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  "authors": [
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          "value": "National Centre for Nuclear Research, ul. Pasteura 7, Warsaw, 02-093, Poland", 
          "organization": "National Centre for Nuclear Research"
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      "surname": "Darm\u00e9", 
      "email": "luc.darme@ncbj.gov.pl", 
      "full_name": "Darm\u00e9, L.", 
      "given_names": "L."
    }, 
    {
      "affiliations": [
        {
          "country": "Poland", 
          "value": "National Centre for Nuclear Research, ul. Pasteura 7, Warsaw, 02-093, Poland", 
          "organization": "National Centre for Nuclear Research"
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      "surname": "Hryczuk", 
      "email": "andrzej.hryczuk@ncbj.gov.pl", 
      "full_name": "Hryczuk, A.", 
      "given_names": "A."
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    {
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          "country": "Poland", 
          "value": "National Centre for Nuclear Research, ul. Pasteura 7, Warsaw, 02-093, Poland", 
          "organization": "National Centre for Nuclear Research"
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      ], 
      "surname": "Karamitros", 
      "email": "dimitrios.karamitros@ncbj.gov.pl", 
      "full_name": "Karamitros, D.", 
      "given_names": "D."
    }, 
    {
      "affiliations": [
        {
          "country": "Poland", 
          "value": "Astrocent, Nicolaus Copernicus Astronomical Center Polish Academy of Sciences, Bartycka 18, Warsaw, 00-716, Poland", 
          "organization": "Astrocent, Nicolaus Copernicus Astronomical Center Polish Academy of Sciences"
        }, 
        {
          "country": "Poland", 
          "value": "National Centre for Nuclear Research, ul. Pasteura 7, Warsaw, 02-093, Poland", 
          "organization": "National Centre for Nuclear Research"
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      "surname": "Roszkowski", 
      "email": "leszek.roszkowski@ncbj.gov.pl", 
      "full_name": "Roszkowski, L.", 
      "given_names": "L."
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  ], 
  "titles": [
    {
      "source": "Springer", 
      "title": "Forbidden frozen-in dark matter"
    }
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  "dois": [
    {
      "value": "10.1007/JHEP11(2019)159"
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      "journal_title": "Journal of High Energy Physics", 
      "material": "article", 
      "journal_volume": "2019", 
      "artid": "JHEP11(2019)159", 
      "year": 2019, 
      "page_start": "1", 
      "journal_issue": "11"
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  "copyright": [
    {
      "holder": "The Author(s)", 
      "year": "2019"
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  "abstracts": [
    {
      "source": "Springer", 
      "value": "We examine and point out the importance of a regime of dark matter pro- duction through the freeze-in mechanism that results from a large thermal correction to a decaying mediator particle mass from hot plasma in the early Universe. We show that mediator decays to dark matter that are kinematically forbidden at the usually considered ranges of low temperatures can be generically present at higher temperatures and actually dominate the overall dark matter production, thus leading to very distinct solutions from the standard case. We illustrate these features by considering a dark Higgs portal model where dark matter is produced via decays of a scalar field with a large thermal mass. We identify the resulting ranges of parameters that are consistent with the correct dark matter relic abundance and further apply current and expected future collider, cosmological, and astrophysical limits."
    }
  ], 
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