Measurement of the strong coupling constant αs from global event-shape variables of hadronic Z decays

D. Decampo; B. Deschizeaux; C. Goy; J. P. Lees; M. N. Minard; R. Alemany; J. M. Crespo; M. Delfino; E. Fernandez; V. Gaitan; Ll Garrido; P. Mato; R. Miquel; Ll M. Mir; S. Orteu; A. Pacheco; J. A. Perlas; E. Tubau; M. G. Catanesi; D. Creanza; M. de Palma; A. Farilla; G. Iaselli; G. Maggi; M. Maggi; S. Natali; S. Nuzzo; M. Quattromini; A. Ranieri; G. Raso; F. Romano; F. Ruggieri; G. Selvaggi; L. Silvestris; P. Tempesta; G. Zito; Y. Gao; H. Hu; D. Huang; X. Huang; J. Lin; J. Lou; C. Qiao; T. Ruan; T. Wang; Y. Xie; D. Xu; R. Xu; J. Zhang; W. Zhao; H. Albrecht; W. B. Atwood; F. Bird; E. Blucher; G. Bonvicini; F. Bossi; D. Brown; T. H. Burnett; H. Drevermann; F. Dydak; R. W. Forty; C. Grab; R. Hagelberg; S. Haywood; B. Jost; M. Kasemann; G. Kellner; J. Knobloch; A. Lacourt; I. Lehraus; T. Lohse; D. Lüke; A. Marchioro; M. Martinez; J. May; S. Menary; A. Minten; A. Miotto; J. Nash; P. Palazzi; F. Ranjard; G. Redlinger; A. Roth; J. Rothberg; H. Rotscheidt; W. von Rüden; R. St.Denis; D. Schlatter; M. Takashima; M. Talby; W. Tejessy; H. Wachsmuth; S. Wasserbaech; S. Wheeler; W. Wiedenmann; W. Witzeling; J. Wotschack; Z. Ajaltouni; M. Bardadin-Otwinowska; A. Falvard

doi:10.1016/0370-2693(91)90278-X

Measurement of the strong coupling constant α_s from global event-shape variables of hadronic Z decays

D. Decampo, B. Deschizeaux, C. Goy, J. P. Lees, M. N. Minard, R. Alemany, J. M. Crespo, M. Delfino, E. Fernandez, V. Gaitan, Ll Garrido, P. Mato, R. Miquel, Ll M. Mir, S. Orteu, A. Pacheco, J. A. Perlas, E. Tubau, M. G. Catanesi, D. CreanzaM. de Palma, A. Farilla, G. Iaselli, G. Maggi, M. Maggi, S. Natali, S. Nuzzo, M. Quattromini, A. Ranieri, G. Raso, F. Romano, F. Ruggieri, G. Selvaggi, L. Silvestris, P. Tempesta, G. Zito, Y. Gao, H. Hu, D. Huang, X. Huang, J. Lin, J. Lou, C. Qiao, T. Ruan, T. Wang, Y. Xie, D. Xu, R. Xu, J. Zhang, W. Zhao, H. Albrecht, W. B. Atwood, F. Bird, E. Blucher, G. Bonvicini, F. Bossi, D. Brown, T. H. Burnett, H. Drevermann, F. Dydak, R. W. Forty, C. Grab, R. Hagelberg, S. Haywood, B. Jost, M. Kasemann, G. Kellner, J. Knobloch, A. Lacourt, I. Lehraus, T. Lohse, D. Lüke, A. Marchioro, M. Martinez, J. May, S. Menary, A. Minten, A. Miotto, J. Nash, P. Palazzi, F. Ranjard, G. Redlinger, A. Roth, J. Rothberg, H. Rotscheidt, W. von Rüden, R. St.Denis, D. Schlatter, M. Takashima, M. Talby, W. Tejessy, H. Wachsmuth, S. Wasserbaech, S. Wheeler, W. Wiedenmann, W. Witzeling, J. Wotschack, Z. Ajaltouni, M. Bardadin-Otwinowska, A. Falvard

