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Phys. Rev. Lett. 79, 2198–2203 (1997)

Limits on Quark-Lepton Compositeness Scales from Dileptons Produced in 1.8 TeV pp̅ Collisions

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F. Abe et al. (CDF Collaboration)
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Received 30 May 1997; published in the issue dated 22 September 1997

The dilepton mass spectrum in pp̅ →l+l-+X interactions is studied using dielectrons (ee) and dimuons (μμ) in 110 pb-1 of data collected with the Collider Detector at Fermilab. The data are consistent with standard model predictions. The mass spectrum, being a probe for new physics, is examined for new interactions of quarks and leptons from a common composite structure. Assuming a contact interaction with the conventional coupling g02/4π = 1, limits on chiral quark-electron and quark-muon compositeness scales in the range of 2.5 to 4.2 TeV are obtained.

© 1997 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.79.2198
DOI:
10.1103/PhysRevLett.79.2198
PACS:
12.60.Rc, 13.85.Qk, 13.85.Rm