Measurement of αs with radiative hadronic events

G. Abbiendi, C. Ainsley, P. F. Åkesson, G. Alexander, G. Anagnostou, K. J. Anderson, S. Asai, D. Axen, I. Bailey, E. Barberio, T. Barillari, R. J. Barlow, R. J. Batley, P. Bechtle, T. Behnke, K. W. Bell, P. J. Bell, G. Bella, A. Bellerive, G. Benelli & 189 others S. Bethke, O. Biebel, O. Boeriu, P. Bock, M. Boutemeur, S. Braibant, R. M. Brown, H. J. Burckhart, S. Campana, P. Capiluppi, R. K. Carnegie, A. A. Carter, J. R. Carter, C. Y. Chang, D. G. Charlton, C. Ciocca, A. Csilling, M. Cuffiani, S. Dado, M. Dallavalle, A. De Roeck, E. A. De Wolf, K. Desch, B. Dienes, J. Dubbert, E. Duchovni, G. Duckeck, I. P. Duerdoth, E. Etzion, F. Fabbri, P. Ferrari, F. Fiedler, I. Fleck, M. Ford, A. Frey, P. Gagnon, J. W. Gary, C. Geich-Gimbel, G. Giacomelli, P. Giacomelli, M. Giunta, J. Goldberg, E. Gross, J. Grunhaus, M. Gruwé, A. Gupta, C. Hajdú, M. Hamann, G. G. Hanson, A. Harel, M. Hauschild, C. M. Hawkes, R. Hawkings, G. Herten, R. D. Heuer, J. C. Hill, D. Horváth, P. Igo-Kemenes, K. Ishii, H. Jeremie, P. Jovanovic, T. R. Junk, J. Kanzaki, D. Karlen, K. Kawagoe, T. Kawamoto, R. K. Keeler, R. G. Kellogg, B. W. Kennedy, S. Kluth, T. Kobayashi, M. Kobel, S. Komamiya, T. Krämer, A. Krasznahorkay, P. Krieger, J. Von Krogh, T. Kuhl, M. Kupper, G. D. Lafferty, H. Landsman, D. Lanske, D. Lellouch, J. Letts, L. Levinson, J. Lillich, S. L. Lloyd, F. K. Loebinger, J. Lu, A. Ludwig, J. Ludwig, W. Mader, S. Marcellini, A. J. Martin, T. Mashimo, P. Mättig, J. McKenna, R. A. McPherson, F. Meijers, W. Menges, F. S. Merritt, H. Mes, N. Meyer, A. Michelini, S. Mihara, G. Mikenberg, D. J. Miller, W. Mohr, T. Mori, A. Mutter, K. Nagai, I. Nakamura, H. Nanjo, H. A. Neal, S. W. O'Neale, A. Oh, M. J. Oreglia, S. Orito, C. Pahl, G. Pásztor, J. R. Pater, J. E. Pilcher, J. Pinfold, D. E. Plane, O. Pooth, M. Przybycień, A. Quadt, K. Rabbertz, C. Rembser, P. Renkel, J. M. Roney, A. M. Rossi, Y. Rozen, K. Runge, K. Sachs, T. Saeki, E. K G Sarkisyan, A. D. Schaile, O. Schaile, P. Scharff-Hansen, J. Schieck, T. Schörner-Sadenius, M. Schröder, M. Schumacher, R. Seuster, T. G. Shears, B. C. Shen, P. Sherwood, A. Skuja, A. M. Smith, R. Sobie, S. Söldner-Rembold, F. Spano, A. Stahl, D. Strom, R. Ströhmer, S. Tarem, M. Tasevsky, R. Teuscher, M. A. Thomson, E. Torrence, D. Toya, I. Trigger, Z. Trócsányi, E. Tsur, M. F. Turner-Watson, I. Ueda, B. Újvári, C. F. Vollmer, P. Vannerem, R. Vértesi, M. Verzocchi, H. Voss, J. Vossebeld, C. P. Ward, D. R. Ward, P. M. Watkins, A. T. Watson, N. K. Watson, P. S. Wells, T. Wengler, N. Wermes, G. W. Wilson, J. A. Wilson, G. Wolf, T. R. Wyatt, S. Yamashita, D. Zer-Zion, L. Zivkovic

