MEASUREMENT OF THE AXIAL-VECTOR-TAU SPECTRAL FUNCTIONS AND DETERMINATION OF ALPHA(S)(M-TAU(2)) FROM HADRONIC TAU-DECAYS

Authors
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 FERNANDEZBOSMAN 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 DEPALMA 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 BRIGHTTHOMAS 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 L 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 PEPEALTARELLI M CURTIS L HALLEY AW LYNCH JG NEGUS P OSHEA V RAINE C SCARR JM SMITH K TEIXEIRADIAS 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 VANGEMMEREN 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 LEDIBERDER 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 DELLORSO R FANTECHI R FERRANTE I FOA L FORTI F GIASSI A GIORGI MA GREGORIO A LIGABUE F LUSIANI A 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 VONWIMMERSPERGTOELLER JH BOTTERILL DR CLIFFT RW EDGECOCK TR HAYWOOD S NORTON PR THOMPSON JC WRIGHT AE BLOCHDEVAUX 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 DELLAMARINA 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
Citation
R. Barate et al., MEASUREMENT OF THE AXIAL-VECTOR-TAU SPECTRAL FUNCTIONS AND DETERMINATION OF ALPHA(S)(M-TAU(2)) FROM HADRONIC TAU-DECAYS, EUROPEAN PHYSICAL JOURNAL C-PARTICLES AND FIELDS, 4(3), 1998, pp. 409-431
Citations number
79
Categorie Soggetti
Physics, Particles & Fields
Journal title
EUROPEAN PHYSICAL JOURNAL C-PARTICLES AND FIELDS → ACNP
ISSN journal
14346044
Volume
4
Issue
3
Year of publication
1998
Pages
409 - 431
Database
ISI
SICI code
1434-6044(1998)4:3<409:MOTASF>2.0.ZU;2-S
Abstract
An analysis based on 124000 selected tau pairs recorded by the ALEPH d etector at LEP provides the vector (V) and axial-vector (A) spectral f unctions of hadronic tau decays together with their total widths. This allows the evaluation of finite energy chiral sum rules that are weig hted integrals over the (V - A) spectral functions. In addition, a pre cise measurement of alpha(s) along with a determination of nonperturba tive contributions at the tau mass scale is performed. The experimenta lly 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)) = 0.33 4 +/- 0.022 giving alpha(s)(M-Z(2)) = 0.1202 +/- 0.0027 after the extr apolation to the mass of the Z boson. The approach of the Operator Pro duct Expansion (OPE) is tested experimentally studying the evolution o f the tau hadronic widths to masses smaller than the tau mass.