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Title: Production of {pi}{sup {+-}}, K{sup {+-}}, K{sup 0}, K*{sup 0}, {phi}, p and {Lambda}{sup 0} in hadronic Z{sup 0} decays

Abstract

The authors have measured production rates as a function of momentum of the identified hadrons {pi}{sup +}, K{sup +}, K{sup 0}, K*{sup 0}, {phi}, p, {Lambda}{sup 0} and their antihadrons in inclusive hadronic Z{sup 0} decays, as well as separately in decays into light, c and b flavors. In addition they have compared hadron and antihadron production rates in light quark (rather than antiquark) jets. The SLD Cherenkov Ring Imaging Detector was used to identify charged hadrons. The vertex detector was used to tag high-purity samples of light- and b-flavor events. The electron beam polarization was used to tag samples of quark and antiquark jets. Clear flavor dependences are observed, consistent with expectations based upon measured production and decay properties of heavy hadrons. They use the light-flavor results to test the predictions of MLLA QCD and of various fragmentation models. Differences between hadron and antihadron production in light quark jets are observed at high momentum fraction, providing direct evidence that higher-momentum particles are more likely to contain a primary quark or antiquark, and they use these results to make a new direct measurement of strangeness suppression in the jet fragmentation process.

Authors:
 [1];  [2];  [3];
  1. Nagoya Univ. (Japan)
  2. Tohoku Univ., Sendai (Japan)
  3. Stanford Univ., CA (United States). Stanford Linear Accelerator Center [and others
Publication Date:
Research Org.:
Stanford Linear Accelerator Center, Menlo Park, CA (United States); Boston Univ., MA (United States); California Univ., Santa Barbara, CA (United States); California Univ., Santa Cruz, CA (United States); Colorado State Univ., Fort Collins, CO (United States); Colorado Univ., Boulder, CO (United States); Illinois Univ., Urbana, IL (United States); California Univ., Berkeley, CA (United States); Massachusetts Univ., Amherst, MA (United States); Massachusetts Inst. of Tech., Cambridge, MA (United States); Oregon Univ., Eugene, OR (United States); Tennessee Univ., Knoxville, TN (United States); Wisconsin Univ., Madison, WI (United States); Yale Univ., New Haven, CT (United States)
Sponsoring Org.:
USDOE Office of Energy Research, Washington, DC (United States); National Science Foundation, Washington, DC (United States); United Kingdom Particle Physics and Astronomy Research Council (United Kingdom); Istituto Nazionale di Fisica Nucleare, Rome (Italy); Japan-US Cooperative Research Project on High Energy Physics, Nagoya (Japan); Korea Science and Engineering Foundation (Korea, Republic of)
OSTI Identifier:
521614
Report Number(s):
SLAC-PUB-7571; CONF-970787-1; CONF-970870-1
ON: DE97007964; CNN: Grant NSF PHY-91-13428;PHY-89-21320;PHY-92-04239;PHY-95-10439;PHY-88-19316;PHY-92-03212; TRN: 97:018423
DOE Contract Number:  
AC03-76SF00515; FG02-91ER40676; FG03-91ER40618; FG03-92ER40689; FG03-93ER40788; FG02-91ER40672; FG02-91ER40677; AC03-76SF00098; FG02-92ER40715; FC02-94ER40818; FG03-96ER40969; FG02-91ER40627; FG02-95ER40896; FG02-92ER40704
Resource Type:
Conference
Resource Relation:
Conference: 18. international symposium on lepton photon interactions, Hamburg (Germany); Jerusalem (Israel), 28 Jul - 1 Aug 1997; 19-26 Aug 1997; Other Information: PBD: Jun 1997
Country of Publication:
United States
Language:
English
Subject:
66 PHYSICS; Z NEUTRAL BOSONS; HADRONIC PARTICLE DECAY; HADRONS; PARTICLE PRODUCTION; ANTIPARTICLES; PARTICLE IDENTIFICATION; QUANTUM CHROMODYNAMICS; STRANGENESS; DIFFERENTIAL CROSS SECTIONS; PIONS; KAONS; K*0-1430 MESONS; PROTONS; LAMBDA PARTICLES

Citation Formats

Abe, K., Abe, K., Akagi, T., and SLD Collaboration. Production of {pi}{sup {+-}}, K{sup {+-}}, K{sup 0}, K*{sup 0}, {phi}, p and {Lambda}{sup 0} in hadronic Z{sup 0} decays. United States: N. p., 1997. Web.
Abe, K., Abe, K., Akagi, T., & SLD Collaboration. Production of {pi}{sup {+-}}, K{sup {+-}}, K{sup 0}, K*{sup 0}, {phi}, p and {Lambda}{sup 0} in hadronic Z{sup 0} decays. United States.
Abe, K., Abe, K., Akagi, T., and SLD Collaboration. Sun . "Production of {pi}{sup {+-}}, K{sup {+-}}, K{sup 0}, K*{sup 0}, {phi}, p and {Lambda}{sup 0} in hadronic Z{sup 0} decays". United States. https://www.osti.gov/servlets/purl/521614.
@article{osti_521614,
title = {Production of {pi}{sup {+-}}, K{sup {+-}}, K{sup 0}, K*{sup 0}, {phi}, p and {Lambda}{sup 0} in hadronic Z{sup 0} decays},
author = {Abe, K. and Abe, K. and Akagi, T. and SLD Collaboration},
abstractNote = {The authors have measured production rates as a function of momentum of the identified hadrons {pi}{sup +}, K{sup +}, K{sup 0}, K*{sup 0}, {phi}, p, {Lambda}{sup 0} and their antihadrons in inclusive hadronic Z{sup 0} decays, as well as separately in decays into light, c and b flavors. In addition they have compared hadron and antihadron production rates in light quark (rather than antiquark) jets. The SLD Cherenkov Ring Imaging Detector was used to identify charged hadrons. The vertex detector was used to tag high-purity samples of light- and b-flavor events. The electron beam polarization was used to tag samples of quark and antiquark jets. Clear flavor dependences are observed, consistent with expectations based upon measured production and decay properties of heavy hadrons. They use the light-flavor results to test the predictions of MLLA QCD and of various fragmentation models. Differences between hadron and antihadron production in light quark jets are observed at high momentum fraction, providing direct evidence that higher-momentum particles are more likely to contain a primary quark or antiquark, and they use these results to make a new direct measurement of strangeness suppression in the jet fragmentation process.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1997},
month = {6}
}

Conference:
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