Measurement of the axial-vector tau spectral functions and determination of alpha(s)(M-tau(2)) from hadronic tau decays

Barate, R; Buskulic, D; Decamp, D; Ghez, P; Goy, C; Lees, Jp; Lucotte, A; Merle, E; Minard, Mn; Nief, Jy; Pietrzyk, B; Alemany, R; Boix, G; Casado, Mp; Chmeissani, M; Crespo, Jm; Delfino, M; Fernandez, E; Fernandez Bosman, M; Garrido, L; Grauges, E; Juste, A; Martinez, M; Merino, G; Miquel, R; Mir, Lm; Park, Ic; Pascual, A; Perlas, Ja; Riu, I; Sanchez, F; Colaleo, A; Creanza, D; de Palma, M; Gelao, G; 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; Becker, U; Bright Thomas, P; Casper, D; Cattaneo, M; Ciulli, V; Dissertori, G; Drevermann, H; Forty, Rw; Frank, M; Hagelberg, R; Hansen, Jb; Harvey, J; Janot, P; Jost, B; Lehraus, I; Mato, P; Minten, A; Moneta, L; Pacheco, A; Pusztaszeri, Jf; Ranjard, F; Rolandi, Luigi; Rousseau, D; Schlatter, D; Schmitt, M; Schneider, O; Tejessy, W; Teubert, F; Tomalin, Ir; Wachsmuth, H; Wagner, A; Ajaltouni, Z; Badaud, F; Chazelle, G; Deschamps, O; Falvard, A; Ferdi, C; Gay, P; Guicheney, C; Henrard, P; Jousset, J; Michel, B; Monteil, S; Montret, Jc; Pallin, D; Perret, F; Podlyski, F; Proriol, J; Rosnet, P; Hansen, Jd; Hansen, Jr; Hansen, Ph; Nilsson, Bs; Rensch, B; Waananen, A; Daskalakis, G; Kyriakis, A; Markou, C; Simopoulou, E; Siotis, I; Vayaki, A; Blondel, A; Bonneaud, G; Brient, Jc; Bourdon, P; Rouge, A; Rumpf, M; Valassi, A; Verderi, M; Videau, H; Focardi, E; Parrini, G; Zachariadou, K; Corden, M; Georgiopoulos, C; Jaffe, De; Antonelli, A; Bencivenni, G; Bologna, G; Bossi, F; Campana, P; Capon, G; Cerutti, F; Chiarella, V; Felici, G; Laurelli, P; Mannocchi, G; Murtas, F; Murtas, Gp; Passalacqua, L; Pepe Altarelli, M; Curtis, L; Halley, Aw; Lynch, Jg; Negus, P; O'Shea, V; Raine, C; Scarr, Jm; Smith, K; Teixeira Dias, P; Thompson, As; Thomson, E; Buchmuller, O; Dhamotharan, S; Geweniger, C; Graefe, G; Hanke, P; Hansper, G; Hepp, V; Kluge, Ee; Putzer, A; Sommer, J; Tittel, K; Werner, S; Wunsch, M; Beuselinck, R; Binnie, Dm; Cameron, W; Dornan, Pj; Girone, M; Goodsir, S; Martin, Eb; Marinelli, N; Moutoussi, A; Nash, J; Sedgbeer, Jk; Spagnolo, P; Williams, Md; Ghete, Vm; Girtler, P; Kneringer, E; Kuhn, D; Rudolph, G; Betteridge, Ap; Bowdery, Ck; Buck, Pg; Colrain, P; Crawford, G; Finch, Aj; Foster, F; Hughes, G; Jones, Rwl; Williams, Mi; Giehl, I; Greene, Am; Hoffmann, C; Jakobs, K; Kleinknecht, K; Quast, G; Renk, B; Rohne, E; Sander, Hg; van