Test of colour reconnection models using three-jet events in hadronic Z decays

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Abstract

Hadronic Z decays into three jets are used to test QCD models of colour reconnection (CR). A sensitive quantity is the rate of gluon jets with a gap in the particle rapidity distribution and zero jet charge. Gluon jets are identified by either energy-ordering or by tagging two b-jets. The rates predicted by two string-based tunable CR models, one implemented in JETSET (the GAL model), the other in ARIADNE, are too high and disfavoured by the data, whereas the rates from the corresponding non-CR standard versions of these generators are too low. The data can be described by the GAL model assuming a small value for the R(0) parameter in the range 0.01-0.02.
Lingua originaleEnglish
pagine (da-a)685-698
Numero di pagine14
RivistaTHE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS
Volume48
Stato di pubblicazionePublished - 2006

All Science Journal Classification (ASJC) codes

  • Engineering (miscellaneous)
  • Physics and Astronomy (miscellaneous)

Cita questo

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title = "Test of colour reconnection models using three-jet events in hadronic Z decays",
abstract = "Hadronic Z decays into three jets are used to test QCD models of colour reconnection (CR). A sensitive quantity is the rate of gluon jets with a gap in the particle rapidity distribution and zero jet charge. Gluon jets are identified by either energy-ordering or by tagging two b-jets. The rates predicted by two string-based tunable CR models, one implemented in JETSET (the GAL model), the other in ARIADNE, are too high and disfavoured by the data, whereas the rates from the corresponding non-CR standard versions of these generators are too low. The data can be described by the GAL model assuming a small value for the R(0) parameter in the range 0.01-0.02.",
keywords = "GLUON JETS; QUARK JETS; W-BOSON; LEP; QCD; FRAGMENTATION; SEARCH; MASS; ANNIHILATIONS; GENERATION",
author = "Giuseppe Raso",
year = "2006",
language = "English",
volume = "48",
pages = "685--698",
journal = "European Physical Journal C",
issn = "1434-6044",
publisher = "Springer New York",

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TY - JOUR

T1 - Test of colour reconnection models using three-jet events in hadronic Z decays

AU - Raso, Giuseppe

PY - 2006

Y1 - 2006

N2 - Hadronic Z decays into three jets are used to test QCD models of colour reconnection (CR). A sensitive quantity is the rate of gluon jets with a gap in the particle rapidity distribution and zero jet charge. Gluon jets are identified by either energy-ordering or by tagging two b-jets. The rates predicted by two string-based tunable CR models, one implemented in JETSET (the GAL model), the other in ARIADNE, are too high and disfavoured by the data, whereas the rates from the corresponding non-CR standard versions of these generators are too low. The data can be described by the GAL model assuming a small value for the R(0) parameter in the range 0.01-0.02.

AB - Hadronic Z decays into three jets are used to test QCD models of colour reconnection (CR). A sensitive quantity is the rate of gluon jets with a gap in the particle rapidity distribution and zero jet charge. Gluon jets are identified by either energy-ordering or by tagging two b-jets. The rates predicted by two string-based tunable CR models, one implemented in JETSET (the GAL model), the other in ARIADNE, are too high and disfavoured by the data, whereas the rates from the corresponding non-CR standard versions of these generators are too low. The data can be described by the GAL model assuming a small value for the R(0) parameter in the range 0.01-0.02.

KW - GLUON JETS; QUARK JETS; W-BOSON; LEP; QCD; FRAGMENTATION; SEARCH; MASS; ANNIHILATIONS; GENERATION

UR - http://hdl.handle.net/10447/3540

M3 - Article

VL - 48

SP - 685

EP - 698

JO - European Physical Journal C

JF - European Physical Journal C

SN - 1434-6044

ER -