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Title: A Study of Correlations Between Identified Charged Hadrons in Hadronic Z0 Decays

Abstract

The authors present a preliminary study of correlations in rapidity between pairs of identified charged pions, kaons and protons using the entire SLD data sample of 550,000 hadronic Z{sup 0} decays. Short range charge correlations are observed between all combinations of these hadron species, indicating local conservation of quantum numbers and charge ordering in the jet fragmentation process. The rapidity range of this effect is found to be independent of particle momentum. A strong long-range K{sup +}-K{sup {minus}} correlation is observed at high-momentum and weaker long-range pi{sup +}-pi{sup {minus}}, pi{sup +}-K{sup {minus}} p-K{sup {minus}} and p anti-p correlations are observed in light flavor events, providing new information on leading particle production in u, d and s jets. The long-range correlations observed in c anti-c and b anti-b events are markedly different and consistent with expectations based on known decay properties of the leading heavy hadrons. In addition, the SLC electron beam polarization is used to tag the quark hemisphere in each event, allowing the first study of rapidities signed such that positive rapidity is along the quark rather than antiquark direction. Distributions of ordered differences in signed rapidity between pairs of particles provide a direct probe of quantum number orderingmore » along the quark-antiquark axis and other new insights into the fragmentation process.« less

Authors:
Publication Date:
Research Org.:
Stanford Linear Accelerator Center,, Menlo Park, CA (US)
Sponsoring Org.:
USDOE Office of Energy Research (ER) (US)
OSTI Identifier:
764970
Report Number(s):
SLAC-PUB-8508
TRN: US0004954
DOE Contract Number:  
AC03-76SF00515
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: 6 Sep 2000
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; CORRELATIONS; HADRONIC PARTICLE DECAY; ELECTRON BEAMS; HADRONS; KAONS; LEADING PARTICLES; PIONS; POLARIZATION; PROTONS; QUANTUM NUMBERS; QUARKS; STANFORD LINEAR COLLIDER DETECTOR

Citation Formats

Burrows, Phil. A Study of Correlations Between Identified Charged Hadrons in Hadronic Z0 Decays. United States: N. p., 2000. Web. doi:10.2172/764970.
Burrows, Phil. A Study of Correlations Between Identified Charged Hadrons in Hadronic Z0 Decays. United States. doi:10.2172/764970.
Burrows, Phil. Wed . "A Study of Correlations Between Identified Charged Hadrons in Hadronic Z0 Decays". United States. doi:10.2172/764970. https://www.osti.gov/servlets/purl/764970.
@article{osti_764970,
title = {A Study of Correlations Between Identified Charged Hadrons in Hadronic Z0 Decays},
author = {Burrows, Phil},
abstractNote = {The authors present a preliminary study of correlations in rapidity between pairs of identified charged pions, kaons and protons using the entire SLD data sample of 550,000 hadronic Z{sup 0} decays. Short range charge correlations are observed between all combinations of these hadron species, indicating local conservation of quantum numbers and charge ordering in the jet fragmentation process. The rapidity range of this effect is found to be independent of particle momentum. A strong long-range K{sup +}-K{sup {minus}} correlation is observed at high-momentum and weaker long-range pi{sup +}-pi{sup {minus}}, pi{sup +}-K{sup {minus}} p-K{sup {minus}} and p anti-p correlations are observed in light flavor events, providing new information on leading particle production in u, d and s jets. The long-range correlations observed in c anti-c and b anti-b events are markedly different and consistent with expectations based on known decay properties of the leading heavy hadrons. In addition, the SLC electron beam polarization is used to tag the quark hemisphere in each event, allowing the first study of rapidities signed such that positive rapidity is along the quark rather than antiquark direction. Distributions of ordered differences in signed rapidity between pairs of particles provide a direct probe of quantum number ordering along the quark-antiquark axis and other new insights into the fragmentation process.},
doi = {10.2172/764970},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Wed Sep 06 00:00:00 EDT 2000},
month = {Wed Sep 06 00:00:00 EDT 2000}
}

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