The ALEPH collaboration

Measurements of the strong coupling constant and the QCD colour factors using four-jet observables from hadronic Z decays

A. Heister, S. Schael, R. Barate, I. De Bonis, D. Decamp, C. Goy, J. P. Lees, E. Merle, M. N. Minard, B. Pietrzyk, G. Boix, S. Bravo, M. P. Casado, M. Chmeissani, J. M. Crespo, E. Fernandez, M. Fernandez-Bosman, L. Garrido, E. Graugés, M. Martinez & 252 others G. Merino, R. Miquel, L. M. Mir, A. Pacheco, H. Ruiz, A. Colaleo, D. Creanza, M. de Palma, G. Iaselli, G. Maggi, M. Maggi, S. Nuzzo, A. Ranieri, G. Raso, F. Ruggieri, G. Selvaggi, L. Silvestris, P. Tempesta, A. Tricomi, G. Zito, X. Huang, J. Lin, Q. Ouyang, T. Wang, Y. Xie, R. Xu, S. Xue, J. Zhang, L. Zhang, W. Zhao, D. Abbaneo, P. Azzurri, O. Buchmüller, M. Cattaneo, F. Cerutti, B. Clerbaux, H. Drevermann, R. W. Forty, M. Frank, F. Gianotti, T. C. Greening, J. B. Hansen, J. Harvey, D. E. Hutchcroft, P. Janot, B. Jost, M. Kado, P. Mato, A. Moutoussi, F. Ranjard, L. Rolandi, D. Schlatter, O. Schneider, G. Sguazzoni, W. Tejessy, F. Teubert, A. Valassi, I. Videau, J. Ward, F. Badaud, A. Falvard, P. Gay, P. Henrard, J. Jousset, B. Michel, S. Monteil, J. C. Montret, D. Pallin, P. Perret, J. D. Hansen, J. R. Hansen, P. H. Hansen, B. S. Nilsson, A. Kyriakis, C. Markou, E. Simopoulou, A. Vayaki, K. Zachariadou, A. Blondel, G. Bonneaud, J. C. Brient, A. Rougé, M. Rumpf, M. Swynghedauw, M. Verderi, H. Videau, V. Ciulli, E. Focardi, G. Parrini, A. Antonelli, M. Antonelli, G. Bencivenni, F. Bossi, P. Campana, G. Capon, V. Chiarella, P. Laurelli, G. Mannocchi, F. Murtas, G. P. Murtas, L. Passalacqua, M. Pepe-Altarelli, A. Halley, J. G. Lynch, P. Negus, V. O'Shea, C. Raine, A. S. Thompson, S. Wasserbaech, R. Cavanaugh, S. Dhamotharan, C. Geweniger, P. Hanke, V. Hepp, E. E. Kluge, A. Putzer, H. Stenzel, K. Tittel, M. Wunsch, R. Beuselinck, D. M. Binnie, W. Cameron, P. J. Dornan, M. Girone, N. Marinelli, J. K. Sedgbeer, J. C. Thompson, V. M. Ghete, P. Girtler, E. Kneringer, D. Kuhn, G. Rudolph, E. Bouhova-Thacker, C. K. Bowdery, A. J. Finch, F. Foster, G. Hughes, R. W L Jones, M. R. Pearson, N. A. Robertson, K. Jakobs, K. Kleinknecht, G. Quast, B. Renk, H. G. Sander, H. Wachsmuth, C. Zeitnitz, A. Bonissent, P. Coyle, O. Leroy, P. Payre, D. Rousseau, M. Talby, F. Ragusa, A. David, H. Dietl, G. Ganis, K. Hüttmann, G. Lütjens, W. Männer, H. G. Moser, R. Settles, W. Wiedenmann, G. Wolf, J. Boucrot, O. Callot, M. Davier, L. Duflot, J. F. Grivaz, P. Heusse, A. Jacholkowska, J. Lefrançois, J. J. Veillet, C. Yuan, G. Bagliesi, T. Boccali, L. Foà, A. Giammanco, A. Giassi, F. Ligabue, A. Messineo, F. Palla, G. Sanguinetti, A. Sciabà, P. Spagnolo, R. Tenchini, A. Venturi, P. G. Verdini, Z. Xie, G. A. Blair, G. Cowan, M. G. Green, T. Medcalf, A. Misiejuk, J. A. Strong, P. Teixeira-Dias, R. W. Clifft, T. R. Edgecock, P. R. Norton, I. R. Tomalin, B. Bloch-Devaux, P. Colas, S. Emery, W. Kozanecki, E. Lançon, M. C. Lemaire, E. Locci, P. Perez, J. Rander, J. F. Renardy, A. Roussarie, J. P. Schuller, J. Schwindling, A. Trabelsi, B. Vallage, N. Konstantinidis, A. M. Litke, G. Taylor, C. N. Booth, S. Cartwright, F. Combley, M. Lehto, L. F. Thompson, K. Affholderbach, A. Böhrer, S. Brandt, C. Grupen, A. Ngac, G. Prange, U. Sieler, G. Giannini, J. Rothberg, S. R. Armstrong, K. Berkelman, K. Cranmer, D. P S Ferguson, Y. Gao, S. González, O. J. Hayes, H. Hu, S. Jin, J. Kile, P. A. McNamara, J. Nielsen, Y. B. Pan, J. H. von Wimmersperg-Toeller, W. Wiedenmann, J. Wu, S. L. Wu, X. Wu, G. Zobernig, G. Dissertori

