Experimental studies of unbiased gluon jets from e+e- annihilations using the jet boost algorithm

G. Abbiendi, C. Ainsley, P. F. Åkesson, G. Alexander, J. Allison, P. Amaral, G. Anagnostou, K. J. Anderson, S. Arcelli, S. Asai, D. Axen, G. Azuelos, I. Bailey, E. Barberio, T. Barillari, R. J. Barlow, R. J. Batley, P. Bechtle, T. Behnke, K. W. BellP. J. Bell, G. Bella, A. Bellerive, G. Benelli, S. Bethke, O. Biebel, O. Boeriu, P. Bock, M. Boutemeur, S. Braibant, L. Brigliadori, R. M. Brown, K. Buesser, H. J. Burckhart, S. Campana, R. K. Carnegie, B. Caron, A. A. Carter, J. R. Carter, C. Y. Chang, D. G. Charlton, C. Ciocca, A. Csilling, M. Cuffiani, S. Dado, A. De Roeck, E. A. De Wolf, K. Desch, B. Dienes, M. Donkers, J. Dubbert, E. Duchovni, G. Duckeck, I. P. Duerdoth, E. Etzion, F. Fabbri, L. Feld, P. Ferrari, F. Fiedler, I. Fleck, M. Ford, A. Frey, A. Fiirtjes, P. Gagnon, J. W. Gary, G. Gaycken, C. Geich-Gimbel, G. Giacomelli, P. Giacomelli, M. Giunta, J. Goldberg, E. Gross, J. Grunhaus, M. Gruwé, P. O. Günther, A. Gupta, C. Hajdu, M. Hamann, G. G. Hanson, A. Harel, M. Hauschild, C. M. Hawkes, R. Hawkings, R. J. Hemingway, C. Hensel, G. Herten, R. D. Heuer, J. C. Hill, K. Hoffman, D. Horváth, P. Igo-Kemenes, K. Ishii, H. Jeremie, P. Jovanovic, T. R. Junk, N. Kanaya, J. Kanzaki, D. Karlen, K. Kawagoe

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

We present the first experimental results based on the jet boost algorithm, a technique to select unbiased samples of gluon jets in e+e - annihilations, i.e. gluon jets free of biases introduced by event selection or jet finding criteria. Our results are derived from hadronic Z 0 decays observed with the OPAL detector at the LEP e +e- collider at CERN. First, we test the boost algorithm through studies with HERWIG Monte Carlo events and find that it provides accurate measurements of the charged particle multiplicity distributions of unbiased gluon jets for jet energies larger than about 5 GeV, and of the jet particle energy spectra (fragmentation functions) for jet energies larger than about 14 GeV. Second, we apply the boost algorithm to our data to derive unbiased measurements of the gluon jet multiplicity distribution for energies between about 5 and 18 GeV, and of the gluon jet fragmentation function at 14 and 18 GeV. In conjunction with our earlier results at 40 GeV, we then test QCD calculations for the energy evolution of the distributions, specifically the mean and first two nontrivial normalized factorial moments of the multiplicity distribution, and the fragmentation function. The theoretical results are found to be in global agreement with the data, although the factorial moments are not svell described for jet energies below about 14 GeV.

Original languageEnglish
Article number032002
JournalPhysical Review D
Volume69
Issue number3
DOIs
Publication statusPublished - Jan 1 2004
Externally publishedYes

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acceleration (physics)
fragmentation
energy
moments
free jets
particle energy
charged particles
energy spectra
quantum chromodynamics
detectors
decay

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)

