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  "authors": [
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      "affiliations": [
        {
          "country": "USA", 
          "value": "Department of Physics, Boston University, Boston, MA, 02215, USA", 
          "organization": "Boston University"
        }
      ], 
      "surname": "Chen", 
      "email": "hbchen@bu.edu", 
      "full_name": "Chen, Hongbin", 
      "given_names": "Hongbin"
    }, 
    {
      "affiliations": [
        {
          "country": "USA", 
          "value": "Department of Physics, Boston University, Boston, MA, 02215, USA", 
          "organization": "Boston University"
        }
      ], 
      "surname": "Fitzpatrick", 
      "email": "fitzpatr@bu.edu", 
      "full_name": "Fitzpatrick, A.", 
      "given_names": "A."
    }, 
    {
      "affiliations": [
        {
          "country": "France", 
          "value": "Philippe Meyer Institute, Physics Department \u00c9cole Normale Sup\u00e9rieure (ENS), Universit\u00e9 PSL24 rue Lhomond, Paris, F-75231, France", 
          "organization": "Philippe Meyer Institute, Physics Department \u00c9cole Normale Sup\u00e9rieure (ENS), Universit\u00e9 PSL24 rue Lhomond"
        }
      ], 
      "surname": "Karateev", 
      "email": "d.s.karateev@gmail.com", 
      "full_name": "Karateev, Denis", 
      "given_names": "Denis"
    }
  ], 
  "titles": [
    {
      "source": "Springer", 
      "title": "Form factors and spectral densities from Lightcone Conformal Truncation"
    }
  ], 
  "dois": [
    {
      "value": "10.1007/JHEP04(2022)109"
    }
  ], 
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      "page_end": "39", 
      "journal_title": "Journal of High Energy Physics", 
      "material": "article", 
      "journal_volume": "2022", 
      "artid": "JHEP04(2022)109", 
      "year": 2022, 
      "page_start": "1", 
      "journal_issue": "4"
    }
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    "submission_number": "b6222fd2bf8a11eda920065bd8dc6b20"
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  "page_nr": [
    39
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      "url": "https://creativecommons.org/licenses//by/4.0", 
      "license": "CC-BY-4.0"
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  "copyright": [
    {
      "holder": "The Author(s)", 
      "year": "2022"
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  ], 
  "control_number": "69364", 
  "record_creation_date": "2022-04-21T15:30:25.994947", 
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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": "2107.10285"
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  "abstracts": [
    {
      "source": "Springer", 
      "value": "We use the method of Lightcone Conformal Truncation (LCT) to obtain form factors and spectral densities of local operators \ud835\udcaa in \u03d5 4 theory in two dimensions. We show how to use the Hamiltonian eigenstates from LCT to obtain form factors that are matrix elements of a local operator \ud835\udcaa between single-particle bra and ket states, and we develop methods that significantly reduce errors resulting from the finite truncation of the Hilbert space. We extrapolate these form factors as a function of momentum to the regime where, by crossing symmetry, they are form factors of \ud835\udcaa between the vacuum and a two-particle asymptotic scattering state. We also compute the momentum-space time-ordered two-point functions of local operators in LCT. These converge quickly at momenta away from branch cuts, allowing us to indirectly obtain the time-ordered correlator and the spectral density at the branch cuts. We focus on the case where the local operator \ud835\udcaa is the trace \u0398 of the stress tensor."
    }
  ], 
  "imprints": [
    {
      "date": "2022-04-20", 
      "publisher": "Springer"
    }
  ]
}