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Hadronic final states with a hard isolated photon are studied using data taken at centre-of-mass energies around the mass of the Z boson with the OPAL detector at LEP. The strong coupling αs is extracted by comparing data and QCD predictions for event shape observables at average reduced centre-of-mass energies ranging from 24 GeV to 78 GeV, and the energy dependence of αs is studied. Our results are consistent with the running of αs as predicted by QCD and show that within the uncertainties of our analysis event shapes in hadronic Z decays with hard and isolated photon radiation can be described by QCD at reduced centre-of-mass energies. Combining all values from different event shape observables and energies gives αs(MZ)=0.1182±0.0015(stat.) ±0.0101(syst.).

Original languageEnglish
Pages (from-to)21-39
Number of pages19
JournalEuropean Physical Journal C
Volume53
Issue number1
DOIs
Publication statusPublished - Jan 2008

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center of mass
quantum chromodynamics
energy
photons
bosons
detectors
decay
radiation
predictions

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Abbiendi, G., Ainsley, C., Åkesson, P. F., Alexander, G., Anagnostou, G., Anderson, K. J., ... Zivkovic, L. (2008). Measurement of αs with radiative hadronic events. European Physical Journal C, 53(1), 21-39. https://doi.org/10.1140/epjc/s10052-007-0470-9

Measurement of αs with radiative hadronic events. / Abbiendi, G.; Ainsley, C.; Åkesson, P. F.; Alexander, G.; Anagnostou, G.; Anderson, K. J.; Asai, S.; Axen, D.; 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.; Brown, R. M.; Burckhart, H. J.; Campana, S.; Capiluppi, P.; Carnegie, R. K.; Carter, A. A.; Carter, J. R.; Chang, C. Y.; Charlton, D. G.; Ciocca, C.; Csilling, A.; Cuffiani, M.; Dado, S.; Dallavalle, M.; De Roeck, A.; De Wolf, E. A.; Desch, K.; Dienes, B.; Dubbert, J.; Duchovni, E.; Duckeck, G.; Duerdoth, I. P.; Etzion, E.; Fabbri, F.; Ferrari, P.; Fiedler, F.; Fleck, I.; Ford, M.; Frey, A.; Gagnon, P.; Gary, J. W.; Geich-Gimbel, C.; Giacomelli, G.; Giacomelli, P.; Giunta, M.; Goldberg, J.; Gross, E.; Grunhaus, J.; Gruwé, M.; Gupta, A.; Hajdú, C.; Hamann, M.; Hanson, G. G.; Harel, A.; Hauschild, M.; Hawkes, C. M.; Hawkings, R.; Herten, G.; Heuer, R. D.; Hill, J. C.; Horváth, D.; Igo-Kemenes, P.; Ishii, K.; Jeremie, H.; Jovanovic, P.; Junk, T. R.; Kanzaki, J.; Karlen, D.; Kawagoe, K.; Kawamoto, T.; Keeler, R. K.; Kellogg, R. G.; Kennedy, B. W.; Kluth, S.; Kobayashi, T.; Kobel, M.; Komamiya, S.; Krämer, T.; Krasznahorkay, A.; Krieger, P.; Von Krogh, J.; Kuhl, T.; Kupper, M.; Lafferty, G. D.; Landsman, H.; Lanske, D.; Lellouch, D.; Letts, J.; Levinson, L.; Lillich, J.; Lloyd, S. L.; Loebinger, F. K.; Lu, J.; Ludwig, A.; Ludwig, J.; Mader, W.; Marcellini, S.; Martin, A. J.; Mashimo, T.; Mättig, P.; McKenna, J.; McPherson, R. A.; Meijers, F.; Menges, W.; Merritt, F. S.; Mes, H.; Meyer, N.; Michelini, A.; Mihara, S.; Mikenberg, G.; Miller, D. J.; Mohr, W.; Mori, T.; Mutter, A.; Nagai, K.; Nakamura, I.; Nanjo, H.; Neal, H. A.; O'Neale, S. W.; Oh, A.; Oreglia, M. J.; Orito, S.; Pahl, C.; Pásztor, G.; Pater, J. R.; Pilcher, J. E.; Pinfold, J.; Plane, D. E.; Pooth, O.; Przybycień, M.; Quadt, A.; Rabbertz, K.; Rembser, C.; Renkel, P.; Roney, J. M.; Rossi, A. M.; Rozen, Y.; Runge, K.; Sachs, K.; Saeki, T.; Sarkisyan, E. K G; Schaile, A. D.; Schaile, O.; Scharff-Hansen, P.; Schieck, J.; Schörner-Sadenius, T.; Schröder, M.; Schumacher, M.; Seuster, R.; Shears, T. G.; Shen, B. C.; Sherwood, P.; Skuja, A.; Smith, A. M.; Sobie, R.; Söldner-Rembold, S.; Spano, F.; Stahl, A.; Strom, D.; Ströhmer, R.; Tarem, S.; Tasevsky, M.; Teuscher, R.; Thomson, M. A.; Torrence, E.; Toya, D.; Trigger, I.; Trócsányi, Z.; Tsur, E.; Turner-Watson, M. F.; Ueda, I.; Újvári, B.; Vollmer, C. F.; Vannerem, P.; Vértesi, R.; Verzocchi, M.; Voss, H.; Vossebeld, J.; Ward, C. P.; Ward, D. R.; Watkins, P. M.; Watson, A. T.; Watson, N. K.; Wells, P. S.; Wengler, T.; Wermes, N.; Wilson, G. W.; Wilson, J. A.; Wolf, G.; Wyatt, T. R.; Yamashita, S.; Zer-Zion, D.; Zivkovic, L.