Cite this

Experimental studies of unbiased gluon jets from e+e- annihilations using the jet boost algorithm. / Abbiendi, G.; Ainsley, C.; Åkesson, P. F.; Alexander, G.; Allison, J.; Amaral, P.; Anagnostou, G.; Anderson, K. J.; Arcelli, S.; Asai, S.; Axen, D.; Azuelos, G.; Bailey, I.; Barberio, E.; Barillari, T.; Barlow, R. J.; Batley, R. J.; Bechtle, P.; Behnke, T.; Bell, K. W.; Bell, P. J.; Bella, G.; Bellerive, A.; Benelli, G.; Bethke, S.; Biebel, O.; Boeriu, O.; Bock, P.; Boutemeur, M.; Braibant, S.; Brigliadori, L.; Brown, R. M.; Buesser, K.; Burckhart, H. J.; Campana, S.; Carnegie, R. K.; Caron, B.; Carter, A. A.; Carter, J. R.; Chang, C. Y.; Charlton, D. G.; Ciocca, C.; Csilling, A.; Cuffiani, M.; Dado, S.; De Roeck, A.; De Wolf, E. A.; Desch, K.; Dienes, B.; Donkers, M.; Dubbert, J.; Duchovni, E.; Duckeck, G.; Duerdoth, I. P.; Etzion, E.; Fabbri, F.; Feld, L.; Ferrari, P.; Fiedler, F.; Fleck, I.; Ford, M.; Frey, A.; Fiirtjes, A.; Gagnon, P.; Gary, J. W.; Gaycken, G.; Geich-Gimbel, C.; Giacomelli, G.; Giacomelli, P.; Giunta, M.; Goldberg, J.; Gross, E.; Grunhaus, J.; Gruwé, M.; Günther, P. O.; Gupta, A.; Hajdu, C.; Hamann, M.; Hanson, G. G.; Harel, A.; Hauschild, M.; Hawkes, C. M.; Hawkings, R.; Hemingway, R. J.; Hensel, C.; Herten, G.; Heuer, R. D.; Hill, J. C.; Hoffman, K.; Horváth, D.; Igo-Kemenes, P.; Ishii, K.; Jeremie, H.; Jovanovic, P.; Junk, T. R.; Kanaya, N.; Kanzaki, J.; Karlen, D.; Kawagoe, K.

In: Physical Review D, Vol. 69, No. 3, 032002, 01.01.2004.

