{
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  "authors": [
    {
      "affiliations": [
        {
          "country": "Poland", 
          "value": "Institute of Nuclear Physics, Polish Academy of Sciences, ul. Radzikowskiego 152, Krak\u00f3w, PL-31-342, Poland", 
          "organization": "Polish Academy of Sciences"
        }
      ], 
      "surname": "Babiarz", 
      "email": "izabela.babiarz@ifj.edu.pl", 
      "full_name": "Babiarz, Izabela", 
      "given_names": "Izabela"
    }, 
    {
      "affiliations": [
        {
          "country": "Sweden", 
          "value": "Department of Physics, Lund University, Lund, SE-223 62, Sweden", 
          "organization": "Lund University"
        }
      ], 
      "surname": "Pasechnik", 
      "email": "roman.pasechnik@fysik.lu.se", 
      "full_name": "Pasechnik, Roman", 
      "given_names": "Roman"
    }, 
    {
      "affiliations": [
        {
          "country": "Poland", 
          "value": "Institute of Nuclear Physics, Polish Academy of Sciences, ul. Radzikowskiego 152, Krak\u00f3w, PL-31-342, Poland", 
          "organization": "Polish Academy of Sciences"
        }
      ], 
      "surname": "Sch\u00e4fer", 
      "email": "wolfgang.schafer@ifj.edu.pl", 
      "full_name": "Sch\u00e4fer, Wolfgang", 
      "given_names": "Wolfgang"
    }, 
    {
      "affiliations": [
        {
          "country": "Poland", 
          "value": "Institute of Nuclear Physics, Polish Academy of Sciences, ul. Radzikowskiego 152, Krak\u00f3w, PL-31-342, Poland", 
          "organization": "Polish Academy of Sciences"
        }, 
        {
          "country": "Poland", 
          "value": "College of Mathematics and Natural Sciences, University of Rzesz\u00f3w, ul. Pigonia 1, Rzesz\u00f3w, PL-35-310, Poland", 
          "organization": "University of Rzesz\u00f3w"
        }
      ], 
      "surname": "Szczurek", 
      "email": "antoni.szczurek@ifj.edu.pl", 
      "full_name": "Szczurek, Antoni", 
      "given_names": "Antoni"
    }
  ], 
  "titles": [
    {
      "source": "Springer", 
      "title": "\u03c7  c2 tensor meson transition form factors in the light front approach"
    }
  ], 
  "dois": [
    {
      "value": "10.1007/JHEP06(2024)159"
    }
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      "page_end": "21", 
      "journal_title": "Journal of High Energy Physics", 
      "material": "article", 
      "journal_volume": "2024", 
      "artid": "JHEP06(2024)159", 
      "year": 2024, 
      "page_start": "1", 
      "journal_issue": "6"
    }
  ], 
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  "acquisition_source": {
    "date": "2024-06-24T18:30:19.762806", 
    "source": "Springer", 
    "method": "Springer", 
    "submission_number": "c3d77646325711ef9fecbe60ec5a7b90"
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  "page_nr": [
    21
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  "license": [
    {
      "url": "https://creativecommons.org/licenses//by/4.0", 
      "license": "CC-BY-4.0"
    }
  ], 
  "copyright": [
    {
      "holder": "The Author(s)", 
      "year": "2024"
    }
  ], 
  "control_number": "86536", 
  "record_creation_date": "2024-06-24T18:30:19.762840", 
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  "collections": [
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      "primary": "Journal of High Energy Physics"
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  ], 
  "arxiv_eprints": [
    {
      "categories": [
        "hep-ph"
      ], 
      "value": "2402.13910"
    }
  ], 
  "abstracts": [
    {
      "source": "Springer", 
      "value": "We continue our work on the light-front formulation of quarkonium \u03b3 \u2217 \u03b3 transition form factors, extending the formalism to J  PC  = 2++ tensor meson states. We present an analysis of \u03b3 \u2217 \u03b3 \u2192 \u03c7  c2 transition amplitude and the pertinent helicity form factors. Our relativistic formalism is based on the light-front quark-antiquark wave function of the quarkonium. We calculate the two-photon decay width as well as three independent \u03b3 \u2217 \u03b3 transition form factors for J  z  = 0, 1, 2 as a function of photon virtuality Q 2. We compare our results for the two-photon decay width to the recently measured ones by the Belle and BES III collaborations. Even when including relativistic corrections, a very small \u0393(\u03bb = 0)/\u0393(\u03bb = 2) ~ 10 \u22123 ratio is found which is beyond present experimental precision. We also present the form factors as a function of photon virtuality and compare them to the sparse experimental data on the so-called off-shell width. The formalism presented here can be used for other 2++ mesons, excited charmonia or bottomonia or even light   <math> <mi>q</mi> <mover> <mi>q</mi> <mo>\u00af</mo> </mover> </math>  $$ q\\overline{q} $$ -mesons."
    }
  ], 
  "imprints": [
    {
      "date": "2024-06-24", 
      "publisher": "Springer"
    }
  ]
}