Gemmeren, P; Zeitnitz, C; Aubert, Jj; Benchouk, C; Bonissent, A; Bujosa, G; Carr, J; Coyle, P; Etienne, F; Leroy, O; Motsch, F; Payre, P; Talby, M; Sadouki, A; Thulasidas, M; Trabelsi, K; Aleppo, M; Antonelli, M; Ragusa, F; Berlich, R; Blum, W; Buscher, V; Dietl, H; Ganis, G; Kroha, H; Lutjens, G; Mannert, C; Manner, W; Moser, Hg; Schael, S; Settles, R; Seywerd, H; Stenzel, H; Wiedenmann, W; Wolf, G; Boucrot, J; Callot, O; Chen, S; Cordier, A; Davier, M; Duflot, L; Grivaz, Jf; Heusse, P; Hocker, A; Jacholkowska, A; Kim, Dw; Le Diberder, F; Lefrancois, J; Lutz, Am; Schune, Mh; Tournefier, E; Veillet, Jj; Videau, I; Zerwas, D; Azzurri, P; Bagliesi, G; Batignani, G; Bettarini, S; Boccali, T; Bozzi, C; Calderini, G; Carpinelli, M; Ciocci, Na; Dell'Orso, R; Fantechi, R; Ferrante, I; Foa, L; Forti, F; Giassi, A; Giorgi, Ma; Gregorio, A; Ligabue, Franco; Lusiani, Alberto; Marrocchesi, Ps; Messineo, A; Palla, F; Rizzo, G; Sanguinetti, G; Sciaba, A; Tenchini, R; Tonelli, G; Vannini, C; Venturi, A; Verdini, Pg; Blair, Ga; Bryant, Lm; Chambers, Jt; Green, Mg; Medcalf, T; Perrodo, P; Strong, Ja; von Wimmersperg Toeller JH,; Botterill, Dr; Clifft, Rw; Edgecock, Tr; Haywood, S; Norton, Pr; Thompson, Jc; Wright, Ae; Bloch Devaux, B; Colas, P; Emery, S; Kozanecki, W; Lancon, E; Lemaire, Mc; Locci, E; Perez, P; Rander, J; Renardy, Jf; Roussarie, A; Schuller, Jp; Schwindling, J; Trabelsi, A; Vallage, B; Black, Sn; Dann, Jh; Johnson, Rp; Kim, Hy; Konstantinidis, N; Litke, Am; McNeil, Ma; Taylor, G; Booth, Cn; Brew, Caj; Cartwright, S; Combley, F; Kelly, Ms; Lehto, M; Reeve, J; Thompson, Lf; Affholderbach, K; Bohrer, A; Brandt, S; Cowan, G; Grupen, C; Saraiva, P; Smolik, L; Stephan, F; Apollonio, M; Bosisio, L; Della Marina, R; Giannini, G; Gobbo, B; Musolino, G; Rothberg, J; Wasserbaech, S; Armstrong, Sr; Charles, E; Elmer, P; Ferguson, Dps; Gao, Y; Gonzalez, S; Greening, Tc; Hayes, Oj; Hu, H; Jin, S; McNamara, Pa; Nachtman, Jm; Nielsen, J; Orejudos, W; Pan, Yb; Saadi, Y; Scott, Ij; Walsh, J; Wu, Sl; Wu, X; Zobernig, G.

