{"work":{"id":"3c4fce21-0f4e-48a3-9678-a1e5dd137757","openalex_id":null,"doi":null,"arxiv_id":"hep-ph/0305261","raw_key":null,"title":"Scalar Dark Matter candidates","authors":null,"authors_text":"C","year":2003,"venue":"hep-ph","abstract":"We investigate the possibility that Dark Matter (dm) could be made of scalar candidates and focus, in particular, on the unusual mass range between a few MeV's and a few GeV's. After showing why the Lee-Weinberg limit (which usually forbids a dm mass below a few GeV's) does not necessarily apply in the case of scalar particles, we discuss how light candidates (mdm < O(GeV)) can satisfy both the gamma ray and relic density constraints. We find two possibilities. Either dm is coupled to heavy fermions (but if $mdm \\lesssim 100$ MeV, an asymmetry between the dm particle and antiparticle number densities is likely to be required), or dm is coupled to a new light gauge boson U. The (collisional) damping of light candidates is, in some circumstances, large enough to be mentioned, but in most cases too small to generate a non linear matter power spectrum at the present epoch that differs significantly from the Cold Dark Matter spectrum. On the other hand, heavier scalar dm particles (ie with $mdm \\gtrsim O(GeV)$) turn out to be much less constrained. We finally discuss a theoretical framework for scalar candidates, inspired from theories with N=2 extended supersymmetry and/or extra space dimensions, in which the dm stability results from a new discrete (or continuous) symmetry.","external_url":"https://arxiv.org/abs/hep-ph/0305261","cited_by_count":null,"metadata_source":"pith","metadata_fetched_at":"2026-05-23T04:42:34.569553+00:00","pith_arxiv_id":"hep-ph/0305261","created_at":"2026-05-10T09:23:37.733804+00:00","updated_at":"2026-06-05T21:23:00.469572+00:00","title_quality_ok":false,"display_title":"Scalar Dark Matter candidates","render_title":"Scalar Dark Matter candidates"},"hub":{"state":{"work_id":"3c4fce21-0f4e-48a3-9678-a1e5dd137757","tier":"hub","tier_reason":"10+ Pith inbound or 1,000+ external citations","pith_inbound_count":13,"external_cited_by_count":null,"distinct_field_count":4,"first_pith_cited_at":"2020-05-04T14:31:03+00:00","last_pith_cited_at":"2026-05-21T09:15:49+00:00","author_build_status":"not_needed","summary_status":"needed","contexts_status":"needed","graph_status":"needed","ask_index_status":"not_needed","reader_status":"not_needed","recognition_status":"not_needed","updated_at":"2026-06-20T01:08:48.139798+00:00","tier_text":"hub"},"tier":"hub","role_counts":[{"context_role":"background","n":9}],"polarity_counts":[{"context_polarity":"background","n":7},{"context_polarity":"unclear","n":2}],"runs":{},"summary":{},"graph":{},"authors":[]}}