Please use this identifier to cite or link to this item: https://hdl.handle.net/2445/222010
Title: Measurement of the D* longitudinal polarization in B0 →d*-τ+ντ decays
Author: Comerma Montells, Albert
Garcia Moreno, Paula
Garrido Beltrán, Lluís
Gioventù, Alessandra
Gironella Gironell, Pere
Gomez Fernandez, Sergio
Graugés Pous, Eugeni
Lobo Salvia, Aniol
López Huertas, Albert
Manera Escalero, Rafel
Marin Benito, Carla
Mauricio Ferre, Joan
Alfonso Albero, Alejandro
Vazquez Gomez, Ricardo
LHCb Collaboration
Keywords: Hadrons
Polarització (Física nuclear)
Quarks
Hadrons
Polarization (Nuclear physics)
Quarks
Issue Date: 2024
Publisher: American Physical Society
Abstract: The longitudinal polarization fraction of the D meson is measured in B0 → D−τþντ decays, where the τ lepton decays to three charged pions and a neutrino, using proton-proton collision data collected by the LHCb experiment at center-of-mass energies of 7, 8 and 13 TeV and corresponding to an integrated luminosity of 5 fb−1. The D polarization fraction FD L is measured in two q2 regions, below and above 7 GeV2=c4, where q2 is defined as the squared invariant mass of the τντ system. The FD L values are measured to be 0.52 0.07 0.04 and 0.34 0.08 0.02 for the lower and higher q2 regions, respectively. The first uncertainties are statistical and the second systematic. The average value over the whole q2 range is FD L ¼ 0.41 0.06 0.03. These results are compatible with the Standard Model predictions.
Note: Reproducció del document publicat a: https://doi.org/10.1103/PhysRevD.110.092007
It is part of: Physical Review D, 2024, vol. 110, num.092007
URI: https://hdl.handle.net/2445/222010
Related resource: https://doi.org/10.1103/PhysRevD.110.092007
ISSN: 2470-0010
Appears in Collections:Articles publicats en revistes (Física Quàntica i Astrofísica)
Articles publicats en revistes (Institut de Ciències del Cosmos (ICCUB))

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