Mañana, JUEVES, 24 DE ABRIL, el sistema se apagará debido a tareas habituales de mantenimiento a partir de las 9 de la mañana. Lamentamos las molestias.
Confronting dark matter with the diphoton excess from a parent resonance decay
Entity
UAM. Departamento de Física TeóricaPublisher
Springer New York LLCDate
2016-05-11Citation
10.1140/epjc/s10052-016-4116-7
The European Physical Journal C 76.5 (2016): 262
ISSN
1434-6044 (print); 1434-6052 (online)DOI
10.1140/epjc/s10052-016-4116-7Funded by
The authors acknowledge support by the Spanish MINECO through the Centro de Excelencia Severo Ochoa Program under Grant SEV-2012-0249, by the Consolider-Ingenio 2010 programme under Grant MULTIDARK CSD2009-00064 and by the Invisibles European ITN project FP7-PEOPLE-2011-ITN, PITN-GA-2011-289442- INVISIBLES. VDR acknowledges support by the Spanish MINECO through the project FPA2012-31880 (P.I. Enrique Alvarez Vazquez). VML would like to thank the support by the Spanish MICINN under GrantNo. FPA2015-65929-P and the ERCAdvanced Grant SPLE under contract ERC-2012-ADG-20120216-320421. J.S.K. has been partially supported by the MINECO (Spain) under contract FPA2013-44773-P and the Consolider-Ingenio CPAN CSD2007-00042. R. RdA is supported by the Ramón y Cajal program of the Spanish MICINN and also thanks the support by the “SOM Sabor y origen de la Materia” (FPA2011-29678), the “Fenomenologia y Cosmologia de la Física mas allá del Modelo Estándar e lmplicaciones Experimentales en la era del LHC”(FPA2010-17747) MEC projects and the SeveroOchoa MINECO project SEV-2014-0398Project
Gobierno de España. SEV-2012-0249; Gobierno de España. FPA2012-31880; Gobierno de España. FPA2015-65929-P; Gobierno de España. FPA2013-44773-P; Gobierno de España. FPA2011-29678; Gobierno de España. SEV-2014-0398; info:eu-repo/grantAgreement/EC/FP7/289442; info:eu-repo/grantAgreement/EC/FP7/320421; Gobierno de España. CSD2009-00064; Gobierno de España. CSD2007-00042; Gobierno de España. FPA2010-17747Editor's Version
http://dx.doi.org/10.1140/epjc/s10052-016-4116-7Subjects
FísicaRights
© 2016, The Author(s)Abstract
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
Files in this item
Google Scholar:De Romeri, V.
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Soo Kim, J.
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Martín-Lozano, V.
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Rolbiecki, K.
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Ruiz de Austri, Roberto
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