In: European Physical Journal C, Vol. 53, No. 1, 01.2008, p. 21-39.

Research output: Contribution to journalArticle

Abbiendi, G, Ainsley, C, Åkesson, PF, Alexander, G, Anagnostou, G, Anderson, KJ, Asai, S, Axen, D, 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, Brown, RM, Burckhart, HJ, Campana, S, Capiluppi, P, Carnegie, RK, Carter, AA, Carter, JR, Chang, CY, Charlton, DG, Ciocca, C, Csilling, A, Cuffiani, M, Dado, S, Dallavalle, M, De Roeck, A, De Wolf, EA, Desch, K, Dienes, B, Dubbert, J, Duchovni, E, Duckeck, G, Duerdoth, IP, Etzion, E, Fabbri, F, Ferrari, P, Fiedler, F, Fleck, I, Ford, M, Frey, A, Gagnon, P, Gary, JW, Geich-Gimbel, C, Giacomelli, G, Giacomelli, P, Giunta, M, Goldberg, J, Gross, E, Grunhaus, J, Gruwé, M, Gupta, A, Hajdú, C, Hamann, M, Hanson, GG, Harel, A, Hauschild, M, Hawkes, CM, Hawkings, R, Herten, G, Heuer, RD, Hill, JC, Horváth, D, Igo-Kemenes, P, Ishii, K, Jeremie, H, Jovanovic, P, Junk, TR, Kanzaki, J, Karlen, D, Kawagoe, K, Kawamoto, T, Keeler, RK, Kellogg, RG, Kennedy, BW, Kluth, S, Kobayashi, T, Kobel, M, Komamiya, S, Krämer, T, Krasznahorkay, A, Krieger, P, Von Krogh, J, Kuhl, T, Kupper, M, Lafferty, GD, Landsman, H, Lanske, D, Lellouch, D, Letts, J, Levinson, L, Lillich, J, Lloyd, SL, Loebinger, FK, Lu, J, Ludwig, A, Ludwig, J, Mader, W, Marcellini, S, Martin, AJ, Mashimo, T, Mättig, P, McKenna, J, McPherson, RA, Meijers, F, Menges, W, Merritt, FS, Mes, H, Meyer, N, Michelini, A, Mihara, S, Mikenberg, G, Miller, DJ, Mohr, W, Mori, T, Mutter, A, Nagai, K, Nakamura, I, Nanjo, H, Neal, HA, O'Neale, SW, Oh, A, Oreglia, MJ, Orito, S, Pahl, C, Pásztor, G, Pater, JR, Pilcher, JE, Pinfold, J, Plane, DE, Pooth, O, Przybycień, M, Quadt, A, Rabbertz, K, Rembser, C, Renkel, P, Roney, JM, Rossi, AM, Rozen, Y, Runge, K, Sachs, K, Saeki, T, Sarkisyan, EKG, Schaile, AD, Schaile, O, Scharff-Hansen, P, Schieck, J, Schörner-Sadenius, T, Schröder, M, Schumacher, M, Seuster, R, Shears, TG, Shen, BC, Sherwood, P, Skuja, A, Smith, AM, Sobie, R, Söldner-Rembold, S, Spano, F, Stahl, A, Strom, D, Ströhmer, R, Tarem, S, Tasevsky, M, Teuscher, R, Thomson, MA, Torrence, E, Toya, D, Trigger, I, Trócsányi, Z, Tsur, E, Turner-Watson, MF, Ueda, I, Újvári, B, Vollmer, CF, Vannerem, P, Vértesi, R, Verzocchi, M, Voss, H, Vossebeld, J, Ward, CP, Ward, DR, Watkins, PM, Watson, AT, Watson, NK, Wells, PS, Wengler, T, Wermes, N, Wilson, GW, Wilson, JA, Wolf, G, Wyatt, TR, Yamashita, S, Zer-Zion, D & Zivkovic, L 2008, 'Measurement of αs with radiative hadronic events', European Physical Journal C, vol. 53, no. 1, pp. 21-39. https://doi.org/10.1140/epjc/s10052-007-0470-9
