Measurement of α from the structure of particle clusters produced in hadronic Z decays

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RESEARCH PRODUCT

Measurement of α from the structure of particle clusters produced in hadronic Z decays

D Décamp B Deschizeaux C Goy J P Lees M N Minard R Alemany J M Crespo M C Delfino E Fernández V Gaitan L Garrido P Mato R Miquel L M Mir S Orteu A Pacheco J A Perlas E Tubau M G Catanesi D Creanza M De Palma A Farilla Giuseppe 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 Friedrich Dydak Roger W Forty C Grab R Hagelberg S Haywood B Jost M Kasemann Gottfried Kellner J Knobloch A Lacourt Ivan Lehraus T Lohse D Lüke A Marchioro M Martínez J May S R Menary Adolf G Minten A Miotto J Nash P Palazzi F Ranjard G Redlinger A E Roth J E Rothberg Herbert Rotscheidt Wolfgang Von Rüden R Saint-denis W D Schlatter M Takashima M Talby W Tejessy H W Wachsmuth S R Wasserbaech S Wheeler W Wiedenmann W Witzeling J Wotschack Ziad J Ajaltouni Maria Bardadin-otwinowska A Falvard R El-fellous P Gay J Harvey P Henrard J Jousset B Michel J C Montret D Pallin P Perret J Proriol F Prulhière G Stimpfl J D Hansen J R Hansen P H Hansen R Møllerud E R Nielsen B S Nilsson I Efthymiopoulos Errietta Simopoulou Anna Vayaki J Badier A Blondel G R Bonneaud J Bourotte F Braems J C Brient G Fouque A Gamess R Guirlet C Lemoine P Matricon M Maubras R Morano P Miné J Y Parey P Poilleux A Rosowsky A Rougé M Rumpf R Tanaka H L Videau D J Candlin E Veitch G Parrini M Corden C H Georgiopoulos M Ikeda J E Lannutti D A Levinthal Michael E Mermikides L Sawyer A Antonelli R Baldini G Bencivenni G Bologna P Campana G Capon V Chiarella B D'ettorre-piazzoli G Felici P Laurelli G Mannocchi F Massimo-brancaccio F Murtas G P Murtas G Nicoletti L Passalacqua M Pepé-altarelli P Picchi P Zografou B Altoon O Boyle A W Halley I Ten Have J A Hearns J G Lynch W T Morton C Raine J M Scarr K Smith A S Thompson B Brandl O Braun R Geiges C Geweniger P Hanke V Hepp W Heyde E E Kluge Y Maumary A Putzer B Rensch K Schmitt A Stahl K Tittel M Wunsch A T Belk R Beuselinck David M Binnie W Cameron M Cattaneo Peter J Dornan S Dugeay A M Greene J F Hassard N M Lieske S J Patton D G Payne D G Phillips J K Sedgbeer G Taylor I R Tomalin A G Wright P Girtler D Kuhn G Rudolph C K Bowdery T J Brodbeck A J Finch F Foster G Hughes N R Keemer M Nuttall A D Patel B S Rowlingson Terence Sloan S W Snow E P Whelan T Barczewski L A T Bauerdick K Kleinknecht B Renk S Roehn M Schmelling H Schmidt F Steeg J P Albanese Jean-jacques Aubert C Benchouk V Bernard A Bonissent D Courvoisier F Etienne S Papalexiou P Payre B Pietrzyk Z Qian Walter Blum Paolo Walter Cattaneo G D Cowan Bernd Dehning H Dietl M Fernández-bosman Traudl Hansl-kozanecka A Jahn Witold Kozanecki E Lange G Lütjens Gerhard Lutz W Männer H G Moser R H Richter J Schröder A Schwarz Ronald Settles U Stierlin J Thomas G Wolf V Bertin G De Bouard J Boucrot O Callot X Chen A Cordier M Davier G Ganis J F Grivaz P Heusse P Janot V Journé D W Kim J Lefrançois A M Lutz J J Veillet I Videau Z Zhang F Zomer S R Amendolia G Bagliesi G Batignani L Bosisio U Bottigli C Bradaschia M Carpinelli M A Ciocci R Dell'orso I Ferrante F Fidecaro L Foà E Focardi F Forti A Giassi M A Giorgi F Ligabue A Lusiani E B Mannelli P S Marrocchesi A Messineo L Moneta Fabrizio Palla G Sanguinetti Jack Steinberger Roberto Tenchini G Tonelli G Triggiani C Vannini-castaldi A Venturi P G Verdini J Walsh J M Carter M G Green P V March T Medcalf I S Quazi M R Saich J Strong R M Thomas L R West T Wildish David R Botterill R W Clifft T R Edgecock M Edwards S M Fisher T J Jones P R Norton D P Salmon J C Thompson R Bernard B Bloch-devaux P Colas C Klopfenstein E Lançon E Locci Sotirios S Loucatos E Monnier P Pérez F Perrier J Rander J F Renardy A Roussarie J P Schuller J Schwindling John Gavin Ashman C N Booth C M Buttar R E Carney S L Cartwright F Combley M Dinsdale M Dogru F Hatfield J Martín D Parker P Reeves L F Thompson S Brandt H Burkhardt Claus Grupen H Meinhard L Mirabito E Neugebauer U Schäfer H C J Seywerd G Apollinari G Giannini B Gobbo F Liello Luigi Rolandi U Stiegler L Bellantoni J F Boudreau D Cinabro J S Conway D F Cowen A J De Weerd Z Feng D P S Ferguson Y S Gao J Grahl J L Harton J M Hilgart J E Jacobsen R C Jared R P Johnson B W Leclaire J R Pater Y Saadi V Sharma M A Walsh J A Wear F V Weber M H Whitney Wu Sau Lan Z L Zho G Zobernig

subject

Physics Nuclear and High Energy Physics Particle physics media_common.quotation_subject Electron–positron annihilation Hadron Asymmetry Resonance (particle physics)Renormalization Nuclear physics Particle High Energy Physics::Experiment Invariant mass Event (particle physics)Particle Physics - Experiment media_common

description

Abstract Using 106 000 hadronic events obtained with the ALEPH detector at LEP at energies close to the Z resonance peak, the strong coupling constant αs is measured by an analysis of energy-energy correlations (EEC) and the global event shape variables thrust, C-parameter and oblateness. It is shown that the theoretical uncertainties can be significantly reduced if the final state particles are first combined in clusters using a minimum scaled invariant mass cut, Ycut, before these variables are computed. The combined result from all shape variables of pre-clustered events is αs(MZ2 = 0.117±0.005 for a renormalization scale μ= 1 2 M Z . For μ values between MZ and the b-quark mass, the result changes by −0.009+0.006.

year	journal	country	edition	language
1991-01-01	Physics Letters B

https://doi.org/10.1016/0370-2693(91)91926-m