Diboson excesses demystified in effective field theory approach

Hyun Min Lee; Doojin Kim; Kyoungchul Kong; Seong Chan Park

doi:10.1007/JHEP11(2015)150

Diboson excesses demystified in effective field theory approach

Hyun Min Lee, Doojin Kim, Kyoungchul Kong, Seong Chan Park

Department of Physics

Research output: Contribution to journal › Article › peer-review

23 Citations (Scopus)

Abstract

Abstract: We study the collider implication of a neutral resonance which decays to several diboson final states such as W⁺W⁻, ZZ, and Zγ via a minimal set of effective operators. We consider both CP-even and CP-odd bosonic states with spin 0, 1, or 2. The production cross sections for the bosonic resonance states are obtained with the effective operators involving gluons (and quarks), and the branching fractions are obtained with the operators responsible for the interactions with electroweak gauge bosons. We demonstrate that each scenario allows for a broad parameter space which could accommodate the recently-reported intriguing excesses in the ATLAS diboson final states, and discuss how the CP states and spin information of the resonance can be extracted at the LHC run II.

Original language	English
Article number	150
Pages (from-to)	1-24
Number of pages	24
Journal	Journal of High Energy Physics
Volume	2015
Issue number	11
DOIs	https://doi.org/10.1007/JHEP11(2015)150
Publication status	Published - 2015 Nov 1

Bibliographical note

Publisher Copyright:
© 2015, The Author(s).

All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics

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10.1007/JHEP11(2015)150

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AB - Abstract: We study the collider implication of a neutral resonance which decays to several diboson final states such as W+W−, ZZ, and Zγ via a minimal set of effective operators. We consider both CP-even and CP-odd bosonic states with spin 0, 1, or 2. The production cross sections for the bosonic resonance states are obtained with the effective operators involving gluons (and quarks), and the branching fractions are obtained with the operators responsible for the interactions with electroweak gauge bosons. We demonstrate that each scenario allows for a broad parameter space which could accommodate the recently-reported intriguing excesses in the ATLAS diboson final states, and discuss how the CP states and spin information of the resonance can be extracted at the LHC run II.

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Diboson excesses demystified in effective field theory approach

Abstract

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