Acosta, D;
Affolder, T;
Albrow, MG;
Ambrose, D;
Amidei, D;
Anikeev, K;
Antos, J;
... CDF Collaboration; + view all
(2005)
Measurement of charged-particle multiplicities in gluon and quark jets in p(p)over-bar collisions at root s=1.8 TeV.
PHYS REV LETT
, 94
(17)
, Article 171802. 10.1103/PhysRevLett.94.171802.
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Abstract
We report the first largely model independent measurement of charged particle multiplicities in quark and gluon jets, N-q and N-g, produced at the Fermilab Tevatron in p (p) over bar collisions with a center-of-mass energy of 1.8 TeV and recorded by the Collider Detector at Fermilab. The measurements are made for jets with average energies of 41 and 53 GeV by counting charged particle tracks in cones with opening angles of theta(c)=0.28, 0.36, and 0.47 rad around the jet axis. The corresponding jet hardness Q=E-jet theta(c) varies in the range from 12 to 25 GeV. At Q=19.2 GeV, the ratio of multiplicities r=N-g/N-q is found to be 1.64 +/- 0.17, where statistical and systematic uncertainties are added in quadrature. The results are in agreement with resummed perturbative QCD calculations.
| Type: | Article |
|---|---|
| Title: | Measurement of charged-particle multiplicities in gluon and quark jets in p(p)over-bar collisions at root s=1.8 TeV |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevLett.94.171802 |
| Publisher version: | http://dx.doi.org/10.1103/PhysRevLett.94.171802 |
| Language: | English |
| Additional information: | © 2005 The American Physical Society |
| Keywords: | E+E-ANNIHILATION, HADRON SPECTRA, QCD JETS, EVENTS, HEAVY, FRAGMENTATION, DISTRIBUTIONS, DECAYS, PARTON |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/131765 |
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