Inclusive Eta Research Articles

Next to leading order eta production at hadron colliders

Inclusive eta production at hadron colliders is considered, based on the evaluation of the eta fragmentation functions at next to leading order. Absolute predictions at LHC and SSC are presented, including the ratio η/π0, together with the estimate of the theoretical uncertainty, as a possible neutral background to theH→γγ detection.

Production of eta and omega mesons in tau decay and a search for second-class currents.

The production of eta and ..omega.. mesons in tau decay has been studied with the CLEO detector. A sample of 42 000 e/sup +/e/sup -/..-->..tau/sup +/tau/sup -/ events at a mean ..sqrt..s of 10.5 GeV is used in the analysis. The branching ratio B(tau/sup -/..--> omega pi../sup -/..nu../sub tau/) is measured to be (1.60 +- 0.27 +- 0.41)%. No signal for eta production from tau decay is observed, resulting in 95%-confidence-level upper limits of 1.8% for B(tau/sup -/..-->..eta..pi../sup -/..nu../sub tau/), 2.1% for B(tau/sup -/..-->..eta..pi../sup -/..pi../sup 0/..nu../sub tau/), and 2.1% for inclusive eta production in tau decay. No evidence is found for decays proceeding via second-class currents.