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; 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

doi:10.1140/epjc/s2002-01114-2

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. MartinezG. 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 journal › Article › peer-review

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 α_s(M_Z) = 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 α_s(M_Z) = 0.119 ± 0.006(stat) ± 0.026(sys) C_A = 2.93 ± 0.14(stat) ± 0.58(sys) C_F = 1.35 ± 0.07(stat) ± 0.26(sys) in good agreement with the expectation from QCD.

Original language	English (US)
Pages (from-to)	1-17
Number of pages	17
Journal	European Physical Journal C
Volume	27
Issue number	1
DOIs	https://doi.org/10.1140/epjc/s2002-01114-2
State	Published - Mar 2003

ASJC Scopus subject areas

Engineering (miscellaneous)
Physics and Astronomy (miscellaneous)

Access to Document

10.1140/epjc/s2002-01114-2

Cite this

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., ... 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. https://doi.org/10.1140/epjc/s2002-01114-2

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. https://doi.org/10.1140/epjc/s2002-01114-2

@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{\c c}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{\c c}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 = mar,

doi = "10.1140/epjc/s2002-01114-2",

language = "English (US)",

volume = "27",

pages = "1--17",

journal = "European Physical Journal C",

issn = "1434-6044",

publisher = "Springer Nature",

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

U2 - 10.1140/epjc/s2002-01114-2

DO - 10.1140/epjc/s2002-01114-2

M3 - Article

AN - SCOPUS:0037353216

SN - 1434-6044

VL - 27

SP - 1

EP - 17

JO - European Physical Journal C

JF - European Physical Journal C

IS - 1

ER -

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

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