Measurement of αs from scaling violations in fragmentation functions in e+e− annihilation

Measurement of αs from scaling violations in fragmentation functions in e+e− annihilation

A study of scaling violations in fragmentation functions performed by the ALEPH collaboration at LEP is presented. Data samples enriched in uds, c, b and gluon jets, respectively, together with measurements of the longitudinal and transverse inclusive cross sections are used to extract the fragmenta...

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Veröffentlicht in:Physics letters. B 1995, Vol.357 (3), p.487-499
Hauptverfasser: De Bonis, I, Minard, M.-N, Fernandez-Bosman, M, Garrido, Ll, Martinez, M, Orteu, S, Pacheco, A, Palla, F, Sanchez, F, Colaleo, A, de Palma, M, Farilla, A, Marinelli, N, Natali, S, Romano, F, Silvestris, L, Zito, G, Zhao, W, Forty, R.W, Jacobsen, R, Markou, C, Pusztaszeri, J.-F, Rensing, P, Schlatter, D, Bardadin-Otwinowska, M, Gay, P, Jousset, J, Michel, B, Perret, P, Hansen, P.H, Bonneaud, G, Brient, J.C, Verderi, M, Videau, H, Candlin, D.J, Parrini, G, Corden, M, Delfino, M, Bossi, F, Capon, G, Laurelli, P, ten Have, I, Knowles, I.G, Lynch, J.G, Thomson, F, Schmidt, M, Dornan, P.J, Foster, F, Galla, A, Greene, A.M, Renk, B, Sander, H.-G, Bencheikh, A.M, Etienne, F, Thulasidas, M, Talby, M, Assmann, R, Blum, W, Jakobs, K, Moser, H.-G, Boucrot, J, Cordier, A, Courault, F, Davier, M, Heusse, Ph, Kim, D.W, Musolino, G, Videau, I, Abbaneo, D, Ciocci, M.A, Foà, L, Ligabue, F, Lusiani, A, Marrocchesi, P.S, Messineo, A, Sciabà, A, Tenchini, R, Tonelli, G, Gao, Y, Green, M.G, Johnson, D.L, Mir, Ll.M, Perrodo, P, Botterill, D.R, Clifft, R.W, Bloch-Devaux, B, Kozanecki, W, Locci, E, Marx, B, Renardy, J.-F, Rosowsky, A, Combley, F, Dawson, I, Thompson, L.F, Ragusa, F, Rothberg, J, González, S, Hu, H, Sharma, V, Wu, X
Format: Artikel
Sprache:eng
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High Energy Physics - Experiment
Physics
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Zusammenfassung:A study of scaling violations in fragmentation functions performed by the ALEPH collaboration at LEP is presented. Data samples enriched in uds, c, b and gluon jets, respectively, together with measurements of the longitudinal and transverse inclusive cross sections are used to extract the fragmentation function for the gluon and for each flavour. The measurements are compared to data from experiments at energies between 22 GeV and 91 GeV and scaling violations consistent with QCD predictions are observed. From this, a measurement of the strong coupling constant α s ( Mz) = 0.126 ±0.009 is obtained.
ISSN:0370-2693
1873-2445
DOI:10.1016/0370-2693(95)00917-A