Department of Physics

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Abstract

An analysis of global event-shape variables has been carried out for the reaction e+e-→Z0→hadrons to measure the strong coupling constant αs. This study is based on 52 720 hadronic events obtained in 1989/90 with the ALEPH detector at the LEP collider at energies near the peak of the Z-resonance. In order to determine αs, second order QCD predictions modified by effects of perturbative higher orders and hadronization were fitted to the experimental distributions of event-shape variables. From a detailed analysis of the theoretical uncertainties we find that this approach is best justified for the differential two-jet rate, from which we obtain αs(MZ2) = 0.121 ± 0.002(stat.)±0.003(sys.)±0.007(theor.) using a renormalization scale ω = 1 2MZ. The dependence of αs(MZ2) on ω is parameterized. For scales mb<ω<MZ the result varies by -0.012+0.007. © 1991.

Original language	English
Pages (from-to)	623-633
Journal	Physics Letters B
Volume	255
Issue number	4
DOIs	https://doi.org/10.1016/0370-2693(91)90278-X
Publication status	Published - 21 Feb 1991

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10.1016/0370-2693(91)90278-X

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Decampo, D., Deschizeaux, B., Goy, C., Lees, J. P., Minard, M. N., Alemany, R., Crespo, J. M., Delfino, M., Fernandez, E., Gaitan, V., Garrido, L., Mato, P., Miquel, R., Mir, L. M., Orteu, S., Pacheco, A., Perlas, J. A., Tubau, E., Catanesi, M. G., ... Falvard, A. (1991). Measurement of the strong coupling constant α_s from global event-shape variables of hadronic Z decays. Physics Letters B, 255(4), 623-633. https://doi.org/10.1016/0370-2693(91)90278-X

@article{61c52a81cbb5419e97ad8e21e1c9ae45,

title = "Measurement of the strong coupling constant αs from global event-shape variables of hadronic Z decays",

abstract = "An analysis of global event-shape variables has been carried out for the reaction e+e-→Z0→hadrons to measure the strong coupling constant αs. This study is based on 52 720 hadronic events obtained in 1989/90 with the ALEPH detector at the LEP collider at energies near the peak of the Z-resonance. In order to determine αs, second order QCD predictions modified by effects of perturbative higher orders and hadronization were fitted to the experimental distributions of event-shape variables. From a detailed analysis of the theoretical uncertainties we find that this approach is best justified for the differential two-jet rate, from which we obtain αs(MZ2) = 0.121 ± 0.002(stat.)±0.003(sys.)±0.007(theor.) using a renormalization scale ω = 1 2MZ. The dependence of αs(MZ2) on ω is parameterized. For scales mb<ω<MZ the result varies by -0.012+0.007. {\textcopyright} 1991.",

author = "D. Decampo and B. Deschizeaux and C. Goy and Lees, {J. P.} and Minard, {M. N.} and R. Alemany and Crespo, {J. M.} and M. Delfino and E. Fernandez and V. Gaitan and Ll Garrido and P. Mato and R. Miquel and Mir, {Ll M.} and S. Orteu and A. Pacheco and Perlas, {J. A.} and E. Tubau and Catanesi, {M. G.} and D. Creanza and {de Palma}, M. and A. Farilla and G. Iaselli and G. Maggi and M. Maggi and S. Natali and S. Nuzzo and M. Quattromini and A. Ranieri and G. Raso and F. Romano and F. Ruggieri and G. Selvaggi and L. Silvestris and P. Tempesta and G. Zito and Y. Gao and H. Hu and D. Huang and X. Huang and J. Lin and J. Lou and C. Qiao and T. Ruan and T. Wang and Y. Xie and D. Xu and R. Xu and J. Zhang and W. Zhao and H. Albrecht and Atwood, {W. B.} and F. Bird and E. Blucher and G. Bonvicini and F. Bossi and D. Brown and Burnett, {T. H.} and H. Drevermann and F. Dydak and Forty, {R. W.} and C. Grab and R. Hagelberg and S. Haywood and B. Jost and M. Kasemann and G. Kellner and J. Knobloch and A. Lacourt and I. Lehraus and T. Lohse and D. L{\"u}ke and A. Marchioro and M. Martinez and J. May and S. Menary and A. Minten and A. Miotto and J. Nash and P. Palazzi and F. Ranjard and G. Redlinger and A. Roth and J. Rothberg and H. Rotscheidt and {von R{\"u}den}, W. and R. St.Denis and D. Schlatter and M. Takashima and M. Talby and W. Tejessy and H. Wachsmuth and S. Wasserbaech and S. Wheeler and W. Wiedenmann and W. Witzeling and J. Wotschack and Z. Ajaltouni and M. Bardadin-Otwinowska and A. Falvard",

