Measurement of the CP-violating phase Φs in B0s → J/ψ Φ decays in ATLAS at 13 TeV
A measurement of the $$ B_{s}^{0} \rightarrow J/psi phi $$decay parameters using $$ 80.5\, \mathrm {fb^{-1}} $$of integrated luminosity collected with the ATLAS detector from 13 $$\text {Te}\text {V}$$proton-proton collisions at the LHC is presented. The measured parameters include the CP-violating...
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| Main Authors: | , , , , , , , , , , , , , , , , |
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| Corporate Author: | |
| Format: | Article (Journal) |
| Language: | English |
| Published: |
21 April 2021
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| In: |
The European physical journal. C, Particles and fields
Year: 2021, Volume: 81, Issue: 4, Pages: 1-36 |
| ISSN: | 1434-6052 |
| DOI: | 10.1140/epjc/s10052-021-09011-0 |
| Online Access: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1140/epjc/s10052-021-09011-0 Verlag, Volltext: https://link.springer.com/article/10.1140%2Fepjc%2Fs10052-021-09011-0 
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| Author Notes: | ATLAS Collaboration |
MARC
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| 245 | 1 | 0 | |a Measurement of the CP-violating phase Φs in B0s → J/ψ Φ decays in ATLAS at 13 TeV |c ATLAS Collaboration |
| 246 | 3 | 3 | |a Measurement of the CP-violating phase phi s in B 0 s rightarrow J/psi phi decays in ATLAS at thirteen TeV |
| 264 | 1 | |c 21 April 2021 | |
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| 500 | |a ATLAS Collaboration: G. Aad, M. Dunford, S. Franchino, M. Klassen, A. Krishnan, A. Kugel, T. Mkrtchyan, P.S. Ott, A. Schoening, H-C. Schultz-Coulon, T.M. Spieker, R. Stamen, P. Starovoitov, L. Vigani, S.M. Weber, M. Wessels, X. Yue [und viele weitere] | ||
| 500 | |a Gesehen am 09.08.2021 | ||
| 520 | |a A measurement of the $$ B_{s}^{0} \rightarrow J/psi phi $$decay parameters using $$ 80.5\, \mathrm {fb^{-1}} $$of integrated luminosity collected with the ATLAS detector from 13 $$\text {Te}\text {V}$$proton-proton collisions at the LHC is presented. The measured parameters include the CP-violating phase $$\phi _{s} $$, the width difference $$ \Delta \Gamma _{s}$$between the $$B_{s}^{0}$$meson mass eigenstates and the average decay width $$ \Gamma _{s}$$. The values measured for the physical parameters are combined with those from $$ 19.2\, \mathrm {fb^{-1}} $$of 7 and 8 $$\text {Te}\text {V}$$data, leading to the following: $$\begin{aligned} \phi _{s}= & {} -0.087 \pm 0.036 ~\mathrm {(stat.)} \pm 0.021 ~\mathrm {(syst.)~rad} \\ \Delta \Gamma _{s}= & {} 0.0657 \pm 0.0043 ~\mathrm {(stat.)}\pm 0.0037 ~\mathrm {(syst.)~ps}^{-1} \\ \Gamma _{s}= & {} 0.6703 \pm 0.0014 ~\mathrm {(stat.)}\pm 0.0018 ~\mathrm {(syst.)~ps}^{-1} \end{aligned}$$ϕs=-0.087±0.036(stat.)±0.021(syst.)radΔΓs=0.0657±0.0043(stat.)±0.0037(syst.)ps-1Γs=0.6703±0.0014(stat.)±0.0018(syst.)ps-1Results for $$\phi _{s} $$and $$ \Delta \Gamma _{s}$$are also presented as 68% confidence level contours in the $$\phi _{s} $$-$$ \Delta \Gamma _{s}$$plane. Furthermore the transversity amplitudes and corresponding strong phases are measured. $$\phi _{s} $$and $$ \Delta \Gamma _{s}$$measurements are in agreement with the Standard Model predictions. | ||
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