In this paper, a measurement of ?? polarization in W??????? decays is presented. It is measured from the energies of the decay products in hadronic ?? decays with a single final state charged particle. The data, corresponding to an integrated luminosity of 24 pb???1, were collected by the ATLAS experiment at the Large Hadron Collider in 2010. The measured value of the ?? polarization is P??=???1.06±0.04 (stat)???0.07+0.05 (syst) , in agreement with the Standard Model prediction, and is consistent with a physically allowed 95 % CL interval [???1,???0.91]. Measurements of ?? polarization have not previously been made at hadron colliders.
Measurement of ?? polarization in W??????? decays with the ATLAS detector in pp collisions at ???s = 7 TeV / Aad, G.; Aloisio, Alberto; Alviggi, Mariagrazia; Canale, Vincenzo; Cevenini, Francesco; Chiefari, Giovanni; DELLA VOLPE, Domenico; Merola, Leonardo; Patricelli, Sergio; Conventi, Francesco; DELLA PIETRA, Massimo; Giordano, Raffaele; Musto, Elisa; Rossi, Elvira; SANCHEZ PINEDA, ARTURO RODOLFO; Carlino, Gianpaolo; de Asmundis, Riccardo; Di Donato, Camilla; Doria, Alessandra; Iengo, Paolo; Izzo, Vincenzo; Sekhniaidze, Givi; Al, e. t. .. - In: THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS. - ISSN 1434-6044. - 72:(2012), pp. 1-21. [10.1140/epjc/s10052-012-2062-6]
Measurement of ?? polarization in W??????? decays with the ATLAS detector in pp collisions at ???s = 7 TeV
ALOISIO, ALBERTO;ALVIGGI, MARIAGRAZIA;CANALE, VINCENZO;CHIEFARI, GIOVANNI;DELLA VOLPE, DOMENICO;MEROLA, LEONARDO;PATRICELLI, SERGIO;DELLA PIETRA, MASSIMO;GIORDANO, RAFFAELE;Rossi, Elvira;SANCHEZ PINEDA, ARTURO RODOLFO;
2012
Abstract
In this paper, a measurement of ?? polarization in W??????? decays is presented. It is measured from the energies of the decay products in hadronic ?? decays with a single final state charged particle. The data, corresponding to an integrated luminosity of 24 pb???1, were collected by the ATLAS experiment at the Large Hadron Collider in 2010. The measured value of the ?? polarization is P??=???1.06±0.04 (stat)???0.07+0.05 (syst) , in agreement with the Standard Model prediction, and is consistent with a physically allowed 95 % CL interval [???1,???0.91]. Measurements of ?? polarization have not previously been made at hadron colliders.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
