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.

Combination of CDF and D0 measurements of the W boson helicity in top quark decays / T., A., V. M., A., B., A., B. S., A., M., A., T., A., G. D., A., G., A., A., A., B. A., G., G., A., S., A., D., A., A., A., A., A., J., A., M., A., G., A., J. A., A., T., A., et al.. - In: PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY. - ISSN 1550-7998. - 85:7(2012), p. 071106. [10.1103/physrevd.85.071106]

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

BAUCE, MATTEO;GIAGU, Stefano;IORI, Maurizio;MARGAROLI, Fabrizio;
2012

Abstract

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.
2012
01 Pubblicazione su rivista::01a Articolo in rivista
Combination of CDF and D0 measurements of the W boson helicity in top quark decays / T., A., V. M., A., B., A., B. S., A., M., A., T., A., G. D., A., G., A., A., A., B. A., G., G., A., S., A., D., A., A., A., A., A., J., A., M., A., G., A., J. A., A., T., A., et al.. - In: PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY. - ISSN 1550-7998. - 85:7(2012), p. 071106. [10.1103/physrevd.85.071106]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/472923
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