    Research output: Contribution to journalArticle

    Abstract

    Data from e+e- annihilation into hadrons, taken with the ALEPH detector at the Z resonance, are analyzed. The four-jet rate is studied as a function of the resolution parameter and compared to next-to-leading order calculations combined with resummation of large logarithms. Angular correlations in four-jet events are measured and compared to next-to-leading order QCD predictions. With these observables two different measurements are performed. In a first analysis the strong coupling constant is measured from the four-jet rate yielding αs(MZ) = 0.1170 ± 0.0001 (stat) ± 0.0013(sys). In a second measurement the strong coupling constant and the QCD colour factors are determined simultaneously from a fit to the four-jet rate and the four-jet angular correlations, giving αs(MZ) = 0.119 ± 0.006(stat) ± 0.026(sys) CA = 2.93 ± 0.14(stat) ± 0.58(sys) CF = 1.35 ± 0.07(stat) ± 0.26(sys) in good agreement with the expectation from QCD.

    Original languageEnglish (US)
    Pages (from-to)1-17
    Number of pages17
    JournalEuropean Physical Journal C
    Volume27
    Issue number1
    StatePublished - Mar 2003

    Fingerprint

    quantum chromodynamics
    Color
    color
    decay
    angular correlation
    Hadrons
    logarithms
    hadrons
    Detectors
    detectors
    predictions

    ASJC Scopus subject areas

    • Nuclear and High Energy Physics

    Cite this

    Heister, A., Schael, S., Barate, R., De Bonis, I., Decamp, D., Goy, C., ... Dissertori, G. (2003). The ALEPH collaboration: Measurements of the strong coupling constant and the QCD colour factors using four-jet observables from hadronic Z decays. European Physical Journal C, 27(1), 1-17.

    The ALEPH collaboration : Measurements of the strong coupling constant and the QCD colour factors using four-jet observables from hadronic Z decays. / Heister, A.; Schael, S.; Barate, R.; De Bonis, I.; Decamp, D.; Goy, C.; Lees, J. P.; Merle, E.; Minard, M. N.; Pietrzyk, B.; Boix, G.; Bravo, S.; Casado, M. P.; Chmeissani, M.; Crespo, J. M.; Fernandez, E.; Fernandez-Bosman, M.; Garrido, L.; Graugés, E.; Martinez, M.; Merino, G.; Miquel, R.; Mir, L. M.; Pacheco, A.; Ruiz, H.; Colaleo, A.; Creanza, D.; de Palma, M.; Iaselli, G.; Maggi, G.; Maggi, M.; Nuzzo, S.; Ranieri, A.; Raso, G.; Ruggieri, F.; Selvaggi, G.; Silvestris, L.; Tempesta, P.; Tricomi, A.; Zito, G.; Huang, X.; Lin, J.; Ouyang, Q.; Wang, T.; Xie, Y.; Xu, R.; Xue, S.; Zhang, J.; Zhang, L.; Zhao, W.; Abbaneo, D.; Azzurri, P.; Buchmüller, O.; Cattaneo, M.; Cerutti, F.; Clerbaux, B.; Drevermann, H.; Forty, R. W.; Frank, M.; Gianotti, F.; Greening, T. C.; Hansen, J. B.; Harvey, J.; Hutchcroft, D. E.; Janot, P.; Jost, B.; Kado, M.; Mato, P.; Moutoussi, A.; Ranjard, F.; Rolandi, L.; Schlatter, D.; Schneider, O.; Sguazzoni, G.; Tejessy, W.; Teubert, F.; Valassi, A.; Videau, I.; Ward, J.; Badaud, F.; Falvard, A.; Gay, P.; Henrard, P.; Jousset, J.; Michel, B.; Monteil, S.; Montret, J. C.; Pallin, D.; Perret, P.; Hansen, J. D.; Hansen, J. R.; Hansen, P. H.; Nilsson, B. S.; Kyriakis, A.; Markou, C.; Simopoulou, E.; Vayaki, A.; Zachariadou, K.; Blondel, A.; Bonneaud, G.; Brient, J. C.; Rougé, A.; Rumpf, M.; Swynghedauw, M.; Verderi, M.; Videau, H.; Ciulli, V.; Focardi, E.; Parrini, G.; Antonelli, A.; Antonelli, M.; Bencivenni, G.; Bossi, F.; Campana, P.; Capon, G.; Chiarella, V.; Laurelli, P.; Mannocchi, G.; Murtas, F.; Murtas, G. P.; Passalacqua, L.; Pepe-Altarelli, M.; Halley, A.; Lynch, J. G.; Negus, P.; O'Shea, V.; Raine, C.; Thompson, A. S.; Wasserbaech, S.; Cavanaugh, R.; Dhamotharan, S.; Geweniger, C.; Hanke, P.; Hepp, V.; Kluge, E. E.; Putzer, A.; Stenzel, H.; Tittel, K.; Wunsch, M.; Beuselinck, R.; Binnie, D. M.; Cameron, W.; Dornan, P. J.; Girone, M.; Marinelli, N.; Sedgbeer, J. K.; Thompson, J. C.; Ghete, V. M.; Girtler, P.; Kneringer, E.; Kuhn, D.; Rudolph, G.; Bouhova-Thacker, E.; Bowdery, C. K.; Finch, A. J.; Foster, F.; Hughes, G.; Jones, R. W L; Pearson, M. R.; Robertson, N. A.; Jakobs, K.; Kleinknecht, K.; Quast, G.; Renk, B.; Sander, H. G.; Wachsmuth, H.; Zeitnitz, C.; Bonissent, A.; Coyle, P.; Leroy, O.; Payre, P.; Rousseau, D.; Talby, M.; Ragusa, F.; David, A.; Dietl, H.; Ganis, G.; Hüttmann, K.; Lütjens, G.; Männer, W.; Moser, H. G.; Settles, R.; Wiedenmann, W.; Wolf, G.; Boucrot, J.; Callot, O.; Davier, M.; Duflot, L.; Grivaz, J. F.; Heusse, P.; Jacholkowska, A.; Lefrançois, J.; Veillet, J. J.; Yuan, C.; Bagliesi, G.; Boccali, T.; Foà, L.; Giammanco, A.; Giassi, A.; Ligabue, F.; Messineo, A.; Palla, F.; Sanguinetti, G.; Sciabà, A.; Spagnolo, P.; Tenchini, R.; Venturi, A.; Verdini, P. G.; Xie, Z.; Blair, G. A.; Cowan, G.; Green, M. G.; Medcalf, T.; Misiejuk, A.; Strong, J. A.; Teixeira-Dias, P.; Clifft, R. W.; Edgecock, T. R.; Norton, P. R.; Tomalin, I. R.; Bloch-Devaux, B.; Colas, P.; Emery, S.; Kozanecki, W.; Lançon, E.; Lemaire, M. C.; Locci, E.; Perez, P.; Rander, J.; Renardy, J. F.; Roussarie, A.; Schuller, J. P.; Schwindling, J.; Trabelsi, A.; Vallage, B.; Konstantinidis, N.; Litke, A. M.; Taylor, G.; Booth, C. N.; Cartwright, S.; Combley, F.; Lehto, M.; Thompson, L. F.; Affholderbach, K.; Böhrer, A.; Brandt, S.; Grupen, C.; Ngac, A.; Prange, G.; Sieler, U.; Giannini, G.; Rothberg, J.; Armstrong, S. R.; Berkelman, K.; Cranmer, K.; Ferguson, D. P S; Gao, Y.; González, S.; Hayes, O. J.; Hu, H.; Jin, S.; Kile, J.; McNamara, P. A.; Nielsen, J.; Pan, Y. B.; von Wimmersperg-Toeller, J. H.; Wiedenmann, W.; Wu, J.; Wu, S. L.; Wu, X.; Zobernig, G.; Dissertori, G.

