Combination of CDF and D0 measurements of the W boson helicity in top quark decays
Contribuinte(s) |
Universidade Estadual Paulista (UNESP) |
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Data(s) |
27/05/2014
27/05/2014
27/04/2012
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Resumo |
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. |
Identificador |
http://dx.doi.org/10.1103/PhysRevD.85.071106 Physical Review D - Particles, Fields, Gravitation and Cosmology, v. 85, n. 7, 2012. 1550-7998 1550-2368 http://hdl.handle.net/11449/73297 10.1103/PhysRevD.85.071106 2-s2.0-84860492123 2-s2.0-84860492123.pdf |
Idioma(s) |
eng |
Relação |
Physical Review D: Particles, Fields, Gravitation and Cosmology |
Direitos |
closedAccess |
Tipo |
info:eu-repo/semantics/article |