Name: CMS_2024_I2780732
Year: 2024
Summary: Measurement of Rdphi observable for the determination of the strong coupling at 13 TeV
Experiment: CMS
Collider: LHC
InspireID: 2780732
Status: VALIDATED
Reentrant: true
Authors:
 - Paris Gianneios <gianneios.paraskevas@cern.ch>
References:
 - 'CMS-SMP-22-005'
 - 'arXiv:2404.16082'
RunInfo: pp to jets at $\sqrt(s) = 13$ TeV. Data collected by the CMS experiment during 2016, 2017 and 2018.
Beams: [p+, p+]
Energies: [[6500,6500]]
Luminosity_fb: 134
Description:
  'A measurement is presented of the ratio observable $R_{\Delta\phi}(p_\mathrm{T})$ that provides a measure of the azimuthal
   correlations among jets with large transverse momentum $p_\mathrm{T}$. The $R_{\Delta\phi}(p_\mathrm{T})$ variable is
   measured in multijet events over the $p_\mathrm{T} = 360\mathord{-}3170~\mathrm{GeV}$ range based on data collected by the CMS
   experiment in proton-proton collisions at a centre-of-mass energy of 13 TeV, corresponding to an integrated luminosity of
   $134~\mathrm{fb}^{-1}$. The results are compared with predictions from Monte Carlo parton-shower event generator simulations,
   as well as with fixed-order perturbative quantum chromodynamics (pQCD) predictions at next-to-leading-order (NLO) accuracy
   obtained with different parton distribution functions (PDFs) and corrected for nonperturbative and electroweak effects. Data
   and theory agree within uncertainties. From the comparison of the measured distribution with the pQCD prediction obtained with
   the NNPDF3.1 NLO PDFs, the strong coupling constant at the Z boson mass scale is
   $\alpha_{\text{S}}(m_\text{Z}) = 0.1177 \pm 0.0013\, \text{(exp)} _{-0.0073}^{+0.0116} \, \text{(theo)} = 0.1177_{-0.0074}^{+0.0117}$,
   where the total uncertainty is dominated by the scale dependence of the fixed-order predictions. A test of the running of $\alpha_S(Q)$
   in the TeV region shows no deviation from the expected NLO pQCD behaviour.'
Keywords: []
BibKey:
BibTeX: '@techreport{CMS-PAS-SMP-22-005,
         collaboration = "CMS",
         title         = "{Measurement of azimuthal correlations among jets and
                       determination of the strong coupling in pp collisions at
                       $\sqrt{s}=13~\mathrm{TeV}$}",
         institution   = "CERN",
         reportNumber  = "CMS-PAS-SMP-22-005",
         address       = "Geneva",
         year          = "2023",
         url           = "http://cds.cern.ch/record/2868568",
         }'
ReleaseTests:
 - $A LHC-13-DiJets-boosted