    In: European Physical Journal C, Vol. 27, No. 1, 03.2003, p. 1-17.

    Research output: Contribution to journalArticle

    Heister, A, Schael, S, Barate, R, De Bonis, I, Decamp, D, Goy, C, Lees, JP, Merle, E, Minard, MN, Pietrzyk, B, Boix, G, Bravo, S, Casado, MP, Chmeissani, M, Crespo, JM, Fernandez, E, Fernandez-Bosman, M, Garrido, L, Graugés, E, Martinez, M, Merino, G, Miquel, R, Mir, LM, Pacheco, A, Ruiz, H, Colaleo, A, Creanza, D, de Palma, M, Iaselli, G, Maggi, G, Maggi, M, Nuzzo, S, Ranieri, A, Raso, G, Ruggieri, F, Selvaggi, G, Silvestris, L, Tempesta, P, Tricomi, A, Zito, G, Huang, X, Lin, J, Ouyang, Q, Wang, T, Xie, Y, Xu, R, Xue, S, Zhang, J, Zhang, L, Zhao, W, Abbaneo, D, Azzurri, P, Buchmüller, O, Cattaneo, M, Cerutti, F, Clerbaux, B, Drevermann, H, Forty, RW, Frank, M, Gianotti, F, Greening, TC, Hansen, JB, Harvey, J, Hutchcroft, DE, Janot, P, Jost, B, Kado, M, Mato, P, Moutoussi, A, Ranjard, F, Rolandi, L, Schlatter, D, Schneider, O, Sguazzoni, G, Tejessy, W, Teubert, F, Valassi, A, Videau, I, Ward, J, Badaud, F, Falvard, A, Gay, P, Henrard, P, Jousset, J, Michel, B, Monteil, S, Montret, JC, Pallin, D, Perret, P, Hansen, JD, Hansen, JR, Hansen, PH, Nilsson, BS, Kyriakis, A, Markou, C, Simopoulou, E, Vayaki, A, Zachariadou, K, Blondel, A, Bonneaud, G, Brient, JC, Rougé, A, Rumpf, M, Swynghedauw, M, Verderi, M, Videau, H, Ciulli, V, Focardi, E, Parrini, G, Antonelli, A, Antonelli, M, Bencivenni, G, Bossi, F, Campana, P, Capon, G, Chiarella, V, Laurelli, P, Mannocchi, G, Murtas, F, Murtas, GP, Passalacqua, L, Pepe-Altarelli, M, Halley, A, Lynch, JG, Negus, P, O'Shea, V, Raine, C, Thompson, AS, Wasserbaech, S, Cavanaugh, R, Dhamotharan, S, Geweniger, C, Hanke, P, Hepp, V, Kluge, EE, Putzer, A, Stenzel, H, Tittel, K, Wunsch, M, Beuselinck, R, Binnie, DM, Cameron, W, Dornan, PJ, Girone, M, Marinelli, N, Sedgbeer, JK, Thompson, JC, Ghete, VM, Girtler, P, Kneringer, E, Kuhn, D, Rudolph, G, Bouhova-Thacker, E, Bowdery, CK, Finch, AJ, Foster, F, Hughes, G, Jones, RWL, Pearson, MR, Robertson, NA, Jakobs, K, Kleinknecht, K, Quast, G, Renk, B, Sander, HG, Wachsmuth, H, Zeitnitz, C, Bonissent, A, Coyle, P, Leroy, O, Payre, P, Rousseau, D, Talby, M, Ragusa, F, David, A, Dietl, H, Ganis, G, Hüttmann, K, Lütjens, G, Männer, W, Moser, HG, Settles, R, Wiedenmann, W, Wolf, G, Boucrot, J, Callot, O, Davier, M, Duflot, L, Grivaz, JF, Heusse, P, Jacholkowska, A, Lefrançois, J, Veillet, JJ, Yuan, C, Bagliesi, G, Boccali, T, Foà, L, Giammanco, A, Giassi, A, Ligabue, F, Messineo, A, Palla, F, Sanguinetti, G, Sciabà, A, Spagnolo, P, Tenchini, R, Venturi, A, Verdini, PG, Xie, Z, Blair, GA, Cowan, G, Green, MG, Medcalf, T, Misiejuk, A, Strong, JA, Teixeira-Dias, P, Clifft, RW, Edgecock, TR, Norton, PR, Tomalin, IR, Bloch-Devaux, B, Colas, P, Emery, S, Kozanecki, W, Lançon, E, Lemaire, MC, Locci, E, Perez, P, Rander, J, Renardy, JF, Roussarie, A, Schuller, JP, Schwindling, J, Trabelsi, A, Vallage, B, Konstantinidis, N, Litke, AM, Taylor, G, Booth, CN, Cartwright, S, Combley, F, Lehto, M, Thompson, LF, Affholderbach, K, Böhrer, A, Brandt, S, Grupen, C, Ngac, A, Prange, G, Sieler, U, Giannini, G, Rothberg, J, Armstrong, SR, Berkelman, K, Cranmer, K, Ferguson, DPS, Gao, Y, González, S, Hayes, OJ, Hu, H, Jin, S, Kile, J, McNamara, PA, Nielsen, J, Pan, YB, von Wimmersperg-Toeller, JH, Wiedenmann, W, Wu, J, Wu, SL, Wu, X, Zobernig, G & Dissertori, G 2003, 'The ALEPH collaboration: Measurements of the strong coupling constant and the QCD colour factors using four-jet observables from hadronic Z decays', European Physical Journal C, vol. 27, no. 1, pp. 1-17.
