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- Title:
- Combination of CDF and D0 measurements of the W boson helicity in top quark decays
- Aaltonen, T.
- Abazov, V. M.
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- Centro Brasileiro de Pesquisas Físicas (CBPF)
- Universidade do Estado do Rio de Janeiro (UERJ)
- Universidade Federal do ABC (UFABC)
- McGill University
- University of Science and Technology of China
- Academia Sinica
- Universidad de los Andes
- Center for Particle Physics
- Czech Technical University in Prague
- Academy of Sciences of the Czech Republic
- Universidad San Francisco de Quito
- University of Helsinki
- CNRS/IN2P3
- Institut National Polytechnique de Grenoble
- SPP
- RWTH Aachen University
- Universität Freiburg
- Georg-August-Universität Göttingen
- Karlsruhe Institute of Technology
- Universität Mainz
- Ludwig-Maximilians-Universität München
- Bergische Universität Wuppertal
- University of Athens
- Panjab University
- Delhi University
- Tata Institute of Fundamental Research
- University College Dublin
- Istituto Nazionale di Fisica Nucleare Bologna
- University of Bologna
- Istituto Nazionale di Fisica Nucleare
- Sezione di Padova-Trento
- University of Padova
- Istituto Nazionale di Fisica Nucleare Pisa
- University of Pisa
- University of Siena
- Scuola Normale Superiore
- Sezione di Roma 1
- Sapienza Università di Roma
- Istituto Nazionale di Fisica Nucleare Trieste/Udine
- University of Udine
- Okayama University
- Osaka City University
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- We report the combination of recent measurements of the helicity of the W boson from top quark decay by the CDF and D0 collaborations, based on data samples corresponding to integrated luminosities of 2.7-5.4fb -1 of pp̄ collisions collected during Run II of the Fermilab Tevatron collider. Combining measurements that simultaneously determine the fractions of W bosons with longitudinal (f 0) and right-handed (f +) helicities, we find f 0=0.722±0.081[±0.062(stat)±0.052(syst)] and f +=-0.033±0.046[±0.034(stat)±0.031(syst)]. Combining measurements where one of the helicity fractions is fixed to the value expected in the standard model, we find f 0=0.682±0. 057[±0.035(stat)±0.046(syst)] for fixed f + and f +=-0.015±0.035[±0.018(stat)±0.030(syst)] for fixed f 0. The results are consistent with standard model expectations. © 2012 American Physical Society.
- 27-Apr-2012
- Physical Review D - Particles, Fields, Gravitation and Cosmology, v. 85, n. 7, 2012.
- http://dx.doi.org/10.1103/PhysRevD.85.071106
- Acesso restrito
- outro
- http://repositorio.unesp.br/handle/11449/73297
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