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We measure the complete set of angular coefficients J_{i} for exclusive B[over ¯]→D^{*}ℓν[over ¯]_{ℓ} decays (ℓ=e, μ). Our analysis uses the full 711 fb^{-1} Belle dataset with hadronic tag-side reconstruction. The results allow us to extract the form factors describing the B[over ¯]→D^{*} transition and the Cabibbo-Kobayashi-Maskawa matrix element |V_{cb}|.
View Article and Find Full Text PDFCombination of Measurements of the Top Quark Mass from Data Collected by the ATLAS and CMS Experiments at sqrt[s]=7 and 8 TeV.
Phys Rev Lett
June 2024
CERN, Geneva, Switzerland.
Article Synopsis
- * The measurements utilized both semileptonic and hadronic decays of top quarks, along with events focused on single top quark production in the electroweak t channel.
- * The combined result for the top quark mass is 172.52 GeV, with a reduced total uncertainty of 0.33 GeV, showcasing an improvement of 31% over previous measurements.
Azimuthal Angle Correlations of Muons Produced via Heavy-Flavor Decays in 5.02 TeV Pb+Pb and pp Collisions with the ATLAS Detector.
Phys Rev Lett
May 2024
CERN, Geneva, Switzerland.
Angular correlations between heavy quarks provide a unique probe of the quark-gluon plasma created in ultrarelativistic heavy-ion collisions. Results are presented of a measurement of the azimuthal angle correlations between muons originating from semileptonic decays of heavy quarks produced in 5.02 TeV Pb+Pb and pp collisions at the LHC.
View Article and Find Full Text PDFObservation of D_{s}^{+}→η^{'}μ^{+}ν_{μ}, Precision Test of Lepton Flavor Universality with D_{s}^{+}→η^{(')}l^{+}ν_{l}, and First Measurements of D_{s}^{+}→η^{(')}μ^{+}ν_{μ} Decay Dynamics.
Phys Rev Lett
March 2024
State Key Laboratory of Particle Detection and Electronics, Beijing 100049, Hefei 230026, People's Republic of China.
By analyzing 7.33 fb^{-1} of e^{+}e^{-} annihilation data collected at center-of-mass energies between 4.128 and 4.
View Article and Find Full Text PDFArticle Synopsis
- The research presents the first simultaneous measurement of the absolute value of the Cabibbo-Kobayashi-Maskawa matrix element V_{ub}, using data from the Belle experiment at the ϒ(4S) resonance.
- It involves analyzing decay events of B mesons to isolate specific decay processes, allowing for a more accurate determination of V_{ub} through a two-dimensional fitting technique.
- The results show values for exclusive and inclusive decay measurements of V_{ub}, which are consistent and indicate that both measurement methods are aligned with the theoretical expectations.
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