    Heister, A. ; Schael, S. ; Barate, R. ; De Bonis, I. ; Decamp, D. ; Goy, C. ; Lees, J. P. ; Merle, E. ; Minard, M. N. ; Pietrzyk, B. ; Boix, G. ; Bravo, S. ; Casado, M. P. ; Chmeissani, M. ; Crespo, J. M. ; Fernandez, E. ; Fernandez-Bosman, M. ; Garrido, L. ; Graugés, E. ; Martinez, M. ; Merino, G. ; Miquel, R. ; Mir, L. M. ; Pacheco, A. ; Ruiz, H. ; Colaleo, A. ; Creanza, D. ; de Palma, M. ; Iaselli, G. ; Maggi, G. ; Maggi, M. ; Nuzzo, S. ; Ranieri, A. ; Raso, G. ; Ruggieri, F. ; Selvaggi, G. ; Silvestris, L. ; Tempesta, P. ; Tricomi, A. ; Zito, G. ; Huang, X. ; Lin, J. ; Ouyang, Q. ; Wang, T. ; Xie, Y. ; Xu, R. ; Xue, S. ; Zhang, J. ; Zhang, L. ; Zhao, W. ; Abbaneo, D. ; Azzurri, P. ; Buchmüller, O. ; Cattaneo, M. ; Cerutti, F. ; Clerbaux, B. ; Drevermann, H. ; Forty, R. W. ; Frank, M. ; Gianotti, F. ; Greening, T. C. ; Hansen, J. B. ; Harvey, J. ; Hutchcroft, D. E. ; Janot, P. ; Jost, B. ; Kado, M. ; Mato, P. ; Moutoussi, A. ; Ranjard, F. ; Rolandi, L. ; Schlatter, D. ; Schneider, O. ; Sguazzoni, G. ; Tejessy, W. ; Teubert, F. ; Valassi, A. ; Videau, I. ; Ward, J. ; Badaud, F. ; Falvard, A. ; Gay, P. ; Henrard, P. ; Jousset, J. ; Michel, B. ; Monteil, S. ; Montret, J. C. ; Pallin, D. ; Perret, P. ; Hansen, J. D. ; Hansen, J. R. ; Hansen, P. H. ; Nilsson, B. S. ; Kyriakis, A. ; Markou, C. ; Simopoulou, E. ; Vayaki, A. ; Zachariadou, K. ; Blondel, A. ; Bonneaud, G. ; Brient, J. C. ; Rougé, A. ; Rumpf, M. ; Swynghedauw, M. ; Verderi, M. ; Videau, H. ; Ciulli, V. ; Focardi, E. ; Parrini, G. ; Antonelli, A. ; Antonelli, M. ; Bencivenni, G. ; Bossi, F. ; Campana, P. ; Capon, G. ; Chiarella, V. ; Laurelli, P. ; Mannocchi, G. ; Murtas, F. ; Murtas, G. P. ; Passalacqua, L. ; Pepe-Altarelli, M. ; Halley, A. ; Lynch, J. G. ; Negus, P. ; O'Shea, V. ; Raine, C. ; Thompson, A. S. ; Wasserbaech, S. ; Cavanaugh, R. ; Dhamotharan, S. ; Geweniger, C. ; Hanke, P. ; Hepp, V. ; Kluge, E. E. ; Putzer, A. ; Stenzel, H. ; Tittel, K. ; Wunsch, M. ; Beuselinck, R. ; Binnie, D. M. ; Cameron, W. ; Dornan, P. J. ; Girone, M. ; Marinelli, N. ; Sedgbeer, J. K. ; Thompson, J. C. ; Ghete, V. M. ; Girtler, P. ; Kneringer, E. ; Kuhn, D. ; Rudolph, G. ; Bouhova-Thacker, E. ; Bowdery, C. K. ; Finch, A. J. ; Foster, F. ; Hughes, G. ; Jones, R. W L ; Pearson, M. R. ; Robertson, N. A. ; Jakobs, K. ; Kleinknecht, K. ; Quast, G. ; Renk, B. ; Sander, H. G. ; Wachsmuth, H. ; Zeitnitz, C. ; Bonissent, A. ; Coyle, P. ; Leroy, O. ; Payre, P. ; Rousseau, D. ; Talby, M. ; Ragusa, F. ; David, A. ; Dietl, H. ; Ganis, G. ; Hüttmann, K. ; Lütjens, G. ; Männer, W. ; Moser, H. G. ; Settles, R. ; Wiedenmann, W. ; Wolf, G. ; Boucrot, J. ; Callot, O. ; Davier, M. ; Duflot, L. ; Grivaz, J. F. ; Heusse, P. ; Jacholkowska, A. ; Lefrançois, J. ; Veillet, J. J. ; Yuan, C. ; Bagliesi, G. ; Boccali, T. ; Foà, L. ; Giammanco, A. ; Giassi, A. ; Ligabue, F. ; Messineo, A. ; Palla, F. ; Sanguinetti, G. ; Sciabà, A. ; Spagnolo, P. ; Tenchini, R. ; Venturi, A. ; Verdini, P. G. ; Xie, Z. ; Blair, G. A. ; Cowan, G. ; Green, M. G. ; Medcalf, T. ; Misiejuk, A. ; Strong, J. A. ; Teixeira-Dias, P. ; Clifft, R. W. ; Edgecock, T. R. ; Norton, P. R. ; Tomalin, I. R. ; Bloch-Devaux, B. ; Colas, P. ; Emery, S. ; Kozanecki, W. ; Lançon, E. ; Lemaire, M. C. ; Locci, E. ; Perez, P. ; Rander, J. ; Renardy, J. F. ; Roussarie, A. ; Schuller, J. P. ; Schwindling, J. ; Trabelsi, A. ; Vallage, B. ; Konstantinidis, N. ; Litke, A. M. ; Taylor, G. ; Booth, C. N. ; Cartwright, S. ; Combley, F. ; Lehto, M. ; Thompson, L. F. ; Affholderbach, K. ; Böhrer, A. ; Brandt, S. ; Grupen, C. ; Ngac, A. ; Prange, G. ; Sieler, U. ; Giannini, G. ; Rothberg, J. ; Armstrong, S. R. ; Berkelman, K. ; Cranmer, K. ; Ferguson, D. P S ; Gao, Y. ; González, S. ; Hayes, O. J. ; Hu, H. ; Jin, S. ; Kile, J. ; McNamara, P. A. ; Nielsen, J. ; Pan, Y. B. ; von Wimmersperg-Toeller, J. H. ; Wiedenmann, W. ; Wu, J. ; Wu, S. L. ; Wu, X. ; Zobernig, G. ; Dissertori, G. / The ALEPH collaboration : Measurements of the strong coupling constant and the QCD colour factors using four-jet observables from hadronic Z decays. In: European Physical Journal C. 2003 ; Vol. 27, No. 1. pp. 1-17.
    @article{2581e04b3c2b471196d55615c468bb71,
    title = "The ALEPH collaboration: Measurements of the strong coupling constant and the QCD colour factors using four-jet observables from hadronic Z decays",
    abstract = "Data from e+e- annihilation into hadrons, taken with the ALEPH detector at the Z resonance, are analyzed. The four-jet rate is studied as a function of the resolution parameter and compared to next-to-leading order calculations combined with resummation of large logarithms. Angular correlations in four-jet events are measured and compared to next-to-leading order QCD predictions. With these observables two different measurements are performed. In a first analysis the strong coupling constant is measured from the four-jet rate yielding αs(MZ) = 0.1170 ± 0.0001 (stat) ± 0.0013(sys). In a second measurement the strong coupling constant and the QCD colour factors are determined simultaneously from a fit to the four-jet rate and the four-jet angular correlations, giving αs(MZ) = 0.119 ± 0.006(stat) ± 0.026(sys) CA = 2.93 ± 0.14(stat) ± 0.58(sys) CF = 1.35 ± 0.07(stat) ± 0.26(sys) in good agreement with the expectation from QCD.",
    author = "A. Heister and S. Schael and R. Barate and {De Bonis}, I. and D. Decamp and C. Goy and Lees, {J. P.} and E. Merle and Minard, {M. N.} and B. Pietrzyk and G. Boix and S. Bravo and Casado, {M. P.} and M. Chmeissani and Crespo, {J. M.} and E. Fernandez and M. Fernandez-Bosman and L. Garrido and E. Graug{\'e}s and M. Martinez and G. Merino and R. Miquel and Mir, {L. M.} and A. Pacheco and H. Ruiz and A. Colaleo and D. Creanza and {de Palma}, M. and G. Iaselli and G. Maggi and M. Maggi and S. Nuzzo and A. Ranieri and G. Raso and F. Ruggieri and G. Selvaggi and L. Silvestris and P. Tempesta and A. Tricomi and G. Zito and X. Huang and J. Lin and Q. Ouyang and T. Wang and Y. Xie and R. Xu and S. Xue and J. Zhang and L. Zhang and W. Zhao and D. Abbaneo and P. Azzurri and O. Buchm{\"u}ller and M. Cattaneo and F. Cerutti and B. Clerbaux and H. Drevermann and Forty, {R. W.} and M. Frank and F. Gianotti and Greening, {T. C.} and Hansen, {J. B.} and J. Harvey and Hutchcroft, {D. E.} and P. Janot and B. Jost and M. Kado and P. Mato and A. Moutoussi and F. Ranjard and L. Rolandi and D. Schlatter and O. Schneider and G. Sguazzoni and W. Tejessy and F. Teubert and A. Valassi and I. Videau and J. Ward and F. Badaud and A. Falvard and P. Gay and P. Henrard and J. Jousset and B. Michel and S. Monteil and Montret, {J. C.