Abbiendi G, Ainsley C, Åkesson PF, Alexander G, Anagnostou G, Anderson KJ et al. Measurement of αs with radiative hadronic events. European Physical Journal C. 2008 Jan;53(1):21-39. https://doi.org/10.1140/epjc/s10052-007-0470-9
Abbiendi, G. ; Ainsley, C. ; Åkesson, P. F. ; Alexander, G. ; Anagnostou, G. ; Anderson, K. J. ; Asai, S. ; Axen, D. ; 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. ; Brown, R. M. ; Burckhart, H. J. ; Campana, S. ; Capiluppi, P. ; Carnegie, R. K. ; Carter, A. A. ; Carter, J. R. ; Chang, C. Y. ; Charlton, D. G. ; Ciocca, C. ; Csilling, A. ; Cuffiani, M. ; Dado, S. ; Dallavalle, M. ; De Roeck, A. ; De Wolf, E. A. ; Desch, K. ; Dienes, B. ; Dubbert, J. ; Duchovni, E. ; Duckeck, G. ; Duerdoth, I. P. ; Etzion, E. ; Fabbri, F. ; Ferrari, P. ; Fiedler, F. ; Fleck, I. ; Ford, M. ; Frey, A. ; Gagnon, P. ; Gary, J. W. ; Geich-Gimbel, C. ; Giacomelli, G. ; Giacomelli, P. ; Giunta, M. ; Goldberg, J. ; Gross, E. ; Grunhaus, J. ; Gruwé, M. ; Gupta, A. ; Hajdú, C. ; Hamann, M. ; Hanson, G. G. ; Harel, A. ; Hauschild, M. ; Hawkes, C. M. ; Hawkings, R. ; Herten, G. ; Heuer, R. D. ; Hill, J. C. ; Horváth, D. ; Igo-Kemenes, P. ; Ishii, K. ; Jeremie, H. ; Jovanovic, P. ; Junk, T. R. ; Kanzaki, J. ; Karlen, D. ; Kawagoe, K. ; Kawamoto, T. ; Keeler, R. K. ; Kellogg, R. G. ; Kennedy, B. W. ; Kluth, S. ; Kobayashi, T. ; Kobel, M. ; Komamiya, S. ; Krämer, T. ; Krasznahorkay, A. ; Krieger, P. ; Von Krogh, J. ; Kuhl, T. ; Kupper, M. ; Lafferty, G. D. ; Landsman, H. ; Lanske, D. ; Lellouch, D. ; Letts, J. ; Levinson, L. ; Lillich, J. ; Lloyd, S. L. ; Loebinger, F. K. ; Lu, J. ; Ludwig, A. ; Ludwig, J. ; Mader, W. ; Marcellini, S. ; Martin, A. J. ; Mashimo, T. ; Mättig, P. ; McKenna, J. ; McPherson, R. A. ; Meijers, F. ; Menges, W. ; Merritt, F. S. ; Mes, H. ; Meyer, N. ; Michelini, A. ; Mihara, S. ; Mikenberg, G. ; Miller, D. J. ; Mohr, W. ; Mori, T. ; Mutter, A. ; Nagai, K. ; Nakamura, I. ; Nanjo, H. ; Neal, H. A. ; O'Neale, S. W. ; Oh, A. ; Oreglia, M. J. ; Orito, S. ; Pahl, C. ; Pásztor, G. ; Pater, J. R. ; Pilcher, J. E. ; Pinfold, J. ; Plane, D. E. ; Pooth, O. ; Przybycień, M. ; Quadt, A. ; Rabbertz, K. ; Rembser, C. ; Renkel, P. ; Roney, J. M. ; Rossi, A. M. ; Rozen, Y. ; Runge, K. ; Sachs, K. ; Saeki, T. ; Sarkisyan, E. K G ; Schaile, A. D. ; Schaile, O. ; Scharff-Hansen, P. ; Schieck, J. ; Schörner-Sadenius, T. ; Schröder, M. ; Schumacher, M. ; Seuster, R. ; Shears, T. G. ; Shen, B. C. ; Sherwood, P. ; Skuja, A. ; Smith, A. M. ; Sobie, R. ; Söldner-Rembold, S. ; Spano, F. ; Stahl, A. ; Strom, D. ; Ströhmer, R. ; Tarem, S. ; Tasevsky, M. ; Teuscher, R. ; Thomson, M. A. ; Torrence, E. ; Toya, D. ; Trigger, I. ; Trócsányi, Z. ; Tsur, E. ; Turner-Watson, M. F. ; Ueda, I. ; Újvári, B. ; Vollmer, C. F. ; Vannerem, P. ; Vértesi, R. ; Verzocchi, M. ; Voss, H. ; Vossebeld, J. ; Ward, C. P. ; Ward, D. R. ; Watkins, P. M. ; Watson, A. T. ; Watson, N. K. ; Wells, P. S. ; Wengler, T. ; Wermes, N. ; Wilson, G. W. ; Wilson, J. A. ; Wolf, G. ; Wyatt, T. R. ; Yamashita, S. ; Zer-Zion, D. ; Zivkovic, L. / Measurement of αs with radiative hadronic events. In: European Physical Journal C. 2008 ; Vol. 53, No. 1. pp. 21-39.
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title = "Measurement of αs with radiative hadronic events",
abstract = "Hadronic final states with a hard isolated photon are studied using data taken at centre-of-mass energies around the mass of the Z boson with the OPAL detector at LEP. The strong coupling αs is extracted by comparing data and QCD predictions for event shape observables at average reduced centre-of-mass energies ranging from 24 GeV to 78 GeV, and the energy dependence of αs is studied. Our results are consistent with the running of αs as predicted by QCD and show that within the uncertainties of our analysis event shapes in hadronic Z decays with hard and isolated photon radiation can be described by QCD at reduced centre-of-mass energies. Combining all values from different event shape observables and energies gives αs(MZ)=0.1182±0.0015(stat.) ±0.0101(syst.).",
author = "G. Abbiendi and C. Ainsley and {\AA}kesson, {P. F.} and G. Alexander and G. Anagnostou and Anderson, {K. J.} and S. Asai and D. Axen and I. Bailey and E. Barberio and T. Barillari and Barlow, {R. J.} and Batley, {R. J.} and P. Bechtle and T. Behnke and Bell, {K. W.} and Bell, {P. J.} and G. Bella and A. Bellerive and G. Benelli and S. Bethke and O. Biebel and O. Boeriu and P. Bock and M. Boutemeur and S. Braibant and Brown, {R. M.} and Burckhart, {H. J.} and S. Campana and P. Capiluppi and Carnegie, {R. K.} and Carter, {A. A.} and Carter, {J. R.} and Chang, {C. Y.} and Charlton, {D. G.} and C. Ciocca and A. Csilling and M. Cuffiani and S. Dado and M. Dallavalle and {De Roeck}, A. and {De Wolf}, {E. A.} and K. Desch and B. Dienes and J. Dubbert and E. Duchovni and G. Duckeck and Duerdoth, {I. P.} and E. Etzion and F. Fabbri and P. Ferrari and F. Fiedler and I. Fleck and M. Ford and A. Frey and P. Gagnon and Gary, {J. W.