Angular analysis of B0 → D*- D*+s with D*+s → D+s γ decays
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*− → D0 π- vector meson decays are used with the subsequent D+s → K+K−π+ and D0 → K+π− decays. All...
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| Hauptverfasser: | , , , , , , , , , , , , , , , , , , , , , |
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| Körperschaft: | |
| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
June 29, 2021
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| In: |
Journal of high energy physics
Year: 2021, Heft: 6, Pages: 1-29 |
| ISSN: | 1029-8479 |
| DOI: | 10.1007/JHEP06(2021)177 |
| Online-Zugang: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1007/JHEP06(2021)177 Verlag, lizenzpflichtig, Volltext: https://link.springer.com/article/10.1007%2FJHEP06%282021%29177 
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| Verfasserangaben: | The LHCb collaboration |
MARC
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| 245 | 1 | 0 | |a Angular analysis of B0 → D*- D*+s with D*+s → D+s γ decays |c The LHCb collaboration |
| 246 | 3 | 3 | |a Angular analysis of B 0 → D *- D * + s with D * + s → D + s gamma decays |
| 264 | 1 | |c June 29, 2021 | |
| 300 | |a 29 | ||
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| 500 | |a Im Text sind "0", "*", "+" und "-" hochgestellt, "s" jeweils tiefgestellt | ||
| 500 | |a The LHCb collaboration: R. Aaij, F. Archilli, S. Bachmann, D. Berninghoff, M. Borsato, G. Frau, D. Gerick, J.P. Grabowski, P.A. Günther, X. Han, S. Hansmann-Menzemer, J. Hu, R. Kopecna, B. Leverington, P. Li, H. Malygina, J. Marks, D.J. Unverzagt, U. Uwer, C. Wang, L. Witola, A. Zhelezov [und viele weitere] | ||
| 520 | |a 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*− → D0 π- vector meson decays are used with the subsequent D+s → K+K−π+ and D0 → 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. | ||
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