Research output: Contribution to journalArticle

Abbiendi, G, Ainsley, C, Åkesson, PF, Alexander, G, Allison, J, Amaral, P, Anagnostou, G, Anderson, KJ, Arcelli, S, Asai, S, Axen, D, Azuelos, G, Bailey, I, Barberio, E, Barillari, T, Barlow, RJ, Batley, RJ, Bechtle, P, Behnke, T, Bell, KW, Bell, PJ, Bella, G, Bellerive, A, Benelli, G, Bethke, S, Biebel, O, Boeriu, O, Bock, P, Boutemeur, M, Braibant, S, Brigliadori, L, Brown, RM, Buesser, K, Burckhart, HJ, Campana, S, Carnegie, RK, Caron, B, Carter, AA, Carter, JR, Chang, CY, Charlton, DG, Ciocca, C, Csilling, A, Cuffiani, M, Dado, S, De Roeck, A, De Wolf, EA, Desch, K, Dienes, B, Donkers, M, Dubbert, J, Duchovni, E, Duckeck, G, Duerdoth, IP, Etzion, E, Fabbri, F, Feld, L, Ferrari, P, Fiedler, F, Fleck, I, Ford, M, Frey, A, Fiirtjes, A, Gagnon, P, Gary, JW, Gaycken, G, Geich-Gimbel, C, Giacomelli, G, Giacomelli, P, Giunta, M, Goldberg, J, Gross, E, Grunhaus, J, Gruwé, M, Günther, PO, Gupta, A, Hajdu, C, Hamann, M, Hanson, GG, Harel, A, Hauschild, M, Hawkes, CM, Hawkings, R, Hemingway, RJ, Hensel, C, Herten, G, Heuer, RD, Hill, JC, Hoffman, K, Horváth, D, Igo-Kemenes, P, Ishii, K, Jeremie, H, Jovanovic, P, Junk, TR, Kanaya, N, Kanzaki, J, Karlen, D & Kawagoe, K 2004, 'Experimental studies of unbiased gluon jets from e+e- annihilations using the jet boost algorithm', Physical Review D, vol. 69, no. 3, 032002. https://doi.org/10.1103/PhysRevD.69.032002
Abbiendi G, Ainsley C, Åkesson PF, Alexander G, Allison J, Amaral P et al. Experimental studies of unbiased gluon jets from e+e- annihilations using the jet boost algorithm. Physical Review D. 2004 Jan 1;69(3). 032002. https://doi.org/10.1103/PhysRevD.69.032002
Abbiendi, G. ; Ainsley, C. ; Åkesson, P. F. ; Alexander, G. ; Allison, J. ; Amaral, P. ; Anagnostou, G. ; Anderson, K. J. ; Arcelli, S. ; Asai, S. ; Axen, D. ; Azuelos, G. ; Bailey, I. ; Barberio, E. ; Barillari, T. ; Barlow, R. J. ; Batley, R. J. ; Bechtle, P. ; Behnke, T. ; Bell, K. W. ; Bell, P. J. ; Bella, G. ; Bellerive, A. ; Benelli, G. ; Bethke, S. ; Biebel, O. ; Boeriu, O. ; Bock, P. ; Boutemeur, M. ; Braibant, S. ; Brigliadori, L. ; Brown, R. M. ; Buesser, K. ; Burckhart, H. J. ; Campana, S. ; Carnegie, R. K. ; Caron, B. ; Carter, A. A. ; Carter, J. R. ; Chang, C. Y. ; Charlton, D. G. ; Ciocca, C. ; Csilling, A. ; Cuffiani, M. ; Dado, S. ; De Roeck, A. ; De Wolf, E. A. ; Desch, K. ; Dienes, B. ; Donkers, M. ; Dubbert, J. ; Duchovni, E. ; Duckeck, G. ; Duerdoth, I. P. ; Etzion, E. ; Fabbri, F. ; Feld, L. ; Ferrari, P. ; Fiedler, F. ; Fleck, I. ; Ford, M. ; Frey, A. ; Fiirtjes, A. ; Gagnon, P. ; Gary, J. W. ; Gaycken, G. ; Geich-Gimbel, C. ; Giacomelli, G. ; Giacomelli, P. ; Giunta, M. ; Goldberg, J. ; Gross, E. ; Grunhaus, J. ; Gruwé, M. ; Günther, P. O. ; Gupta, A. ; Hajdu, C. ; Hamann, M. ; Hanson, G. G. ; Harel, A. ; Hauschild, M. ; Hawkes, C. M. ; Hawkings, R. ; Hemingway, R. J. ; Hensel, C. ; Herten, G. ; Heuer, R. D. ; Hill, J. C. ; Hoffman, K. ; Horváth, D. ; Igo-Kemenes, P. ; Ishii, K. ; Jeremie, H. ; Jovanovic, P. ; Junk, T. R. ; Kanaya, N. ; Kanzaki, J. ; Karlen, D. ; Kawagoe, K. / Experimental studies of unbiased gluon jets from e+e- annihilations using the jet boost algorithm. In: Physical Review D. 2004 ; Vol. 69, No. 3.
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abstract = "We present the first experimental results based on the jet boost algorithm, a technique to select unbiased samples of gluon jets in e+e - annihilations, i.e. gluon jets free of biases introduced by event selection or jet finding criteria. Our results are derived from hadronic Z 0 decays observed with the OPAL detector at the LEP e +e- collider at CERN. First, we test the boost algorithm through studies with HERWIG Monte Carlo events and find that it provides accurate measurements of the charged particle multiplicity distributions of unbiased gluon jets for jet energies larger than about 5 GeV, and of the jet particle energy spectra (fragmentation functions) for jet energies larger than about 14 GeV. Second, we apply the boost algorithm to our data to derive unbiased measurements of the gluon jet multiplicity distribution for energies between about 5 and 18 GeV, and of the gluon jet fragmentation function at 14 and 18 GeV. In conjunction with our earlier results at 40 GeV, we then test QCD calculations for the energy evolution of the distributions, specifically the mean and first two nontrivial normalized factorial moments of the multiplicity distribution, and the fragmentation function. The theoretical results are found to be in global agreement with the data, although the factorial moments are not svell described for jet energies below about 14 GeV.",
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TY - JOUR

T1 - Experimental studies of unbiased gluon jets from e+e- annihilations using the jet boost algorithm

AU - Abbiendi, G.

AU - Ainsley, C.

AU - Åkesson, P. F.

AU - Alexander, G.

AU - Allison, J.

AU - Amaral, P.

AU - Anagnostou, G.

AU - Anderson, K. J.

AU - Arcelli, S.

AU - Asai, S.

AU - Axen, D.

AU - Azuelos, G.

AU - Bailey, I.

AU - Barberio, E.

AU - Barillari, T.

AU - Barlow, R. J.

AU - Batley, R. J.

AU - Bechtle, P.

AU - Behnke, T.

AU - Bell, K. W.

AU - Bell, P. J.

AU - Bella, G.

AU - Bellerive, A.

AU - Benelli, G.

AU - Bethke, S.

AU - Biebel, O.

AU - Boeriu, O.

AU - Bock, P.

AU - Boutemeur, M.

AU - Braibant, S.

AU - Brigliadori, L.

AU - Brown, R. M.

AU - Buesser, K.

AU - Burckhart, H. J.

AU - Campana, S.

AU - Carnegie, R. K.

AU - Caron, B.

AU - Carter, A. A.

AU - Carter, J. R.

