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Title: A few words about resonances in the electroweak effective Lagrangian

Abstract

Contrary to a widely spread believe, we have demonstrated that strongly coupled electroweak models including both a light Higgs-like boson and massive spin-1 resonances are not in conflict with experimental constraints on the oblique S and T parameters. We use an effective Lagrangian implementing the chiral symmetry breaking SU (2){sub L} ⊗ SU (2){sub R} → SU (2){sub L+R} that contains the Standard Model gauge bosons coupled to the electroweak Goldstones, one Higgs-like scalar state h with mass m{sub h} = 126 GeV and the lightest vector and axial-vector resonance multiplets V and A. We have considered the one-loop calculation of S and T in order to study the viability of these strongly-coupled scenarios, being short-distance constraints and dispersive relations the main ingredients of the calculation. Once we have constrained the resonance parameters, we do a first approach to the determination of the low energy constants of the electroweak effective theory at low energies (without resonances). We show this determination in the case of the purely Higgsless bosonic Lagrangian.

Authors:
 [1]; ;  [2];  [3]
  1. Departamento de Ciencias Físicas, Matemáticas y de la Computación, Universidad CEU Cardenal Herrera, c/ Sant Bartomeu 55, 46115 Alfara del Patriarca, València (Spain)
  2. Departament de Física Teòrica, IFIC, Universitat de València – CSIC, Apt. Correus 22085, 46071 València (Spain)
  3. Departamento de Física Teórica and Instituto Física Teórica, IFT-UAM/CSIC, Universidad Autónoma de Madrid, Cantoblanco, 28049 Madrid (Spain)
Publication Date:
OSTI Identifier:
22499090
Resource Type:
Journal Article
Journal Name:
AIP Conference Proceedings
Additional Journal Information:
Journal Volume: 1701; Journal Issue: 1; Conference: 11. conference on quark confinement and hadron spectrum, Saint Petersburg (Russian Federation), 8-12 Sep 2014; Other Information: (c) 2016 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0094-243X
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; CHIRAL SYMMETRY; DISTANCE; GEV RANGE; HIGGS BOSONS; HIGGS MODEL; LAGRANGIAN FUNCTION; LIMITING VALUES; MULTIPLETS; RESONANCE; SPIN; STANDARD MODEL; SYMMETRY BREAKING; VECTORS; WEINBERG-SALAM GAUGE MODEL

Citation Formats

Rosell, Ignasi, Pich, Antonio, Santos, Joaquín, and Sanz-Cillero, Juan José. A few words about resonances in the electroweak effective Lagrangian. United States: N. p., 2016. Web. doi:10.1063/1.4938702.
Rosell, Ignasi, Pich, Antonio, Santos, Joaquín, & Sanz-Cillero, Juan José. A few words about resonances in the electroweak effective Lagrangian. United States. https://doi.org/10.1063/1.4938702
Rosell, Ignasi, Pich, Antonio, Santos, Joaquín, and Sanz-Cillero, Juan José. 2016. "A few words about resonances in the electroweak effective Lagrangian". United States. https://doi.org/10.1063/1.4938702.
@article{osti_22499090,
title = {A few words about resonances in the electroweak effective Lagrangian},
author = {Rosell, Ignasi and Pich, Antonio and Santos, Joaquín and Sanz-Cillero, Juan José},
abstractNote = {Contrary to a widely spread believe, we have demonstrated that strongly coupled electroweak models including both a light Higgs-like boson and massive spin-1 resonances are not in conflict with experimental constraints on the oblique S and T parameters. We use an effective Lagrangian implementing the chiral symmetry breaking SU (2){sub L} ⊗ SU (2){sub R} → SU (2){sub L+R} that contains the Standard Model gauge bosons coupled to the electroweak Goldstones, one Higgs-like scalar state h with mass m{sub h} = 126 GeV and the lightest vector and axial-vector resonance multiplets V and A. We have considered the one-loop calculation of S and T in order to study the viability of these strongly-coupled scenarios, being short-distance constraints and dispersive relations the main ingredients of the calculation. Once we have constrained the resonance parameters, we do a first approach to the determination of the low energy constants of the electroweak effective theory at low energies (without resonances). We show this determination in the case of the purely Higgsless bosonic Lagrangian.},
doi = {10.1063/1.4938702},
url = {https://www.osti.gov/biblio/22499090}, journal = {AIP Conference Proceedings},
issn = {0094-243X},
number = 1,
volume = 1701,
place = {United States},
year = {Fri Jan 22 00:00:00 EST 2016},
month = {Fri Jan 22 00:00:00 EST 2016}
}