Covi, Laura

[["dc.bibliographiccitation.artnumber","115006"],["dc.bibliographiccitation.issue","11"],["dc.bibliographiccitation.journal","PHYSICAL REVIEW D"],["dc.bibliographiccitation.volume","92"],["dc.contributor.author","Arcadi, Giorgio"],["dc.contributor.author","Covi, Laura"],["dc.contributor.author","Nardecchia, Marco"],["dc.date.accessioned","2018-11-07T09:47:35Z"],["dc.date.available","2018-11-07T09:47:35Z"],["dc.date.issued","2015"],["dc.description.abstract","A very simple way to obtain comparable baryon and dark matter densities in the early Universe is through their contemporary production from the out-of-equilibrium decay of a mother particle, if both populations are suppressed by comparably small numbers, i.e., the CP violation in the decay and the branching fraction, respectively. We present a detailed study of this kind of scenario in the context of an R-parity violating realization of the minimal supersymmetric standard model in which the baryon asymmetry and the gravitino dark matter are produced by the decay of a Bino. A quantitative determination, in a realistic particle physics framework, of these two quantities is quite involving, due to the non trivial determination of the abundance of the decaying Bino, as well as due to the impact of wash-out processes and of additional sources both for the baryon asymmetry and the DM relic density. To achieve a quantitative determination of the baryon and dark matter abundances, we have implemented and solved a system of coupled Boltzmann equations for the particle species involved in their generation, including all the relevant processes. In the most simple, but still general, limit, in which the processes determining the abundance and the decay rate of the Bino are mediated by degenerate right-handed squarks, the correct values of the dark matter and baryon relic densities are achieved for a Bino mass between 50 and 100 TeV, Gluino next-to-lightest supersymmetric particle mass in the range 15-60 TeV, and a gravitino mass between 100 GeV and few TeV. These high masses are unfortunately beyond the kinematical reach of the LHC. On the contrary, an antiproton signal from the decays of the gravitino lightest supersymmetric particle might be within the sensibility of AMS-02 and gamma-ray telescopes."],["dc.description.sponsorship","European Union [PITNGA-2011-289442]"],["dc.identifier.doi","10.1103/PhysRevD.92.115006"],["dc.identifier.isi","000366096200005"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/35145"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Amer Physical Soc"],["dc.relation.issn","2470-0029"],["dc.relation.issn","2470-0010"],["dc.title","Gravitino dark matter and low-scale baryogenesis"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","063"],["dc.bibliographiccitation.issue","10"],["dc.bibliographiccitation.journal","Journal of Cosmology and Astroparticle Physics"],["dc.contributor.author","Arcadi, Giorgio"],["dc.contributor.author","Covi, Laura"],["dc.contributor.author","Dradi, Federico"],["dc.date.accessioned","2018-11-07T09:33:55Z"],["dc.date.available","2018-11-07T09:33:55Z"],["dc.date.issued","2014"],["dc.description.abstract","We study the possible signals at LHC of the minimal models of decaying dark matter. Those models are characterized by the fact that DM interacts with SM particles through renormalizable coupling with an additional heavier charged state. Such interaction allows to produce a substantial abundance of DM in the early Universe via the decay of the charged heavy state, either in- or out-of-equilibrium. Moreover additional couplings of the charged particle open up decay channels for the DM, which can nevertheless be sufficiently long-lived to be a good DM candidate and within reach of future Indirect Detection observations. We compare the cosmologically favored parameter regions to the LHC discovery reach and discuss the possibility of simultaneous detection of DM decay in Indirect Detection."],["dc.description.sponsorship","European Union [PITN-GA-2011-289442]"],["dc.identifier.doi","10.1088/1475-7516/2014/10/063"],["dc.identifier.fs","606275"],["dc.identifier.isi","000345990800064"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/11478"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/32068"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Iop Publishing Ltd"],["dc.relation","info:eu-repo/grantAgreement/EC/FP7/289442/EU//INVISIBLES"],["dc.relation.issn","1475-7516"],["dc.relation.orgunit","Fakultät für Physik"],["dc.rights","CC BY 3.0"],["dc.title","LHC prospects for minimal decaying dark matter"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","005"],["dc.bibliographiccitation.issue","8"],["dc.bibliographiccitation.journal","Journal of Cosmology and Astroparticle Physics"],["dc.contributor.author","Arcadi, Giorgio"],["dc.contributor.author","Covi, Laura"],["dc.date.accessioned","2018-11-07T09:21:43Z"],["dc.date.available","2018-11-07T09:21:43Z"],["dc.date.issued","2013"],["dc.description.abstract","We consider a minimal Dark Matter model with just two additional states, a Dark Matter Majorana fermion and a colored or electroweakly charged scalar, without introducing any symmetry to stabilize the DM state. We identify the parameter region where an indirect DM signal would be within the reach of future observations and the DM relic density generated fits the observations. We find in this way two possible regions in the parameter space, corresponding to a FIMP/SuperWIMP or a WIMP DM. We point out the different collider signals of this scenario and how it will be possible to measure the different couplings in case of a combined detection."],["dc.description.sponsorship","European Union [PITN-GA-2011-289442]"],["dc.identifier.doi","10.1088/1475-7516/2013/08/005"],["dc.identifier.isi","000324032800008"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/29175"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Iop Publishing Ltd"],["dc.relation.issn","1475-7516"],["dc.title","Minimal decaying Dark Matter and the LHC"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","023"],["dc.bibliographiccitation.issue","7"],["dc.bibliographiccitation.journal","Journal of Cosmology and Astroparticle Physics"],["dc.contributor.author","Arcadi, Giorgio"],["dc.contributor.author","Covi, Laura"],["dc.contributor.author","Dradi, Federico"],["dc.date.accessioned","2018-11-07T09:54:57Z"],["dc.date.available","2018-11-07T09:54:57Z"],["dc.date.issued","2015"],["dc.description.abstract","We investigate the possibility of reproducing the recently reported 3.55 keV line in some simple decaying dark matter scenarios. In all cases a keV scale decaying DM is coupled with a scalar field charged under SM gauge interactions and thus capable of pair production at the LHC. We will investigate how the demand of a DM lifetime compatible with the observed signal, combined with the requirement of the correct DM relic density through the freeze-in mechanism, impacts the prospects of observation at the LHC of the decays of the scalar field."],["dc.description.sponsorship","ERC advanced grant Higgs@LHC; European Union [PITN-GA-2011-289442]"],["dc.identifier.doi","10.1088/1475-7516/2015/07/023"],["dc.identifier.fs","614264"],["dc.identifier.isi","000359259500023"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/12078"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/36649"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Iop Publishing Ltd"],["dc.relation","info:eu-repo/grantAgreement/EC/FP7/289442/EU//INVISIBLES"],["dc.relation.issn","1475-7516"],["dc.relation.orgunit","Fakultät für Physik"],["dc.rights","CC BY 3.0"],["dc.title","3.55 keV line in minimal decaying dark matter scenarios"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]