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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