{
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  "authors": [
    {
      "affiliations": [
        {
          "country": "India", 
          "value": "Indian Institute of Technology Jodhpur, Jodhpur, India"
        }
      ], 
      "surname": "Alok", 
      "email": "akalok@iitj.ac.in", 
      "full_name": "Alok, Ashutosh Kumar", 
      "given_names": "Ashutosh Kumar"
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    {
      "affiliations": [
        {
          "country": "India", 
          "value": "Tata Institute of Fundamental Research, Homi Bhabha Road, Colaba, Mumbai, India"
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      "surname": "Dighe", 
      "email": "amol@theory.tifr.res.in", 
      "full_name": "Dighe, Amol", 
      "given_names": "Amol"
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    {
      "affiliations": [
        {
          "country": "India", 
          "value": "Tata Institute of Fundamental Research, Homi Bhabha Road, Colaba, Mumbai, India"
        }
      ], 
      "surname": "Gangal", 
      "email": "shireen.gangal@theory.tifr.res.in", 
      "full_name": "Gangal, Shireen", 
      "given_names": "Shireen"
    }, 
    {
      "surname": "Kumar", 
      "given_names": "Jacky", 
      "affiliations": [
        {
          "country": "Canada", 
          "value": "Physique des Particules, Universite de Montreal, C.P. 6128, succ. centre-ville, Montreal, Canada"
        }
      ], 
      "full_name": "Kumar, Jacky", 
      "orcid": "0000-0001-9053-0731", 
      "email": "jacky.kumar@umontreal.ca"
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  "titles": [
    {
      "source": "Elsevier", 
      "title": "The role of non-universal Couplings in Explaining the Anomaly"
    }
  ], 
  "collections": [
    {
      "primary": "Nuclear Physics B"
    }
  ], 
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      "value": "10.1016/j.nuclphysb.2021.115538"
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  "publication_info": [
    {
      "journal_volume": "971 C", 
      "journal_title": "Nuclear Physics B", 
      "material": "article", 
      "artid": "115538", 
      "year": 2021
    }
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  "$schema": "http://repo.scoap3.org/schemas/hep.json", 
  "abstracts": [
    {
      "source": "Elsevier", 
      "value": "The tension among measurements of <math><msub><mrow><mi>V</mi></mrow><mrow><mi>u</mi><mi>s</mi></mrow></msub></math> from different channels, the so-called Cabibbo Angle Anomaly, can be interpreted as a signal of lepton flavor universality (LFU) violation in the W boson couplings. We investigate this issue in the framework of effective field theory, keeping the gauge structure of the Standard Model (SM) unchanged. We introduce gauge-invariant dimension-6 effective operators that couple the Higgs doublet to leptons, thereby giving non-universal tree-level contributions to the couplings of electroweak gauge bosons. Due to the <math><mi>S</mi><mi>U</mi><msub><mrow><mo>(</mo><mn>2</mn><mo>)</mo></mrow><mrow><mi>L</mi></mrow></msub></math> gauge symmetry, a tension arises between the <math><msub><mrow><mi>V</mi></mrow><mrow><mi>u</mi><mi>s</mi></mrow></msub></math> measurements that are affected by new W couplings, and the electroweak precision measurements, which are also affected by the new Z couplings. We show that this tension can be alleviated by allowing additional sources of gauge-invariant couplings of Z boson to left- or right-handed leptons, and find the optimal regions indicated by the current data in the Wilson-coefficient space. We illustrate our model-independent results with the examples of minimal extensions of the SM involving the vector-like lepton (VLL) models. We point out that dimension-6 operators coupling the Higgs doublet to leptons can affect the rate of <math><mi>h</mi><mo>\u2192</mo><mi>\u03c4</mi><mi>\u03c4</mi></math> decay significantly in general, however this effect is restricted to less than a per cent level for the minimal VLL models."
    }
  ], 
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      "date": "2021-09-07", 
      "publisher": "Elsevier"
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    "source": "Elsevier", 
    "method": "Elsevier", 
    "submission_number": "8481822c69f611ee9688729695cabdc8"
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}