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Confronting dark matter with the diphoton excess from a parent resonance decay
A diphoton excess with an invariant mass of about 750 GeV has been recently reported by both ATLAS and CMS experiments at LHC. While the simplest interpretation requires the resonant production of a 750 GeV (pseudo)scalar, here we consider an alternative setup, with an additional heavy parent partic...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Springer Berlin Heidelberg
2016
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5321254/ https://www.ncbi.nlm.nih.gov/pubmed/28280430 http://dx.doi.org/10.1140/epjc/s10052-016-4116-7 |
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author | De Romeri, Valentina Kim, Jong Soo Martín-Lozano, Víctor Rolbiecki, Krzysztof de Austri, Roberto Ruiz |
author_facet | De Romeri, Valentina Kim, Jong Soo Martín-Lozano, Víctor Rolbiecki, Krzysztof de Austri, Roberto Ruiz |
author_sort | De Romeri, Valentina |
collection | PubMed |
description | A diphoton excess with an invariant mass of about 750 GeV has been recently reported by both ATLAS and CMS experiments at LHC. While the simplest interpretation requires the resonant production of a 750 GeV (pseudo)scalar, here we consider an alternative setup, with an additional heavy parent particle which decays into a pair of 750 GeV resonances. This configuration improves the agreement between the 8 and 13 TeV data. Moreover, we include a dark matter candidate in the form of a Majorana fermion which interacts through the 750 GeV portal. The invisible decays of the light resonance help to suppress additional decay channels into Standard Model particles in association with the diphoton signal. We realise our hierarchical framework in the context of an effective theory, and we analyse the diphoton signal as well as the consistency with other LHC searches. We finally address the interplay of the LHC results with the dark matter phenomenology, namely the compatibility with the relic density abundance and the indirect detection bounds. |
format | Online Article Text |
id | pubmed-5321254 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2016 |
publisher | Springer Berlin Heidelberg |
record_format | MEDLINE/PubMed |
spelling | pubmed-53212542017-03-07 Confronting dark matter with the diphoton excess from a parent resonance decay De Romeri, Valentina Kim, Jong Soo Martín-Lozano, Víctor Rolbiecki, Krzysztof de Austri, Roberto Ruiz Eur Phys J C Part Fields Regular Article - Theoretical Physics A diphoton excess with an invariant mass of about 750 GeV has been recently reported by both ATLAS and CMS experiments at LHC. While the simplest interpretation requires the resonant production of a 750 GeV (pseudo)scalar, here we consider an alternative setup, with an additional heavy parent particle which decays into a pair of 750 GeV resonances. This configuration improves the agreement between the 8 and 13 TeV data. Moreover, we include a dark matter candidate in the form of a Majorana fermion which interacts through the 750 GeV portal. The invisible decays of the light resonance help to suppress additional decay channels into Standard Model particles in association with the diphoton signal. We realise our hierarchical framework in the context of an effective theory, and we analyse the diphoton signal as well as the consistency with other LHC searches. We finally address the interplay of the LHC results with the dark matter phenomenology, namely the compatibility with the relic density abundance and the indirect detection bounds. Springer Berlin Heidelberg 2016-05-11 2016 /pmc/articles/PMC5321254/ /pubmed/28280430 http://dx.doi.org/10.1140/epjc/s10052-016-4116-7 Text en © The Author(s) 2016 Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. Funded by SCOAP3. |
spellingShingle | Regular Article - Theoretical Physics De Romeri, Valentina Kim, Jong Soo Martín-Lozano, Víctor Rolbiecki, Krzysztof de Austri, Roberto Ruiz Confronting dark matter with the diphoton excess from a parent resonance decay |
title | Confronting dark matter with the diphoton excess from a parent resonance decay |
title_full | Confronting dark matter with the diphoton excess from a parent resonance decay |
title_fullStr | Confronting dark matter with the diphoton excess from a parent resonance decay |
title_full_unstemmed | Confronting dark matter with the diphoton excess from a parent resonance decay |
title_short | Confronting dark matter with the diphoton excess from a parent resonance decay |
title_sort | confronting dark matter with the diphoton excess from a parent resonance decay |
topic | Regular Article - Theoretical Physics |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5321254/ https://www.ncbi.nlm.nih.gov/pubmed/28280430 http://dx.doi.org/10.1140/epjc/s10052-016-4116-7 |
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