{
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  "authors": [
    {
      "affiliations": [
        {
          "country": "Israel", 
          "value": "Physics Department, Technion \u2014 Israel Institute of Technology, Technion city, Haifa, 3200003, Israel", 
          "organization": "Physics Department, Technion \u2014 Israel Institute of Technology"
        }
      ], 
      "surname": "Liu", 
      "email": "liu.hongkai@campus.technion.ac.il", 
      "full_name": "Liu, Hongkai", 
      "given_names": "Hongkai"
    }, 
    {
      "affiliations": [
        {
          "country": "Israel", 
          "value": "Physics Department, Technion \u2014 Israel Institute of Technology, Technion city, Haifa, 3200003, Israel", 
          "organization": "Physics Department, Technion \u2014 Israel Institute of Technology"
        }, 
        {
          "country": "Spain", 
          "value": "Department of Physics and IFAE-BIST, Universitat Aut\u00f2noma de Barcelona, E-08193 Bellaterra, Barcelona, Spain", 
          "organization": "Universitat Aut\u00f2noma de Barcelona"
        }
      ], 
      "surname": "Ma", 
      "email": "tma@ifae.es", 
      "full_name": "Ma, Teng", 
      "given_names": "Teng"
    }, 
    {
      "affiliations": [
        {
          "country": "Israel", 
          "value": "Physics Department, Technion \u2014 Israel Institute of Technology, Technion city, Haifa, 3200003, Israel", 
          "organization": "Physics Department, Technion \u2014 Israel Institute of Technology"
        }
      ], 
      "surname": "Shadmi", 
      "email": "yshadmi@physics.technion.ac.il", 
      "full_name": "Shadmi, Yael", 
      "given_names": "Yael"
    }, 
    {
      "affiliations": [
        {
          "country": "Israel", 
          "value": "Physics Department, Technion \u2014 Israel Institute of Technology, Technion city, Haifa, 3200003, Israel", 
          "organization": "Physics Department, Technion \u2014 Israel Institute of Technology"
        }
      ], 
      "surname": "Waterbury", 
      "email": "mwaterbury@campus.technion.ac.il", 
      "full_name": "Waterbury, Michael", 
      "given_names": "Michael"
    }
  ], 
  "titles": [
    {
      "source": "Springer", 
      "title": "An EFT hunter\u2019s guide to two-to-two scattering: HEFT and SMEFT on-shell amplitudes"
    }
  ], 
  "dois": [
    {
      "value": "10.1007/JHEP05(2023)241"
    }
  ], 
  "publication_info": [
    {
      "page_end": "33", 
      "journal_title": "Journal of High Energy Physics", 
      "material": "article", 
      "journal_volume": "2023", 
      "artid": "JHEP05(2023)241", 
      "year": 2023, 
      "page_start": "1", 
      "journal_issue": "5"
    }
  ], 
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    "source": "Springer", 
    "method": "Springer", 
    "submission_number": "5c13f3c8421511ee91ac6ee2827c7def"
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  "page_nr": [
    33
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  "license": [
    {
      "url": "https://creativecommons.org/licenses//by/4.0", 
      "license": "CC-BY-4.0"
    }
  ], 
  "copyright": [
    {
      "holder": "The Author(s)", 
      "year": "2023"
    }
  ], 
  "control_number": "78003", 
  "record_creation_date": "2023-05-31T18:30:11.395138", 
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  "collections": [
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      "primary": "Journal of High Energy Physics"
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  "arxiv_eprints": [
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      "categories": [
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      "value": "2301.11349"
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  ], 
  "abstracts": [
    {
      "source": "Springer", 
      "value": "We derive the contact terms contributing to the four-point amplitudes of the standard model particles, keeping terms with up to quartic energy growth. Imposing just the unbroken low-energy symmetry, and treating the electroweak gauge bosons and the Higgs as independent degrees of freedom, we obtain the most general four-point contact-term amplitudes, corresponding to the Higgs Effective Field Theory (HEFT) framework. The contact terms are spanned by a basis of Stripped Contact Terms, which carry the polarization information, multiplied by polynomials in the Mandelstam invariants. For terms with quadratic energy growth, we also derive the low-energy Standard Model Effective Field Theory (SMEFT) predictions, via on-shell Higgsing of the massless SMEFT contact terms. We discuss several aspects of bottom-up versus top-down on-shell derivations of the HEFT and SMEFT amplitudes, highlighting in particular the simple counting of HEFT dimensions in the on-shell approach and the transparent relation between perturbative unitarity and gauge-invariance in the little-group covariant massive spinor formalism. Our results provide a formulation of Effective Field Theory analyses directly in terms of observable quantities. For terms with quadratic energy growth, we also provide the mapping to the Warsaw basis."
    }
  ], 
  "imprints": [
    {
      "date": "2023-05-31", 
      "publisher": "Springer"
    }
  ]
}