} and D. Pallin and P. Perret and Hansen, {J. D.} and Hansen, {J. R.} and Hansen, {P. H.} and Nilsson, {B. S.} and A. Kyriakis and C. Markou and E. Simopoulou and A. Vayaki and K. Zachariadou and A. Blondel and G. Bonneaud and Brient, {J. C.} and A. Roug{\'e} and M. Rumpf and M. Swynghedauw and M. Verderi and H. Videau and V. Ciulli and E. Focardi and G. Parrini and A. Antonelli and M. Antonelli and G. Bencivenni and F. Bossi and P. Campana and G. Capon and V. Chiarella and P. Laurelli and G. Mannocchi and F. Murtas and Murtas, {G. P.} and L. Passalacqua and M. Pepe-Altarelli and A. Halley and Lynch, {J. G.} and P. Negus and V. O'Shea and C. Raine and Thompson, {A. S.} and S. Wasserbaech and R. Cavanaugh and S. Dhamotharan and C. Geweniger and P. Hanke and V. Hepp and Kluge, {E. E.} and A. Putzer and H. Stenzel and K. Tittel and M. Wunsch and R. Beuselinck and Binnie, {D. M.} and W. Cameron and Dornan, {P. J.} and M. Girone and N. Marinelli and Sedgbeer, {J. K.} and Thompson, {J. C.} and Ghete, {V. M.} and P. Girtler and E. Kneringer and D. Kuhn and G. Rudolph and E. Bouhova-Thacker and Bowdery, {C. K.} and Finch, {A. J.} and F. Foster and G. Hughes and Jones, {R. W L} and Pearson, {M. R.} and Robertson, {N. A.} and K. Jakobs and K. Kleinknecht and G. Quast and B. Renk and Sander, {H. G.} and H. Wachsmuth and C. Zeitnitz and A. Bonissent and P. Coyle and O. Leroy and P. Payre and D. Rousseau and M. Talby and F. Ragusa and A. David and H. Dietl and G. Ganis and K. H{\"u}ttmann and G. L{\"u}tjens and W. M{\"a}nner and Moser, {H. G.} and R. Settles and W. Wiedenmann and G. Wolf and J. Boucrot and O. Callot and M. Davier and L. Duflot and Grivaz, {J. F.} and P. Heusse and A. Jacholkowska and J. Lefran{\cc}ois and Veillet, {J. J.} and C. Yuan and G. Bagliesi and T. Boccali and L. Fo{\`a} and A. Giammanco and A. Giassi and F. Ligabue and A. Messineo and F. Palla and G. Sanguinetti and A. Sciab{\`a} and P. Spagnolo and R. Tenchini and A. Venturi and Verdini, {P. G.} and Z. Xie and Blair, {G. A.} and G. Cowan and Green, {M. G.} and T. Medcalf and A. Misiejuk and Strong, {J. A.} and P. Teixeira-Dias and Clifft, {R. W.} and Edgecock, {T. R.} and Norton, {P. R.} and Tomalin, {I. R.} and B. Bloch-Devaux and P. Colas and S. Emery and W. Kozanecki and E. Lan{\cc}on and Lemaire, {M. C.} and E. Locci and P. Perez and J. Rander and Renardy, {J. F.} and A. Roussarie and Schuller, {J. P.} and J. Schwindling and A. Trabelsi and B. Vallage and N. Konstantinidis and Litke, {A. M.} and G. Taylor and Booth, {C. N.} and S. Cartwright and F. Combley and M. Lehto and Thompson, {L. F.} and K. Affholderbach and A. B{\"o}hrer and S. Brandt and C. Grupen and A. Ngac and G. Prange and U. Sieler and G. Giannini and J. Rothberg and Armstrong, {S. R.} and K. Berkelman and K. Cranmer and Ferguson, {D. P S} and Y. Gao and S. Gonz{\'a}lez and Hayes, {O. J.} and H. Hu and S. Jin and J. Kile and McNamara, {P. A.} and J. Nielsen and Pan, {Y. B.} and {von Wimmersperg-Toeller}, {J. H.} and W. Wiedenmann and J. Wu and Wu, {S. L.} and X. Wu and G. Zobernig and G. Dissertori",
    year = "2003",
    month = "3",
    language = "English (US)",
    volume = "27",
    pages = "1--17",
    journal = "European Physical Journal C",
    issn = "1434-6044",
    publisher = "Springer New York",
    number = "1",