year = "1991",

month = feb,

day = "21",

doi = "10.1016/0370-2693(91)90278-X",

language = "English",

volume = "255",

pages = "623--633",

journal = "Physics Letters B",

issn = "0370-2693",

publisher = "Elsevier",

number = "4",

}

Decampo, D, Deschizeaux, B, Goy, C, Lees, JP, Minard, MN, Alemany, R, Crespo, JM , Delfino, M , Fernandez, E, Gaitan, V, Garrido, L, Mato, P, Miquel, R, Mir, LM, Orteu, S, Pacheco, A, Perlas, JA, Tubau, E, Catanesi, MG, Creanza, D, de Palma, M, Farilla, A, Iaselli, G, Maggi, G, Maggi, M, Natali, S, Nuzzo, S, Quattromini, M, Ranieri, A, Raso, G, Romano, F, Ruggieri, F, Selvaggi, G, Silvestris, L, Tempesta, P, Zito, G, Gao, Y, Hu, H, Huang, D, Huang, X, Lin, J, Lou, J, Qiao, C, Ruan, T, Wang, T, Xie, Y, Xu, D, Xu, R, Zhang, J, Zhao, W, Albrecht, H, Atwood, WB, Bird, F, Blucher, E, Bonvicini, G, Bossi, F, Brown, D, Burnett, TH, Drevermann, H, Dydak, F, Forty, RW, Grab, C, Hagelberg, R, Haywood, S, Jost, B, Kasemann, M, Kellner, G, Knobloch, J, Lacourt, A, Lehraus, I, Lohse, T, Lüke, D, Marchioro, A, Martinez, M, May, J, Menary, S, Minten, A, Miotto, A, Nash, J, Palazzi, P, Ranjard, F, Redlinger, G, Roth, A, Rothberg, J, Rotscheidt, H, von Rüden, W, St.Denis, R, Schlatter, D, Takashima, M, Talby, M, Tejessy, W, Wachsmuth, H, Wasserbaech, S, Wheeler, S, Wiedenmann, W, Witzeling, W, Wotschack, J, Ajaltouni, Z, Bardadin-Otwinowska, M & Falvard, A 1991, 'Measurement of the strong coupling constant α_s from global event-shape variables of hadronic Z decays', Physics Letters B, vol. 255, no. 4, pp. 623-633. https://doi.org/10.1016/0370-2693(91)90278-X

TY - JOUR

T1 - Measurement of the strong coupling constant αs from global event-shape variables of hadronic Z decays

AU - Decampo, D.

AU - Deschizeaux, B.

AU - Goy, C.

AU - Lees, J. P.

AU - Minard, M. N.

AU - Alemany, R.

AU - Crespo, J. M.

AU - Delfino, M.

AU - Fernandez, E.

AU - Gaitan, V.

AU - Garrido, Ll

AU - Mato, P.

AU - Miquel, R.

AU - Mir, Ll M.

AU - Orteu, S.

AU - Pacheco, A.

AU - Perlas, J. A.

AU - Tubau, E.

AU - Catanesi, M. G.

AU - Creanza, D.

AU - de Palma, M.

AU - Farilla, A.

AU - Iaselli, G.

AU - Maggi, G.

AU - Maggi, M.

AU - Natali, S.

AU - Nuzzo, S.

AU - Quattromini, M.

AU - Ranieri, A.

AU - Raso, G.

AU - Romano, F.

AU - Ruggieri, F.

AU - Selvaggi, G.

