Search for standard model Higgs boson production in association with a W boson using a neural network discriminant at CDF

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Aaltonen , T , Mehtala , P , Orava , R , Maki , T , Saarikko , H , Osterberg , K & CDF Collaboration 2009 , ' Search for standard model Higgs boson production in association with a W boson using a neural network discriminant at CDF ' , Physical Review D : Particles, Fields, Gravitation and Cosmology , vol. 80 , no. 1 , pp. 012002 . https://doi.org/10.1103/PhysRevD.80.012002

Title: Search for standard model Higgs boson production in association with a W boson using a neural network discriminant at CDF
Alternative title: Search for Standard Model Higgs Boson Production in Association with a W Boson using a Neural Network
Author: Aaltonen, Timo; Mehtala, P.; Orava, R.; Maki, T.; Saarikko, H.; Osterberg, K.; CDF Collaboration
Contributor organization: Helsinki Institute of Physics
Particle Physics and Astrophysics
Date: 2009
Language: eng
Number of pages: 15
Belongs to series: Physical Review D : Particles, Fields, Gravitation and Cosmology
ISSN: 1550-7998
DOI: https://doi.org/10.1103/PhysRevD.80.012002
URI: http://hdl.handle.net/10138/24423
Abstract: We present a search for standard model Higgs boson production in association with a W boson in proton-antiproton collisions at a center of mass energy of 1.96 TeV. The search employs data collected with the CDF II detector that correspond to an integrated luminosity of approximately 1.9 inverse fb. We select events consistent with a signature of a single charged lepton, missing transverse energy, and two jets. Jets corresponding to bottom quarks are identified with a secondary vertex tagging method, a jet probability tagging method, and a neural network filter. We use kinematic information in an artificial neural network to improve discrimination between signal and background compared to previous analyses. The observed number of events and the neural network output distributions are consistent with the standard model background expectations, and we set 95% confidence level upper limits on the production cross section times branching fraction ranging from 1.2 to 1.1 pb or 7.5 to 102 times the standard model expectation for Higgs boson masses from 110 to $150 GeV/c^2, respectively.We present a search for standard model Higgs boson production in association with a W boson in proton-antiproton collisions (pp̅ →W±H→ℓνbb̅ ) at a center of mass energy of 1.96 TeV. The search employs data collected with the CDF II detector that correspond to an integrated luminosity of approximately 1.9  fb-1. We select events consistent with a signature of a single charged lepton (e±/μ±), missing transverse energy, and two jets. Jets corresponding to bottom quarks are identified with a secondary vertex tagging method, a jet probability tagging method, and a neural network filter. We use kinematic information in an artificial neural network to improve discrimination between signal and background compared to previous analyses. The observed number of events and the neural network output distributions are consistent with the standard model background expectations, and we set 95% confidence level upper limits on the production cross section times branching fraction ranging from 1.2 to 1.1 pb or 7.5 to 102 times the standard model expectation for Higgs boson masses from 110 to 150  GeV/c2, respectively.
Description: Submitted to Phys. Rev. D
Subject: hep-ex
114 Physical sciences
Peer reviewed: Yes
Usage restriction: restrictedAccess


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