Search for WW and WZ production in lepton plus jets final state at CDF

doi:https://doi.org/10.1103/PHYSREVD.79.112011

Title: Search for WW and WZ production in lepton plus jets final state at CDF

Full Record
Other Related Research

Abstract

We present a search for WW and WZ production in final states that contain a charged lepton (electron or muon) and at least two jets, produced in {radical}(s)=1.96 TeV pp collisions at the Fermilab Tevatron, using data corresponding to 1.2 fb{sup -1} of integrated luminosity collected with the CDF II detector. Diboson production in this decay channel has yet to be observed at hadron colliders due to the large single W plus jets background. An artificial neural network has been developed to increase signal sensitivity, as compared with an event selection based on conventional cuts. We set a 95% confidence level upper limit of {sigma}{sub WW}xBR(W{yields}l{nu}{sub l},W{yields}jets)+{sigma}{sub WZ}xBR(W{yields}l{nu}{sub l},Z{yields}jets)<2.88 pb, which is consistent with the standard model next-to-leading-order cross section calculation for this decay channel of 2.09{+-}0.12 pb.

Authors:

Aaltonen, T; Maki, T; Mehtala, P; Orava, R; Osterberg, K; Saarikko, H; Remortel, N van ^[1]; Adelman, J; Brubaker, E; Fedorko, W T; Grosso-Pilcher, C; Ketchum, W; Kim, Y K; Krop, D; Kwang, S; Lee, H S; Paramonov, A A; Schmidt, M A; Shiraishi, S; Shochet, M ^[2]

Division of High Energy Physics, Department of Physics, University of Helsinki and Helsinki Institute of Physics, FIN-00014, Helsinki (Finland)
Enrico Fermi Institute, University of Chicago, Chicago, Illinois 60637 (United States)

Publication Date:: 2009-06-01

OSTI Identifier:: 21296419

Resource Type:: Journal Article

Journal Name:: Physical Review. D, Particles Fields

Additional Journal Information:: Journal Volume: 79; Journal Issue: 11; Other Information: DOI: 10.1103/PhysRevD.79.112011; (c) 2009 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0556-2821

Country of Publication:: United States

Language:: English

Subject:: 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; CHARGED PARTICLES; CROSS SECTIONS; ELECTRONS; FERMILAB COLLIDER DETECTOR; FERMILAB TEVATRON; HADRONS; LUMINOSITY; MUONS; PARTICLE DECAY; PARTICLE PRODUCTION; PROTON-PROTON INTERACTIONS; SENSITIVITY; STANDARD MODEL; TEV RANGE 01-10

Citation Formats


                    Aaltonen, T, Maki, T, Mehtala, P, Orava, R, Osterberg, K, Saarikko, H, Remortel, N van, Adelman, J, Brubaker, E, Fedorko, W T, Grosso-Pilcher, C, Ketchum, W, Kim, Y K, Krop, D, Kwang, S, Lee, H S, Paramonov, A A, Schmidt, M A, Shiraishi, S, and Shochet, M. Search for WW and WZ production in lepton plus jets final state at CDF.  United States: N. p., 2009. 
        Web.  doi:10.1103/PHYSREVD.79.112011.

Copy to clipboard


                    Aaltonen, T, Maki, T, Mehtala, P, Orava, R, Osterberg, K, Saarikko, H, Remortel, N van, Adelman, J, Brubaker, E, Fedorko, W T, Grosso-Pilcher, C, Ketchum, W, Kim, Y K, Krop, D, Kwang, S, Lee, H S, Paramonov, A A, Schmidt, M A, Shiraishi, S, & Shochet, M. Search for WW and WZ production in lepton plus jets final state at CDF.  United States.  https://doi.org/10.1103/PHYSREVD.79.112011

Copy to clipboard


                    Aaltonen, T, Maki, T, Mehtala, P, Orava, R, Osterberg, K, Saarikko, H, Remortel, N van, Adelman, J, Brubaker, E, Fedorko, W T, Grosso-Pilcher, C, Ketchum, W, Kim, Y K, Krop, D, Kwang, S, Lee, H S, Paramonov, A A, Schmidt, M A, Shiraishi, S, and Shochet, M. Mon .  
        "Search for WW and WZ production in lepton plus jets final state at CDF".  United States.  https://doi.org/10.1103/PHYSREVD.79.112011.

Copy to clipboard


                    
@article{osti_21296419,

  title        = {Search for WW and WZ production in lepton plus jets final state at CDF},

  author       = {Aaltonen, T and Maki, T and Mehtala, P and Orava, R and Osterberg, K and Saarikko, H and Remortel, N van and Adelman, J and Brubaker, E and Fedorko, W T and Grosso-Pilcher, C and Ketchum, W and Kim, Y K and Krop, D and Kwang, S and Lee, H S and Paramonov, A A and Schmidt, M A and Shiraishi, S and Shochet, M},