doi:10.1007/s100520050217

An analysis based on 124000 selected tau pairs recorded by the ALEPH detector at LEP provides the vector (V) and axial-vector (A) spectral functions of hadronic tau decays together with their total widths. This allows the evaluation of finite energy chiral sum rules that are weighted integrals over the (V - A) spectral functions. In addition, a precise measurement of alpha(s) along with a determination of nonperturbative contributions at the tau mass scale is performed. The experimentally and theoretically most robust determination of alpha(s)(M-tau(2)) is obtained from the (V + A) fit that yields alpha(s)(M-tau(2)) = 0.334 +/- 0.022 giving alpha(s)(M-Z(2)) = 0.1202 +/- 0.0027 after the extrapolation to the mass of the Z boson. The approach of the Operator Product Expansion (OPE) is tested experimentally studying the evolution of the tau hadronic widths to masses smaller than the tau mass.

Titolo:	Measurement of the axial-vector tau spectral functions and determination of alpha(s)(M-tau(2)) from hadronic tau decays
Autori:	Barate R Buskulic D Decamp D Ghez P Goy C Lees JP Lucotte A Merle E Minard MN Nief JY Pietrzyk B Alemany R Boix G Casado MP Chmeissani M Crespo JM Delfino M Fernandez E Fernandez Bosman M Garrido L Grauges E Juste A Martinez M Merino G Miquel R Mir LM Park IC Pascual A Perlas JA Riu I Sanchez F Colaleo A Creanza D de Palma M Gelao G 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 Becker U Bright Thomas P Casper D Cattaneo M Ciulli V Dissertori G Drevermann H Forty RW Frank M Hagelberg R Hansen JB Harvey J Janot P Jost B Lehraus I Mato P Minten A Moneta L Pacheco A Pusztaszeri JF Ranjard F ROLANDI, LUIGI Rousseau D Schlatter D Schmitt M Schneider O Tejessy W Teubert F Tomalin IR Wachsmuth H Wagner A Ajaltouni Z Badaud F Chazelle G Deschamps O Falvard A Ferdi C Gay P Guicheney C Henrard P Jousset J Michel B Monteil S Montret JC Pallin D Perret F Podlyski F Proriol J Rosnet P Hansen JD Hansen JR Hansen PH Nilsson BS Rensch B Waananen A Daskalakis G Kyriakis A Markou C Simopoulou E Siotis I Vayaki A Blondel A Bonneaud G Brient JC Bourdon P Rouge A Rumpf M Valassi A Verderi M Videau H Focardi E Parrini G Zachariadou K Corden M Georgiopoulos C Jaffe DE Antonelli A Bencivenni G Bologna G Bossi F Campana P Capon G Cerutti F Chiarella V Felici G Laurelli P Mannocchi G Murtas F Murtas GP Passalacqua L Pepe Altarelli M Curtis L Halley AW Lynch JG Negus P O'Shea V Raine C Scarr JM Smith K Teixeira Dias P Thompson AS Thomson E Buchmuller O Dhamotharan S Geweniger C Graefe G Hanke P Hansper G Hepp V Kluge EE Putzer A Sommer J Tittel K Werner S Wunsch M Beuselinck R Binnie DM Cameron W Dornan PJ Girone M Goodsir S Martin EB Marinelli N Moutoussi A Nash J Sedgbeer JK Spagnolo P Williams MD Ghete VM Girtler P Kneringer E Kuhn D Rudolph G Betteridge AP Bowdery CK Buck PG Colrain P Crawford G Finch AJ Foster F Hughes G Jones RWL Williams MI Giehl I Greene AM Hoffmann C Jakobs K Kleinknecht K Quast G Renk B Rohne E Sander HG van Gemmeren P Zeitnitz C Aubert JJ Benchouk C Bonissent A Bujosa G Carr J Coyle P Etienne F Leroy O Motsch F Payre P Talby M Sadouki A Thulasidas M Trabelsi K Aleppo M Antonelli M Ragusa F Berlich R Blum W Buscher V Dietl H Ganis G Kroha H Lutjens G Mannert C Manner W Moser HG Schael S Settles R Seywerd H Stenzel H Wiedenmann W Wolf G Boucrot J Callot O Chen S Cordier A Davier M Duflot L Grivaz JF Heusse P Hocker A Jacholkowska A Kim DW Le Diberder F Lefrancois J Lutz AM Schune MH Tournefier E Veillet JJ Videau I Zerwas D Azzurri P Bagliesi G Batignani G Bettarini S Boccali T Bozzi C Calderini G Carpinelli M Ciocci NA Dell'Orso R Fantechi R Ferrante I Foa L Forti F Giassi A Giorgi MA Gregorio A LIGABUE, FRANCO LUSIANI, Alberto Marrocchesi PS Messineo A Palla F Rizzo G Sanguinetti G Sciaba A Tenchini R Tonelli G Vannini C Venturi A Verdini PG Blair GA Bryant LM Chambers JT Green MG Medcalf T Perrodo P Strong JA von Wimmersperg Toeller JH Botterill DR Clifft RW Edgecock TR Haywood S Norton PR Thompson JC Wright AE Bloch Devaux B Colas P Emery S Kozanecki W Lancon E Lemaire MC Locci E Perez P Rander J Renardy JF Roussarie A Schuller JP Schwindling J Trabelsi A Vallage B Black SN Dann JH Johnson RP Kim HY Konstantinidis N Litke AM McNeil MA Taylor G Booth CN Brew CAJ Cartwright S Combley F Kelly MS Lehto M Reeve J Thompson LF Affholderbach K Bohrer A Brandt S Cowan G Grupen C Saraiva P Smolik L Stephan F Apollonio M Bosisio L Della Marina R Giannini G Gobbo B Musolino G Rothberg J Wasserbaech S Armstrong SR Charles E Elmer P Ferguson DPS Gao Y Gonzalez S Greening TC Hayes OJ Hu H Jin S McNamara PA Nachtman JM Nielsen J Orejudos W Pan YB Saadi Y Scott IJ Walsh J Wu SL Wu X Zobernig G. mostra contributor esterni nascondi contributor esterni
Data di pubblicazione:	1998
Rivista:	THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS
Digital Object Identifier (DOI):	http://dx.doi.org/10.1007/s100520050217
Handle:	http://hdl.handle.net/11384/4416
Appare nelle tipologie:	1.1 Articolo in rivista

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