    }

    TY - JOUR

    T1 - The ALEPH collaboration

    T2 - Measurements of the strong coupling constant and the QCD colour factors using four-jet observables from hadronic Z decays

    AU - Heister, A.

    AU - Schael, S.

    AU - Barate, R.

    AU - De Bonis, I.

    AU - Decamp, D.

    AU - Goy, C.

    AU - Lees, J. P.

    AU - Merle, E.

    AU - Minard, M. N.

    AU - Pietrzyk, B.

    AU - Boix, G.

    AU - Bravo, S.

    AU - Casado, M. P.

    AU - Chmeissani, M.

    AU - Crespo, J. M.

    AU - Fernandez, E.

    AU - Fernandez-Bosman, M.

    AU - Garrido, L.

    AU - Graugés, E.

    AU - Martinez, M.

    AU - Merino, G.

    AU - Miquel, R.

    AU - Mir, L. M.

    AU - Pacheco, A.

    AU - Ruiz, H.

    AU - Colaleo, A.

    AU - Creanza, D.

    AU - de Palma, M.

    AU - Iaselli, G.

    AU - Maggi, G.

    AU - Maggi, M.

    AU - Nuzzo, S.

    AU - Ranieri, A.

    AU - Raso, G.

    AU - Ruggieri, F.

    AU - Selvaggi, G.

    AU - Silvestris, L.

    AU - Tempesta, P.

    AU - Tricomi, A.

    AU - Zito, G.

    AU - Huang, X.

    AU - Lin, J.

    AU - Ouyang, Q.

    AU - Wang, T.

    AU - Xie, Y.

    AU - Xu, R.

    AU - Xue, S.

    AU - Zhang, J.

    AU - Zhang, L.

    AU - Zhao, W.

    AU - Abbaneo, D.

    AU - Azzurri, P.

    AU - Buchmüller, O.

    AU - Cattaneo, M.

    AU - Cerutti, F.

    AU - Clerbaux, B.

    AU - Drevermann, H.

    AU - Forty, R. W.

    AU - Frank, M.

    AU - Gianotti, F.

    AU - Greening, T. C.

    AU - Hansen, J. B.

    AU - Harvey, J.

    AU - Hutchcroft, D. E.

    AU - Janot, P.

    AU - Jost, B.

    AU - Kado, M.

    AU - Mato, P.

    AU - Moutoussi, A.

    AU - Ranjard, F.

    AU - Rolandi, L.

    AU - Schlatter, D.

    AU - Schneider, O.

    AU - Sguazzoni, G.

    AU - Tejessy, W.

    AU - Teubert, F.

    AU - Valassi, A.

    AU - Videau, I.

    AU - Ward, J.

    AU - Badaud, F.

    AU - Falvard, A.

    AU - Gay, P.

    AU - Henrard, P.

    AU - Jousset, J.

    AU - Michel, B.

    AU - Monteil, S.

    AU - Montret, J. C.

    AU - Pallin, D.

    AU - Perret, P.

    AU - Hansen, J. D.

    AU - Hansen, J. R.

    AU - Hansen, P. H.

    AU - Nilsson, B. S.

    AU - Kyriakis, A.

    AU - Markou, C.

    AU - Simopoulou, E.

    AU - Vayaki, A.

    AU - Zachariadou, K.

    AU - Blondel, A.

    AU - Bonneaud, G.

    AU - Brient, J. C.

    AU - Rougé, A.

    AU - Rumpf, M.

    AU - Swynghedauw, M.

    AU - Verderi, M.

    AU - Videau, H.

    AU - Ciulli, V.

    AU - Focardi, E.

    AU - Parrini, G.

    AU - Antonelli, A.

    AU - Antonelli, M.

    AU - Bencivenni, G.

    AU - Bossi, F.

    AU - Campana, P.

    AU - Capon, G.

    AU - Chiarella, V.

    AU - Laurelli, P.

    AU - Mannocchi, G.

    AU - Murtas, F.

    AU - Murtas, G. P.

    AU - Passalacqua, L.

    AU - Pepe-Altarelli, M.

    AU - Halley, A.

    AU - Lynch, J. G.

    AU - Negus, P.

    AU - O'Shea, V.

    AU - Raine, C.

    AU - Thompson, A. S.

    AU - Wasserbaech, S.

    AU - Cavanaugh, R.

    AU - Dhamotharan, S.

    AU - Geweniger, C.

    AU - Hanke, P.

    AU - Hepp, V.

    AU - Kluge, E. E.

    AU - Putzer, A.

    AU - Stenzel, H.

    AU - Tittel, K.

    AU - Wunsch, M.

    AU - Beuselinck, R.

    AU - Binnie, D. M.

    AU - Cameron, W.

    AU - Dornan, P. J.

    AU - Girone, M.

    AU - Marinelli, N.

    AU - Sedgbeer, J. K.

    AU - Thompson, J. C.

    AU - Ghete, V. M.

    AU - Girtler, P.

    AU - Kneringer, E.

    AU - Kuhn, D.

    AU - Rudolph, G.

    AU - Bouhova-Thacker, E.

    AU - Bowdery, C. K.

    AU - Finch, A. J.

    AU - Foster, F.

    AU - Hughes, G.

    AU - Jones, R. W L

    AU - Pearson, M. R.

    AU - Robertson, N. A.

    AU - Jakobs, K.

    AU - Kleinknecht, K.

    AU - Quast, G.

    AU - Renk, B.

    AU - Sander, H. G.

    AU - Wachsmuth, H.

    AU - Zeitnitz, C.

    AU - Bonissent, A.

    AU - Coyle, P.

    AU - Leroy, O.

    AU - Payre, P.

    AU - Rousseau, D.

