Monte Carlo study of quantum number retention in hadron jets

Journal Article · Wed Apr 01 00:00:00 EST 1992 · Physical Review, D (Particles Fields); (United States)

DOI:https://doi.org/10.1103/PhysRevD.45.2360· OSTI ID:7044313

Hayward, S K; Weiss, N ^[1]

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1. Department of Physics, University of British Columbia, Vancouver, British Columbia, V6T 2A6 (Canada)

We present a Monte Carlo study in which we used weighted quantum numbers of hadron jets in an attempt to identify the parent parton of these jets. Two-jet events produced by {ital e}{sup +}{ital e{minus}} annihilation were studied using the Lund Monte Carlo program. It was found that the sign of the charge of the leading parton could be determined in a majority of events and that the quark jet could be distinguished from the antiquark jet in a majority of events containing baryons. A careful selection of a subset of the events by making cuts on the value of these weighted quantum numbers increased significantly the accuracy with which both the charge and the baryon number of the leading parton could be determined. Some success was also made in differentiating light-quark from heavy-quark events and in determining the leading quark flavor in the light-quark events. Unfortunately quantum number retention does not differentiate gluon jets from quark jets. The consequences of this for three-jet events and for jet identification in other reactions is discussed.

• OSTI ID: 7044313
• Journal Information: Physical Review, D (Particles Fields); (United States), Vol. 45:7; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
HADRONS
JET MODEL
QUANTUM NUMBERS
MONTE CARLO METHOD
ANNIHILATION
CROSS SECTIONS
ELECTRON-POSITRON INTERACTIONS
FLAVOR MODEL
GLUONS
MULTIPLICITY
PARTONS
QUANTUM CHROMODYNAMICS
QUARKS
BASIC INTERACTIONS
BOSONS
COMPOSITE MODELS
ELECTROMAGNETIC INTERACTIONS
ELEMENTARY PARTICLES
FERMIONS
FIELD THEORIES
INTERACTIONS
LEPTON-LEPTON INTERACTIONS
MATHEMATICAL MODELS
PARTICLE INTERACTIONS
PARTICLE MODELS
POSTULATED PARTICLES
QUANTUM FIELD THEORY
QUARK MODEL
662240* - Models for Strong Interactions- (1992-)
662230 - Quantum Chromodynamics- (1992-)