} and C. Geich-Gimbel and G. Giacomelli and P. Giacomelli and M. Giunta and J. Goldberg and E. Gross and J. Grunhaus and M. Gruw{\'e} and A. Gupta and C. Hajd{\'u} and M. Hamann and Hanson, {G. G.} and A. Harel and M. Hauschild and Hawkes, {C. M.} and R. Hawkings and G. Herten and Heuer, {R. D.} and Hill, {J. C.} and D. Horv{\'a}th and P. Igo-Kemenes and K. Ishii and H. Jeremie and P. Jovanovic and Junk, {T. R.} and J. Kanzaki and D. Karlen and K. Kawagoe and T. Kawamoto and Keeler, {R. K.} and Kellogg, {R. G.} and Kennedy, {B. W.} and S. Kluth and T. Kobayashi and M. Kobel and S. Komamiya and T. Kr{\"a}mer and A. Krasznahorkay and P. Krieger and {Von Krogh}, J. and T. Kuhl and M. Kupper and Lafferty, {G. D.} and H. Landsman and D. Lanske and D. Lellouch and J. Letts and L. Levinson and J. Lillich and Lloyd, {S. L.} and Loebinger, {F. K.} and J. Lu and A. Ludwig and J. Ludwig and W. Mader and S. Marcellini and Martin, {A. J.} and T. Mashimo and P. M{\"a}ttig and J. McKenna and McPherson, {R. A.} and F. Meijers and W. Menges and Merritt, {F. S.} and H. Mes and N. Meyer and A. Michelini and S. Mihara and G. Mikenberg and Miller, {D. J.} and W. Mohr and T. Mori and A. Mutter and K. Nagai and I. Nakamura and H. Nanjo and Neal, {H. A.} and O'Neale, {S. W.} and A. Oh and Oreglia, {M. J.} and S. Orito and C. Pahl and G. P{\'a}sztor and Pater, {J. R.} and Pilcher, {J. E.} and J. Pinfold and Plane, {D. E.} and O. Pooth and M. Przybycień and A. Quadt and K. Rabbertz and C. Rembser and P. Renkel and Roney, {J. M.} and Rossi, {A. M.} and Y. Rozen and K. Runge and K. Sachs and T. Saeki and Sarkisyan, {E. K G} and Schaile, {A. D.} and O. Schaile and P. Scharff-Hansen and J. Schieck and T. Sch{\"o}rner-Sadenius and M. Schr{\"o}der and M. Schumacher and R. Seuster and Shears, {T. G.} and Shen, {B. C.} and P. Sherwood and A. Skuja and Smith, {A. M.} and R. Sobie and S. S{\"o}ldner-Rembold and F. Spano and A. Stahl and D. Strom and R. Str{\"o}hmer and S. Tarem and M. Tasevsky and R. Teuscher and Thomson, {M. A.} and E. Torrence and D. Toya and I. Trigger and Z. Tr{\'o}cs{\'a}nyi and E. Tsur and Turner-Watson, {M. F.} and I. Ueda and B. {\'U}jv{\'a}ri and Vollmer, {C. F.} and P. Vannerem and R. V{\'e}rtesi and M. Verzocchi and H. Voss and J. Vossebeld and Ward, {C. P.} and Ward, {D. R.} and Watkins, {P. M.} and Watson, {A. T.} and Watson, {N. K.} and Wells, {P. S.} and T. Wengler and N. Wermes and Wilson, {G. W.} and Wilson, {J. A.} and G. Wolf and Wyatt, {T. R.} and S. Yamashita and D. Zer-Zion and L. Zivkovic",
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TY - JOUR