    AU - Talby, M.

    AU - Ragusa, F.

    AU - David, A.

    AU - Dietl, H.

    AU - Ganis, G.

    AU - Hüttmann, K.

    AU - Lütjens, G.

    AU - Männer, W.

    AU - Moser, H. G.

    AU - Settles, R.

    AU - Wiedenmann, W.

    AU - Wolf, G.

    AU - Boucrot, J.

    AU - Callot, O.

    AU - Davier, M.

    AU - Duflot, L.

    AU - Grivaz, J. F.

    AU - Heusse, P.

    AU - Jacholkowska, A.

    AU - Lefrançois, J.

    AU - Veillet, J. J.

    AU - Yuan, C.

    AU - Bagliesi, G.

    AU - Boccali, T.

    AU - Foà, L.

    AU - Giammanco, A.

    AU - Giassi, A.

    AU - Ligabue, F.

    AU - Messineo, A.

    AU - Palla, F.

    AU - Sanguinetti, G.

    AU - Sciabà, A.

    AU - Spagnolo, P.

    AU - Tenchini, R.

    AU - Venturi, A.

    AU - Verdini, P. G.

    AU - Xie, Z.

    AU - Blair, G. A.

    AU - Cowan, G.

    AU - Green, M. G.

    AU - Medcalf, T.

    AU - Misiejuk, A.

    AU - Strong, J. A.

    AU - Teixeira-Dias, P.

    AU - Clifft, R. W.

    AU - Edgecock, T. R.

    AU - Norton, P. R.

    AU - Tomalin, I. R.

    AU - Bloch-Devaux, B.

    AU - Colas, P.

    AU - Emery, S.

    AU - Kozanecki, W.

    AU - Lançon, E.

    AU - Lemaire, M. C.

    AU - Locci, E.

    AU - Perez, P.

    AU - Rander, J.

    AU - Renardy, J. F.

    AU - Roussarie, A.

    AU - Schuller, J. P.

    AU - Schwindling, J.

    AU - Trabelsi, A.

    AU - Vallage, B.

    AU - Konstantinidis, N.

    AU - Litke, A. M.

    AU - Taylor, G.

    AU - Booth, C. N.

    AU - Cartwright, S.

    AU - Combley, F.

    AU - Lehto, M.

    AU - Thompson, L. F.

    AU - Affholderbach, K.

    AU - Böhrer, A.

    AU - Brandt, S.

    AU - Grupen, C.

    AU - Ngac, A.

    AU - Prange, G.

    AU - Sieler, U.

    AU - Giannini, G.

    AU - Rothberg, J.

    AU - Armstrong, S. R.

    AU - Berkelman, K.

    AU - Cranmer, K.

    AU - Ferguson, D. P S

    AU - Gao, Y.

    AU - González, S.

    AU - Hayes, O. J.

    AU - Hu, H.

    AU - Jin, S.

    AU - Kile, J.

    AU - McNamara, P. A.

    AU - Nielsen, J.

    AU - Pan, Y. B.

    AU - von Wimmersperg-Toeller, J. H.

    AU - Wiedenmann, W.

    AU - Wu, J.

    AU - Wu, S. L.

    AU - Wu, X.

    AU - Zobernig, G.

    AU - Dissertori, G.

    PY - 2003/3

    Y1 - 2003/3

    N2 - Data from e+e- annihilation into hadrons, taken with the ALEPH detector at the Z resonance, are analyzed. The four-jet rate is studied as a function of the resolution parameter and compared to next-to-leading order calculations combined with resummation of large logarithms. Angular correlations in four-jet events are measured and compared to next-to-leading order QCD predictions. With these observables two different measurements are performed. In a first analysis the strong coupling constant is measured from the four-jet rate yielding αs(MZ) = 0.1170 ± 0.0001 (stat) ± 0.0013(sys). In a second measurement the strong coupling constant and the QCD colour factors are determined simultaneously from a fit to the four-jet rate and the four-jet angular correlations, giving αs(MZ) = 0.119 ± 0.006(stat) ± 0.026(sys) CA = 2.93 ± 0.14(stat) ± 0.58(sys) CF = 1.35 ± 0.07(stat) ± 0.26(sys) in good agreement with the expectation from QCD.

    AB - Data from e+e- annihilation into hadrons, taken with the ALEPH detector at the Z resonance, are analyzed. The four-jet rate is studied as a function of the resolution parameter and compared to next-to-leading order calculations combined with resummation of large logarithms. Angular correlations in four-jet events are measured and compared to next-to-leading order QCD predictions. With these observables two different measurements are performed. In a first analysis the strong coupling constant is measured from the four-jet rate yielding αs(MZ) = 0.1170 ± 0.0001 (stat) ± 0.0013(sys). In a second measurement the strong coupling constant and the QCD colour factors are determined simultaneously from a fit to the four-jet rate and the four-jet angular correlations, giving αs(MZ) = 0.119 ± 0.006(stat) ± 0.026(sys) CA = 2.93 ± 0.14(stat) ± 0.58(sys) CF = 1.35 ± 0.07(stat) ± 0.26(sys) in good agreement with the expectation from QCD.

    UR - http://www.scopus.com/inward/record.url?scp=0037353216&partnerID=8YFLogxK

    UR - http://www.scopus.com/inward/citedby.url?scp=0037353216&partnerID=8YFLogxK

    M3 - Article

    VL - 27

    SP - 1

    EP - 17

    JO - European Physical Journal C

    JF - European Physical Journal C

    SN - 1434-6044

    IS - 1

    ER -