓ ℓ ∼ Λ , corresponding to heavy preon-antipreon composite states. If Λ is in the SSC range, compositeness would probably dominate the cross sections of most processes and could readily be explored experimentally. Finally, at Sp̄pS energies, s = 540 GeV , observation of lepton-antilepton pair mass spectra with no deviation from the standard-model Drell-Yan prediction at M ℓ ℓ = 150 GeV would place limits on Λ in the range 1.5 to 3 TeV.- QUARK: MODEL
- LEPTON: MODEL
- MODEL: COMPOSITE
- QUARK ANTIQUARK: INTERACTION
- INTERACTION: QUARK ANTIQUARK
- MASS SPECTRUM: DILEPTON
- DILEPTON: MASS SPECTRUM
- DIFFERENTIAL CROSS SECTION
- SCATTERING AMPLITUDE
- PROPOSED EXPERIMENT
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