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Title: Searching for new heavy neutral gauge bosons using vector boson fusion processes at the LHC

Here, new massive resonances are predicted in many extensions to the Standard Model (SM) of particle physics and constitutes one of the most promising searches for new physics at the LHC. We present a feasibility study to search for new heavy neutral gauge bosons using vector boson fusion (VBF) processes, which become especially important as the LHC probes higher collision energies. In particular, we consider the possibility that the discovery of a Z' boson may have eluded searches at the LHC. The coupling of the Z' boson to the SM quarks can be small, and thus the Z' would not be discoverable by the searches conducted thus far. In the context of a simplified phenomenological approach, we consider the Z'→ττ and Z'→μμ decay modes to show that the requirement of a dilepton pair combined with two high p T forward jets with large separation in pseudorapidity and with large dijet mass is effective in reducing SM backgrounds. The expected exclusion bounds (at 95% confidence level) are m(Z') < 1.8 TeV and m(Z')<2.5 TeV in the ττj fj f and μμj fj f channels, respectively, assuming 1000 fb –1 of 13 TeV data from the LHC. The use of the VBFmore » topology to search for massive neutral gauge bosons provides a discovery reach with expected significances greater than 5σ (3σ) for Z' masses up to 1.4 (1.6) TeV and 2.0 (2.2) TeV in the ττj fj f and μμj fj f channels.« less
Authors:
ORCiD logo [1] ;  [2] ;  [2] ; ORCiD logo [3] ;  [2] ;  [2] ;  [2]
  1. Univ. de los Andes, Bogota (Columbia)
  2. Vanderbilt Univ., Nashville, TN (United States)
  3. Kyungpook National Univ., Deagu (Republic of Korea)
Publication Date:
Grant/Contract Number:
SC0011981
Type:
Published Article
Journal Name:
Physics Letters. Section B
Additional Journal Information:
Journal Volume: 767; Journal Issue: C; Journal ID: ISSN 0370-2693
Publisher:
Elsevier
Research Org:
Vanderbilt Univ., Nashville, TN (United States). Dept. of Physics and Astronomy
Sponsoring Org:
USDOE Office of Science (SC)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
OSTI Identifier:
1343167
Alternate Identifier(s):
OSTI ID: 1355926

Flórez, Andrés, Gurrola, Alfredo, Johns, Will, Oh, Young Do, Sheldon, Paul, Teague, Dylan, and Weiler, Thomas. Searching for new heavy neutral gauge bosons using vector boson fusion processes at the LHC. United States: N. p., Web. doi:10.1016/j.physletb.2017.01.062.
Flórez, Andrés, Gurrola, Alfredo, Johns, Will, Oh, Young Do, Sheldon, Paul, Teague, Dylan, & Weiler, Thomas. Searching for new heavy neutral gauge bosons using vector boson fusion processes at the LHC. United States. doi:10.1016/j.physletb.2017.01.062.
Flórez, Andrés, Gurrola, Alfredo, Johns, Will, Oh, Young Do, Sheldon, Paul, Teague, Dylan, and Weiler, Thomas. 2017. "Searching for new heavy neutral gauge bosons using vector boson fusion processes at the LHC". United States. doi:10.1016/j.physletb.2017.01.062.
@article{osti_1343167,
title = {Searching for new heavy neutral gauge bosons using vector boson fusion processes at the LHC},
author = {Flórez, Andrés and Gurrola, Alfredo and Johns, Will and Oh, Young Do and Sheldon, Paul and Teague, Dylan and Weiler, Thomas},
abstractNote = {Here, new massive resonances are predicted in many extensions to the Standard Model (SM) of particle physics and constitutes one of the most promising searches for new physics at the LHC. We present a feasibility study to search for new heavy neutral gauge bosons using vector boson fusion (VBF) processes, which become especially important as the LHC probes higher collision energies. In particular, we consider the possibility that the discovery of a Z' boson may have eluded searches at the LHC. The coupling of the Z' boson to the SM quarks can be small, and thus the Z' would not be discoverable by the searches conducted thus far. In the context of a simplified phenomenological approach, we consider the Z'→ττ and Z'→μμ decay modes to show that the requirement of a dilepton pair combined with two high pT forward jets with large separation in pseudorapidity and with large dijet mass is effective in reducing SM backgrounds. The expected exclusion bounds (at 95% confidence level) are m(Z') < 1.8 TeV and m(Z')<2.5 TeV in the ττjfjf and μμjfjf channels, respectively, assuming 1000 fb–1 of 13 TeV data from the LHC. The use of the VBF topology to search for massive neutral gauge bosons provides a discovery reach with expected significances greater than 5σ (3σ) for Z' masses up to 1.4 (1.6) TeV and 2.0 (2.2) TeV in the ττjfjf and μμjfjf channels.},
doi = {10.1016/j.physletb.2017.01.062},
journal = {Physics Letters. Section B},
number = C,
volume = 767,
place = {United States},
year = {2017},
month = {2}
}