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Combination of CDF and D0 measurements of the $W$ boson helicity in top quark decays [electronic resource].

Published:
Washington, D.C. : United States. Dept. of Energy. Office of Science, 2012.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description:
11 pages : digital, PDF file
Additional Creators:
Fermi National Accelerator Laboratory, United States. Department of Energy. Office of Science, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary:
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 2.7-5.4 fb⁻¹ of p{bar p} collisions collected during Run II of the Fermilab Tevatron Collider. Combining measurements that simultaneously determine the fractions of W bosons with longitudinal (f₀) and right-handed (f₊) helicities, we find f₀ = 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 f₀ = 0.682 ± 0.057 [± 0.035 (stat.) ± 0.046 (syst.)] and f₊ = ?0.015 ± 0.035 [± 0.018 (stat.) ± 0.030 (syst.)]. The results are consistent with standard model expectations.
Report Numbers:
E 1.99:fermilab-pub-12-043-e
fermilab-pub-12-043-e
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Other Subject(s):
Note:
Published through SciTech Connect.
02/01/2012.
"fermilab-pub-12-043-e"
"arXiv eprint number arXiv:1202.5272"
Submitted to Phys.Rev.D 85 7 ISSN 1550--7998 FT
Aaltonen, T.; Alvarez Gonzalez, B.; Abbott, B.; Acharya, B.S.; Adams, M.; Alton, A.; Abazov, V.M.; Adams, T.; Alexeev, G.D.; Alkhazov, G.; Alverson, G.
Funding Information:
AC02-07CH11359
View MARC record | catkey: 14706231