T1 - Measurement of αs with radiative hadronic events

AU - Abbiendi, G.

AU - Ainsley, C.

AU - Åkesson, P. F.

AU - Alexander, G.

AU - Anagnostou, G.

AU - Anderson, K. J.

AU - Asai, S.

AU - Axen, D.

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 - Brown, R. M.

AU - Burckhart, H. J.

AU - Campana, S.

AU - Capiluppi, P.

AU - Carnegie, R. K.

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 - Dallavalle, M.

AU - De Roeck, A.

AU - De Wolf, E. A.

AU - Desch, K.

AU - Dienes, B.

AU - Dubbert, J.

AU - Duchovni, E.

AU - Duckeck, G.

AU - Duerdoth, I. P.

AU - Etzion, E.

AU - Fabbri, F.

AU - Ferrari, P.

AU - Fiedler, F.

AU - Fleck, I.

AU - Ford, M.

AU - Frey, A.

AU - Gagnon, P.

AU - Gary, J. W.

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 - Gupta, A.

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PY - 2008/1

Y1 - 2008/1

N2 - Hadronic final states with a hard isolated photon are studied using data taken at centre-of-mass energies around the mass of the Z boson with the OPAL detector at LEP. The strong coupling αs is extracted by comparing data and QCD predictions for event shape observables at average reduced centre-of-mass energies ranging from 24 GeV to 78 GeV, and the energy dependence of αs is studied. Our results are consistent with the running of αs as predicted by QCD and show that within the uncertainties of our analysis event shapes in hadronic Z decays with hard and isolated photon radiation can be described by QCD at reduced centre-of-mass energies. Combining all values from different event shape observables and energies gives αs(MZ)=0.1182±0.0015(stat.) ±0.0101(syst.).

AB - Hadronic final states with a hard isolated photon are studied using data taken at centre-of-mass energies around the mass of the Z boson with the OPAL detector at LEP. The strong coupling αs is extracted by comparing data and QCD predictions for event shape observables at average reduced centre-of-mass energies ranging from 24 GeV to 78 GeV, and the energy dependence of αs is studied. Our results are consistent with the running of αs as predicted by QCD and show that within the uncertainties of our analysis event shapes in hadronic Z decays with hard and isolated photon radiation can be described by QCD at reduced centre-of-mass energies. Combining all values from different event shape observables and energies gives αs(MZ)=0.1182±0.0015(stat.) ±0.0101(syst.).

UR - http://www.scopus.com/inward/record.url?scp=36749015100&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=36749015100&partnerID=8YFLogxK

U2 - 10.1140/epjc/s10052-007-0470-9

DO - 10.1140/epjc/s10052-007-0470-9

M3 - Article

VL - 53

SP - 21

EP - 39

JO - European Physical Journal C

JF - European Physical Journal C

SN - 1434-6044

IS - 1

ER -