Title: Subjet Multiplicity in Quark and Gluon Jets at DZero
Link to paper if available:http://xxx.lanl.gov/abs/hep-ex/0106040
Session of First Preference: Hard High Energy QCD and Structure Functions
Session of Second Preference: Test of the Standard Model

LP Session: QCD Phenomenology

Abstract:
 
We measure the subjet multiplicity M in jets reconstructed with a
successive combination type of jet algorithm (k_T). We select jets
with 55<E_T<100 GeV and |eta| < 0.5. We compare similar samples of
jets at sqrt{s} = 1800 and 630 GeV. The HERWIG Monte Carlo simulation
predicts that 59% of the jets are gluon jets at sqrt{s} = 1800 GeV,
and 33% at sqrt{s} = 630 GeV. Using this information, we extract the
subjet multiplicity in quark (M_q) and gluon (M_g) jets. We also
measure the ratio 
R = (<M_q> -1)/(<M_g> -1) = 1.84 +/- 0.15 (stat) +0.22 -0.18 (sys).

Submitted:  9 April 2001