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Title: Measurement of the W boson helicity in top quark decays using 5.4 fb{sup -1} of pp collision data

Abstract

We present a measurement of the helicity of the W boson produced in top quark decays using tt decays in the l+jets and dilepton final states selected from a sample of 5.4 fb{sup -1} of collisions recorded using the D0 detector at the Fermilab Tevatron pp collider. We measure the fractions of longitudinal and right-handed W bosons to be f{sub 0}=0.669{+-}0.102[{+-}0.078(stat.){+-}0.065(syst.)] and f{sub +}=0.023{+-}0.053[{+-}0.041(stat.){+-}0.034(syst.)], respectively. This result is consistent at the 98% level with the standard model. A measurement with f{sub 0} fixed to the value from the standard model yields f{sub +}=0.010{+-}0.037[{+-}0.022(stat.){+-}0.030(syst.).].

Authors:
; ; ; ; ; ; ;  [1]; ; ; ; ; ; ;  [2]; ; ;  [3]; ;  [4]
  1. Joint Institute for Nuclear Research, Dubna (Russian Federation)
  2. University of Oklahoma, Norman, Oklahoma 73019 (United States)
  3. Tata Institute of Fundamental Research, Mumbai (India)
  4. University of Illinois at Chicago, Chicago, Illinois 60607 (United States)
Publication Date:
OSTI Identifier:
21504852
Resource Type:
Journal Article
Journal Name:
Physical Review. D, Particles Fields
Additional Journal Information:
Journal Volume: 83; Journal Issue: 3; Other Information: DOI: 10.1103/PhysRevD.83.032009; (c) 2011 American Institute of Physics; Journal ID: ISSN 0556-2821
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; COLLISIONS; FERMILAB TEVATRON; HELICITY; INTERMEDIATE BOSONS; PARTICLE DECAY; PROTON-PROTON INTERACTIONS; STANDARD MODEL; T QUARKS; W MINUS BOSONS; W PLUS BOSONS; ACCELERATORS; BARYON-BARYON INTERACTIONS; BOSONS; CYCLIC ACCELERATORS; DECAY; ELEMENTARY PARTICLES; FERMIONS; FIELD THEORIES; GRAND UNIFIED THEORY; HADRON-HADRON INTERACTIONS; INTERACTIONS; INTERMEDIATE VECTOR BOSONS; MATHEMATICAL MODELS; NUCLEON-NUCLEON INTERACTIONS; PARTICLE INTERACTIONS; PARTICLE MODELS; PARTICLE PROPERTIES; POSTULATED PARTICLES; PROTON-NUCLEON INTERACTIONS; QUANTUM FIELD THEORY; QUARKS; SYNCHROTRONS; TOP PARTICLES; UNIFIED GAUGE MODELS

Citation Formats

Abazov, V M, Alexeev, G D, Golovanov, G, Kharzheev, Y N, Malyshev, V L, Tokmenin, V V, Vertogradov, L S, Yatsunenko, Y A, Abbott, B, Gutierrez, P, Hossain, S, Severini, H, Skubic, P, Strauss, M, Svoisky, P, Acharya, B S, Banerjee, S, Mondal, N K, Adams, M, and Bazterra, V. Measurement of the W boson helicity in top quark decays using 5.4 fb{sup -1} of pp collision data. United States: N. p., 2011. Web. doi:10.1103/PHYSREVD.83.032009.
Abazov, V M, Alexeev, G D, Golovanov, G, Kharzheev, Y N, Malyshev, V L, Tokmenin, V V, Vertogradov, L S, Yatsunenko, Y A, Abbott, B, Gutierrez, P, Hossain, S, Severini, H, Skubic, P, Strauss, M, Svoisky, P, Acharya, B S, Banerjee, S, Mondal, N K, Adams, M, & Bazterra, V. Measurement of the W boson helicity in top quark decays using 5.4 fb{sup -1} of pp collision data. United States. https://doi.org/10.1103/PHYSREVD.83.032009
Abazov, V M, Alexeev, G D, Golovanov, G, Kharzheev, Y N, Malyshev, V L, Tokmenin, V V, Vertogradov, L S, Yatsunenko, Y A, Abbott, B, Gutierrez, P, Hossain, S, Severini, H, Skubic, P, Strauss, M, Svoisky, P, Acharya, B S, Banerjee, S, Mondal, N K, Adams, M, and Bazterra, V. 2011. "Measurement of the W boson helicity in top quark decays using 5.4 fb{sup -1} of pp collision data". United States. https://doi.org/10.1103/PHYSREVD.83.032009.
@article{osti_21504852,
title = {Measurement of the W boson helicity in top quark decays using 5.4 fb{sup -1} of pp collision data},
author = {Abazov, V M and Alexeev, G D and Golovanov, G and Kharzheev, Y N and Malyshev, V L and Tokmenin, V V and Vertogradov, L S and Yatsunenko, Y A and Abbott, B and Gutierrez, P and Hossain, S and Severini, H and Skubic, P and Strauss, M and Svoisky, P and Acharya, B S and Banerjee, S and Mondal, N K and Adams, M and Bazterra, V},
abstractNote = {We present a measurement of the helicity of the W boson produced in top quark decays using tt decays in the l+jets and dilepton final states selected from a sample of 5.4 fb{sup -1} of collisions recorded using the D0 detector at the Fermilab Tevatron pp collider. We measure the fractions of longitudinal and right-handed W bosons to be f{sub 0}=0.669{+-}0.102[{+-}0.078(stat.){+-}0.065(syst.)] and f{sub +}=0.023{+-}0.053[{+-}0.041(stat.){+-}0.034(syst.)], respectively. This result is consistent at the 98% level with the standard model. A measurement with f{sub 0} fixed to the value from the standard model yields f{sub +}=0.010{+-}0.037[{+-}0.022(stat.){+-}0.030(syst.).].},
doi = {10.1103/PHYSREVD.83.032009},
url = {https://www.osti.gov/biblio/21504852}, journal = {Physical Review. D, Particles Fields},
issn = {0556-2821},
number = 3,
volume = 83,
place = {United States},
year = {Tue Feb 01 00:00:00 EST 2011},
month = {Tue Feb 01 00:00:00 EST 2011}
}