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.journal","Reports on Progress in Physics"],["dc.contributor.author","Billard, Julien"],["dc.contributor.author","Boulay, Mark"],["dc.contributor.author","Cebrian, S"],["dc.contributor.author","Covi, Laura"],["dc.contributor.author","Fiorillo, Giuliana"],["dc.contributor.author","Green, Anne M"],["dc.contributor.author","Kopp, Joachim"],["dc.contributor.author","Majorovits, Bela"],["dc.contributor.author","Palladino, Kimberly"],["dc.contributor.author","Petricca, Federica"],["dc.contributor.author","Schumann, Marc"],["dc.date.accessioned","2022-04-01T10:02:48Z"],["dc.date.available","2022-04-01T10:02:48Z"],["dc.date.issued","2022"],["dc.description.abstract","Abstract This Report provides an extensive review of the experimental programme of direct detection searches of particle dark matter. It focuses mostly on European efforts, both current and planned, but does it within a broader context of a worldwide activity in the field. It aims at identifying the virtues, opportunities and challenges associated with the different experimental approaches and search techniques. It presents scientific and technological synergies, both ex- isting and emerging, with some other areas of particle physics, notably collider and neutrino programmes, and beyond. It addresses the issue of infrastructure in light of the growing needs and challenges of the different experimental searches. Finally, the Report makes a number of recommendations from the perspective of a long-term future of the field. They are introduced, along with some justification, in the opening Overview and Recommendations section and are next summarised at the end of the Report. Overall, we recommend that the direct search for dark matter particle interactions with a detector target should be given top priority in astroparticle physics, and in all particle physics, and beyond, as a positive measurement will provide the most unambiguous confirmation of the particle nature of dark matter in the Universe."],["dc.identifier.doi","10.1088/1361-6633/ac5754"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/106008"],["dc.notes.intern","DOI-Import GROB-530"],["dc.relation.eissn","1361-6633"],["dc.relation.issn","0034-4885"],["dc.title","Direct Detection of Dark Matter – APPEC Committee Report "],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["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.issue","11"],["dc.bibliographiccitation.journal","Physical Review D"],["dc.bibliographiccitation.volume","98"],["dc.contributor.author","Binder, Tobias"],["dc.contributor.author","Covi, Laura"],["dc.contributor.author","Mukaida, Kyohei"],["dc.date.accessioned","2020-12-10T18:25:30Z"],["dc.date.available","2020-12-10T18:25:30Z"],["dc.date.issued","2018"],["dc.identifier.doi","10.1103/PhysRevD.98.115023"],["dc.identifier.eissn","2470-0029"],["dc.identifier.issn","2470-0010"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/75719"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-354"],["dc.title","Dark matter Sommerfeld-enhanced annihilation and bound-state decay at finite temperature"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","002"],["dc.bibliographiccitation.issue","02"],["dc.bibliographiccitation.journal","Journal of Cosmology and Astroparticle Physics"],["dc.bibliographiccitation.lastpage","002"],["dc.bibliographiccitation.volume","2018"],["dc.contributor.author","Biswas, Anirban"],["dc.contributor.author","Choubey, Sandhya"],["dc.contributor.author","Covi, Laura"],["dc.contributor.author","Khan, Sarif"],["dc.date.accessioned","2020-12-10T18:15:49Z"],["dc.date.available","2020-12-10T18:15:49Z"],["dc.date.issued","2018"],["dc.identifier.doi","10.1088/1475-7516/2018/02/002"],["dc.identifier.eissn","1475-7516"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/74962"],["dc.notes.intern","DOI Import GROB-354"],["dc.title","Explaining the 3.5 keV X-ray line in a L μ − L τ extension of the inert doublet model"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","2225"],["dc.bibliographiccitation.issue","12"],["dc.bibliographiccitation.journal","Acta Physica Polonica B"],["dc.bibliographiccitation.lastpage","2236"],["dc.bibliographiccitation.volume","43"],["dc.contributor.author","Covi, Laura"],["dc.date.accessioned","2018-11-07T09:02:29Z"],["dc.date.available","2018-11-07T09:02:29Z"],["dc.date.issued","2012"],["dc.description.abstract","We will review models of Dark Matter, where the particle interacts much more weakly than weak, also called SuperWIMPs or E-WIMPs models. One particularly very well known candidate of this type is the gravitino, but also other well-motivated particles are the axino, a sterile neutrino or a particle of the hidden sector with GUT suppressed interaction with normal matter, etc. These candidates have a very different phenomenology than candidates of the weakly interacting type, i.e. WIMPs (Weakly-Interacting Massive Particles), but they can still be produced in cosmology in sufficient number to provide the measured Dark Matter density. Moreover, if they are connected to a larger sector of SM-charged new particles, like in the case of supersymmetric models, they can provide interesting alternative signatures at colliders. DOI:10.5506/APhysPolB.43.2225"],["dc.identifier.doi","10.5506/APhysPolB.43.2225"],["dc.identifier.isi","000314615100004"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/24694"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Wydawnictwo Uniwersytetu Jagiellonskiego"],["dc.publisher.place","Krakow"],["dc.relation.conference","52nd Conference on Astroparticle Physics in the LHC Era of Cracow-School-of-Theoretical-Physics"],["dc.relation.eventlocation","Zakopane, POLAND"],["dc.relation.issn","0587-4254"],["dc.title","GRAVITINO AND SUPERWIMPS IN COSMOLOGY"],["dc.type","conference_paper"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","123524"],["dc.bibliographiccitation.issue","12"],["dc.bibliographiccitation.journal","PHYSICAL REVIEW D"],["dc.bibliographiccitation.volume","91"],["dc.contributor.author","Catena, Riccardo"],["dc.contributor.author","Covi, Laura"],["dc.contributor.author","Emken, Timon"],["dc.date.accessioned","2018-11-07T09:55:50Z"],["dc.date.available","2018-11-07T09:55:50Z"],["dc.date.issued","2015"],["dc.description.abstract","We revisit astrophysical constraints on models with an ultralight gravitino, in particular extending the analysis to more general models and the case of R-parity breaking. These constraints allow us to restrict the value of the gravitino mass depending on the masses of scalar moduli. We perform both a frequentist and a Bayesian analysis and we find comparable results, even if the Bayesian analysis is in part affected by volume effects. Only a small window of gravitino masses can be excluded by the supernova constraints in a model-independent way, while limits obtained with a definite assumption on the scalar masses are more stringent."],["dc.identifier.doi","10.1103/PhysRevD.91.123524"],["dc.identifier.isi","000356405900002"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/36834"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Amer Physical Soc"],["dc.relation.issn","1550-2368"],["dc.relation.issn","1550-7998"],["dc.title","Model independent limits on an ultralight gravitino from supernovae"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]