  abstractNote = {We present a search for WW and WZ production in final states that contain a charged lepton (electron or muon) and at least two jets, produced in {radical}(s)=1.96 TeV pp collisions at the Fermilab Tevatron, using data corresponding to 1.2 fb{sup -1} of integrated luminosity collected with the CDF II detector. Diboson production in this decay channel has yet to be observed at hadron colliders due to the large single W plus jets background. An artificial neural network has been developed to increase signal sensitivity, as compared with an event selection based on conventional cuts. We set a 95% confidence level upper limit of {sigma}{sub WW}xBR(W{yields}l{nu}{sub l},W{yields}jets)+{sigma}{sub WZ}xBR(W{yields}l{nu}{sub l},Z{yields}jets)<2.88 pb, which is consistent with the standard model next-to-leading-order cross section calculation for this decay channel of 2.09{+-}0.12 pb.},

  doi          = {10.1103/PHYSREVD.79.112011},

  url          = {https://www.osti.gov/biblio/21296419},
  journal      = {Physical Review. D, Particles Fields},

  issn         = {0556-2821},

  number       = 11,

  volume       = 79,

  place        = {United States},

  year         = {2009},

  month        = {6}

}

Copy to clipboard

Journal Article:

https://doi.org/10.1103/PHYSREVD.79.112011

Other availability

Find in Google Scholar

Search WorldCat to find libraries that may hold this journal

Save / Share:

Export Metadata

Save to My Library

Similar records in OSTI.GOV collections:

Search for WW and WZ production in lepton, neutrino plus jets final states at CDF Run II and Silicon module production and detector control system for the ATLAS SemiConductor Tracker

Thesis/Dissertation Sfyrla, Anna

In the first part of this work, we present a search for WW and WZ production in charged lepton, neutrino plus jets final states produced in p$$\bar{p}$$ collisions with √s = 1.96 TeV at the Fermilab Tevatron, using 1.2 fb ^-1 of data accumulated with the CDF II detector. This channel is yet to be observed in hadron colliders due to the large singleWplus jets background. However, this decay mode has a much larger branching fraction than the cleaner fully leptonic mode making it more sensitive to anomalous triple gauge couplings that manifest themselves at higher transverse W momentum. Becausemore »« less
https://doi.org/10.2172/935479

Full Text Available
Measurement of WW and WZ production in the lepton plus heavy flavor jets final state at CDF

Conference Leone, Sandra

We present the CDF measurement of the diboson WW and WZ production cross section in a final state consistent with leptonic W decay and jets originating from heavy flavor quarks, based on the full Tevatron Run II dataset. The analysis of the di–jet invariant mass spectrum allows the observation of 3.7 sigma evidence for the combined production processes of either WW or WZ bosons. The different heavy flavor decay pattern of the W and Z bosons and the analysis of the secondary–decay vertex properties allow to independently measure the WW and WZ production cross section in a hadronic final state.more »« less
Full Text Available
Evidence for $$WZ/WW\to \ell \nu$$ + Heavy Flavors Vector Boson Production in 7.5 fb$$^{-1}$$ of CDF Data

Conference Sforza, Federico ; /INFN, Pisa /Pisa U.

This contribution describes a search for the associated production of Standard Model vector bosons WZ where the W boson decays leptonically (W {yields} {ell}{nu}) and the Z boson decays to a heavy flavor quark pair (Z {yields} b{bar b}, c{bar c}). At least one identified ('tagged') heavy flavor jet in the final state is required. Given the small di-jet invariant mass separation between the W and the Z resonances, the production of WW events where one W decays leptonically and the second W decays into an heavy flavor jet (e.i. W{sup + {yields} c{bar s}) contributes to our the signal.more »« less
Search for $$p \bar{p} \rightarrow WZ \rightarrow l\nu_l b \bar{b}$$ signal with the CDF experiment at Tevatron

Technical Report Pani, Priscilla ; /Rome U. /INFN, Rome

The high energy physics has made huge steps forward the comprehension of the inner most nature of our universe and the matter we are composed of. The experimental discoveries, and the theories of the last 50 years that the experimental discoveries had confirmed or inspired, made possible to build a theory of the interactions. Weak interactions have been discovered and unified with the Electromagnetic ones in the Standard Model, which is the most widely experimentally tested and confirmed model of this century. The only prediction which is still unconfirmed is the existence of a particle, the Higgs boson, which providesmore »« less
https://doi.org/10.2172/984600

Full Text Available
Measurement of WW + WZ production cross section and study of the dijet mass spectrum in the ℓν + jets final state at CDF

Thesis/Dissertation Cavaliere, Viviana

We present the measurement of the WW and WZ production cross section in p$$\bar{p}$$ collisions at √s = 1.96 TeV, in a final state consisting of an electron or muon, neutrino and jets. The data analyzed were collected by the CDF II detector at the Tevatron collider and correspond to 4.3 fb ^-1 of integrated luminosity. The analysis uses a fit to the dijet mass distribution to extract the diboson contribution. We observe 1582 ± 275(stat.) ± 107(syst.) diboson candidate events and measure a cross section of σ _WW/WZ = 18.1 ± 3.3(stat.) ± 2.5(syst.) pb, consistent with the Standardmore »« less
https://doi.org/10.2172/1007274

Full Text Available

Similar Records