AU - Silvestris, L.

AU - Tempesta, P.

AU - Zito, G.

AU - Gao, Y.

AU - Hu, H.

AU - Huang, D.

AU - Huang, X.

AU - Lin, J.

AU - Lou, J.

AU - Qiao, C.

AU - Ruan, T.

AU - Wang, T.

AU - Xie, Y.

AU - Xu, D.

AU - Xu, R.

AU - Zhang, J.

AU - Zhao, W.

AU - Albrecht, H.

AU - Atwood, W. B.

AU - Bird, F.

AU - Blucher, E.

AU - Bonvicini, G.

AU - Bossi, F.

AU - Brown, D.

AU - Burnett, T. H.

AU - Drevermann, H.

AU - Dydak, F.

AU - Forty, R. W.

AU - Grab, C.

AU - Hagelberg, R.

AU - Haywood, S.

AU - Jost, B.

AU - Kasemann, M.

AU - Kellner, G.

AU - Knobloch, J.

AU - Lacourt, A.

AU - Lehraus, I.

AU - Lohse, T.

AU - Lüke, D.

AU - Marchioro, A.

AU - Martinez, M.

AU - May, J.

AU - Menary, S.

AU - Minten, A.

AU - Miotto, A.

AU - Nash, J.

AU - Palazzi, P.

AU - Ranjard, F.

AU - Redlinger, G.

AU - Roth, A.

AU - Rothberg, J.

AU - Rotscheidt, H.

AU - von Rüden, W.

AU - St.Denis, R.

AU - Schlatter, D.

AU - Takashima, M.

AU - Talby, M.

AU - Tejessy, W.

AU - Wachsmuth, H.

AU - Wasserbaech, S.

AU - Wheeler, S.

AU - Wiedenmann, W.

AU - Witzeling, W.

AU - Wotschack, J.

AU - Ajaltouni, Z.

AU - Bardadin-Otwinowska, M.

AU - Falvard, A.

PY - 1991/2/21

Y1 - 1991/2/21

N2 - An analysis of global event-shape variables has been carried out for the reaction e+e-→Z0→hadrons to measure the strong coupling constant αs. This study is based on 52 720 hadronic events obtained in 1989/90 with the ALEPH detector at the LEP collider at energies near the peak of the Z-resonance. In order to determine αs, second order QCD predictions modified by effects of perturbative higher orders and hadronization were fitted to the experimental distributions of event-shape variables. From a detailed analysis of the theoretical uncertainties we find that this approach is best justified for the differential two-jet rate, from which we obtain αs(MZ2) = 0.121 ± 0.002(stat.)±0.003(sys.)±0.007(theor.) using a renormalization scale ω = 1 2MZ. The dependence of αs(MZ2) on ω is parameterized. For scales mb<ω<MZ the result varies by -0.012+0.007. © 1991.

AB - An analysis of global event-shape variables has been carried out for the reaction e+e-→Z0→hadrons to measure the strong coupling constant αs. This study is based on 52 720 hadronic events obtained in 1989/90 with the ALEPH detector at the LEP collider at energies near the peak of the Z-resonance. In order to determine αs, second order QCD predictions modified by effects of perturbative higher orders and hadronization were fitted to the experimental distributions of event-shape variables. From a detailed analysis of the theoretical uncertainties we find that this approach is best justified for the differential two-jet rate, from which we obtain αs(MZ2) = 0.121 ± 0.002(stat.)±0.003(sys.)±0.007(theor.) using a renormalization scale ω = 1 2MZ. The dependence of αs(MZ2) on ω is parameterized. For scales mb<ω<MZ the result varies by -0.012+0.007. © 1991.

U2 - 10.1016/0370-2693(91)90278-X

DO - 10.1016/0370-2693(91)90278-X

M3 - Article

SN - 0370-2693

VL - 255

SP - 623

EP - 633

JO - Physics Letters B

JF - Physics Letters B

IS - 4

ER -

Measurement of the strong coupling constant αs from global event-shape variables of hadronic Z decays

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Measurement of the strong coupling constant α_s from global event-shape variables of hadronic Z decays