Combination of CDF and D0 measurements of the W boson helicity in top quark decays

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dc.date.accessioned2014-05-27T11:26:27Z
dc.date.accessioned2022-10-05T18:34:02Z
dc.date.available2014-05-27T11:26:27Z
dc.date.available2022-10-05T18:34:02Z
dc.date.created2014-05-27T11:26:27Z
dc.date.issued2012-04-27
dc.identifierPhysical Review D - Particles, Fields, Gravitation and Cosmology, v. 85, n. 7, 2012.
dc.identifier1550-7998
dc.identifier1550-2368
dc.identifierhttp://hdl.handle.net/11449/73297
dc.identifier10.1103/PhysRevD.85.071106
dc.identifier2-s2.0-84860492123
dc.identifier2-s2.0-84860492123.pdf
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/3922308
dc.description.abstractWe 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.
dc.languageeng
dc.relationPhysical Review D: Particles, Fields, Gravitation and Cosmology
dc.rightsAcesso restrito
dc.sourceScopus
dc.titleCombination of CDF and D0 measurements of the W boson helicity in top quark decays
dc.typeArtigo


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