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http://hdl.handle.net/2445/185482
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DC Field | Value | Language |
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dc.contributor.author | LHCb Collaboration | - |
dc.contributor.author | Alfonso Albero, Alejandro | - |
dc.contributor.author | Garcia Moreno, P. | - |
dc.contributor.author | Garrido Beltrán, Lluís | - |
dc.contributor.author | Gironella Gironell, P. | - |
dc.contributor.author | Gomez Fernandez, S. | - |
dc.contributor.author | Graugés Pous, Eugeni | - |
dc.contributor.author | Lobo Salvia, A. | - |
dc.contributor.author | Mauricio, J. | - |
dc.contributor.author | Vazquez Gomez, R. | - |
dc.contributor.author | Marin Benito, Carla | - |
dc.date.accessioned | 2022-05-10T14:47:53Z | - |
dc.date.available | 2022-05-10T14:47:53Z | - |
dc.date.issued | 2021 | - |
dc.identifier.issn | 1126-6708 | - |
dc.identifier.uri | http://hdl.handle.net/2445/185482 | - |
dc.description.abstract | The first full angular analysis of the B0 → D∗−D∗+ s decay is performed using 6 fb−1 of pp collision data collected with the LHCb experiment at a centre-of-mass energy of 13 TeV. The D∗+ s → D+ s γ and D∗− → D 0 π − vector meson decays are used with the subsequent D+ s → K+K−π + and D 0 → K+π − decays. All helicity amplitudes and phases are measured, and the longitudinal polarisation fraction is determined to be fL = 0.578±0.010±0.011 with world-best precision, where the first uncertainty is statistical and the second is systematic. The pattern of helicity amplitude magnitudes is found to align with expectations from quark-helicity conservation in B decays. The ratio of branching fractions [B(B0 → D∗−D∗+ s ) × B(D∗+ s → D+ s γ)]/B(B0 → D∗−D+ s ) is measured to be 2.045 ± 0.022 ± 0.071 with world-best precision. In addition, the first observation of the Cabibbo-suppressed Bs → D∗−D+ s decay is made with a significance of seven standard deviations. The branching fraction ratio B(Bs → D∗−D+ s )/B(B0 → D∗−D+ s ) is measured to be 0.049 ± 0.006 ± 0.003 ± 0.002, where the third uncertainty is due to limited knowledge of the ratio of fragmentation fractions. | - |
dc.format.extent | 30 p. | - |
dc.format.mimetype | application/pdf | - |
dc.language.iso | eng | - |
dc.publisher | Springer Verlag | - |
dc.relation.isformatof | Reproducció del document publicat a: https://doi.org/10.1007/JHEP06(2021)177 | - |
dc.relation.ispartof | Journal of High Energy Physics, 2021, vol. 2021, p. 1-30 | - |
dc.relation.uri | https://doi.org/10.1007/JHEP06(2021)177 | - |
dc.rights | cc-by (c) LHCb Collaboration et al., 2021 | - |
dc.rights.uri | https://creativecommons.org/licenses/by/4.0/ | - |
dc.source | Articles publicats en revistes (Física Quàntica i Astrofísica) | - |
dc.subject.classification | Hadrons | - |
dc.subject.classification | Gran Col·lisionador d'Hadrons | - |
dc.subject.classification | Física de partícules | - |
dc.subject.classification | Experiments | - |
dc.subject.other | Hadrons | - |
dc.subject.other | Large Hadron Collider (France and Switzerland) | - |
dc.subject.other | Particle physics | - |
dc.subject.other | Experiments | - |
dc.title | Angular analysis of B0→D∗−D∗+s with D∗+s→D+sγ decays | - |
dc.type | info:eu-repo/semantics/article | - |
dc.type | info:eu-repo/semantics/publishedVersion | - |
dc.identifier.idgrec | 721071 | - |
dc.date.updated | 2022-05-10T14:47:53Z | - |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | - |
Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) |
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File | Description | Size | Format | |
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721071.pdf | 1.6 MB | Adobe PDF | View/Open |
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