AU - Chang, C. Y.

AU - Charlton, D. G.

AU - Ciocca, C.

AU - Csilling, A.

AU - Cuffiani, M.

AU - Dado, S.

AU - De Roeck, A.

AU - De Wolf, E. A.

AU - Desch, K.

AU - Dienes, B.

AU - Donkers, M.

AU - Dubbert, J.

AU - Duchovni, E.

AU - Duckeck, G.

AU - Duerdoth, I. P.

AU - Etzion, E.

AU - Fabbri, F.

AU - Feld, L.

AU - Ferrari, P.

AU - Fiedler, F.

AU - Fleck, I.

AU - Ford, M.

AU - Frey, A.

AU - Fiirtjes, A.

AU - Gagnon, P.

AU - Gary, J. W.

AU - Gaycken, G.

AU - Geich-Gimbel, C.

AU - Giacomelli, G.

AU - Giacomelli, P.

AU - Giunta, M.

AU - Goldberg, J.

AU - Gross, E.

AU - Grunhaus, J.

AU - Gruwé, M.

AU - Günther, P. O.

AU - Gupta, A.

AU - Hajdu, C.

AU - Hamann, M.

AU - Hanson, G. G.

AU - Harel, A.

AU - Hauschild, M.

AU - Hawkes, C. M.

AU - Hawkings, R.

AU - Hemingway, R. J.

AU - Hensel, C.

AU - Herten, G.

AU - Heuer, R. D.

AU - Hill, J. C.

AU - Hoffman, K.

AU - Horváth, D.

AU - Igo-Kemenes, P.

AU - Ishii, K.

AU - Jeremie, H.

AU - Jovanovic, P.

AU - Junk, T. R.

AU - Kanaya, N.

AU - Kanzaki, J.

AU - Karlen, D.

AU - Kawagoe, K.

PY - 2004/1/1

Y1 - 2004/1/1

N2 - We present the first experimental results based on the jet boost algorithm, a technique to select unbiased samples of gluon jets in e+e - annihilations, i.e. gluon jets free of biases introduced by event selection or jet finding criteria. Our results are derived from hadronic Z 0 decays observed with the OPAL detector at the LEP e +e- collider at CERN. First, we test the boost algorithm through studies with HERWIG Monte Carlo events and find that it provides accurate measurements of the charged particle multiplicity distributions of unbiased gluon jets for jet energies larger than about 5 GeV, and of the jet particle energy spectra (fragmentation functions) for jet energies larger than about 14 GeV. Second, we apply the boost algorithm to our data to derive unbiased measurements of the gluon jet multiplicity distribution for energies between about 5 and 18 GeV, and of the gluon jet fragmentation function at 14 and 18 GeV. In conjunction with our earlier results at 40 GeV, we then test QCD calculations for the energy evolution of the distributions, specifically the mean and first two nontrivial normalized factorial moments of the multiplicity distribution, and the fragmentation function. The theoretical results are found to be in global agreement with the data, although the factorial moments are not svell described for jet energies below about 14 GeV.

AB - We present the first experimental results based on the jet boost algorithm, a technique to select unbiased samples of gluon jets in e+e - annihilations, i.e. gluon jets free of biases introduced by event selection or jet finding criteria. Our results are derived from hadronic Z 0 decays observed with the OPAL detector at the LEP e +e- collider at CERN. First, we test the boost algorithm through studies with HERWIG Monte Carlo events and find that it provides accurate measurements of the charged particle multiplicity distributions of unbiased gluon jets for jet energies larger than about 5 GeV, and of the jet particle energy spectra (fragmentation functions) for jet energies larger than about 14 GeV. Second, we apply the boost algorithm to our data to derive unbiased measurements of the gluon jet multiplicity distribution for energies between about 5 and 18 GeV, and of the gluon jet fragmentation function at 14 and 18 GeV. In conjunction with our earlier results at 40 GeV, we then test QCD calculations for the energy evolution of the distributions, specifically the mean and first two nontrivial normalized factorial moments of the multiplicity distribution, and the fragmentation function. The theoretical results are found to be in global agreement with the data, although the factorial moments are not svell described for jet energies below about 14 GeV.

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U2 - 10.1103/PhysRevD.69.032002

DO - 10.1103/PhysRevD.69.032002

M3 - Article

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JO - Physical Review D - Particles, Fields, Gravitation and Cosmology

JF - Physical Review D - Particles, Fields, Gravitation and Cosmology

SN - 1550-7998

IS - 3

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