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@ARTICLE{Alexandrou:586747,
      author       = {Alexandrou, Constantia and Bacchio, Simone and De Santis,
                      Alessandro and Dimopoulos, Petros and Finkenrath, Jacob and
                      Frezzotti, Roberto and Gagliardi, Giuseppe and Garofalo,
                      Marco and Hadjiyiannakou, Kyriakos and Kostrzewa, Bartosz
                      and Jansen, Karl and Lubicz, Vittorio and Petschlies, Marcus
                      and Sanfilippo, Francesco and Simula, Silvano and Tantalo,
                      Nazario and Urbach, Carsten and Wenger, Urs},
      collaboration = {Extended Twisted {Mass Collaboration}},
      title        = {{P}robing the {E}nergy-{S}meared ${R}$ {R}atio {U}sing
                      {L}attice {QCD}},
      journal      = {Physical review letters},
      volume       = {130},
      number       = {24},
      issn         = {0031-9007},
      address      = {College Park, Md.},
      publisher    = {APS},
      reportid     = {PUBDB-2023-03985, arXiv:2212.08467},
      pages        = {241901},
      year         = {2023},
      note         = {Version accepted for publication on PRL. Results unchanged},
      abstract     = {We present a first-principles lattice QCD investigation of
                      the $R$ ratio between the $e^+e^-$ cross section into
                      hadrons and into muons. By using the method of Ref. [1],
                      that allows one to extract smeared spectral densities from
                      Euclidean correlators, we compute the R ratio convoluted
                      with Gaussian smearing kernels of widths of about 600 MeV
                      and central energies from 220 MeV up to 2.5 GeV. Our
                      theoretical results are compared with the corresponding
                      quantities obtained by smearing the KNT19 compilation [2] of
                      $R$-ratio experimental measurements with the same kernels
                      and, by centering the Gaussians in the region around the
                      $ρ$-resonance peak, a tension of about 3 standard
                      deviations is observed. From the phenomenological
                      perspective, we have not included yet in our calculation QED
                      and strong isospin-breaking corrections, and this might
                      affect the observed tension. From the methodological
                      perspective, our calculation demonstrates that it is
                      possible to study the $R$ ratio in Gaussian energy bins on
                      the lattice at the level of accuracy required in order to
                      perform precision tests of the standard model.},
      keywords     = {density: spectral (INSPIRE) / correlation function:
                      Euclidean (INSPIRE) / muon (INSPIRE) / GeV (INSPIRE) /
                      lattice (INSPIRE) / lattice field theory (INSPIRE) / quantum
                      chromodynamics (INSPIRE) / tension (INSPIRE) / hadron
                      (INSPIRE)},
      cin          = {CQTA},
      ddc          = {530},
      cid          = {I:(DE-H253)CQTA-20221102},
      pnm          = {611 - Fundamental Particles and Forces (POF4-611)},
      pid          = {G:(DE-HGF)POF4-611},
      experiment   = {EXP:(DE-MLZ)NOSPEC-20140101},
      typ          = {PUB:(DE-HGF)16},
      eprint       = {2212.08467},
      howpublished = {arXiv:2212.08467},
      archivePrefix = {arXiv},
      SLACcitation = {$\%\%CITATION$ = $arXiv:2212.08467;\%\%$},
      pubmed       = {37390427},
      UT           = {WOS:001025958700005},
      doi          = {10.1103/PhysRevLett.130.241901},
      url          = {https://bib-pubdb1.desy.de/record/586747},
}