Time-dependent angular analysis of the decay B\(^0_s\)→J/ψϕ and extraction of ΔΓ\(_s\) and the CP-violating weak phase ϕ\(_s\) by ATLAS
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- A measurement of B\(^0_s\)→J/ψϕ decay parameters, including the CP -violating weak phase ϕ\(_s\) and the decay width difference ΔΓ\(_s\) is reported, using 4.9 fb\(^{−1}\) of integrated luminosity collected in 2011 by the ATLAS detector from LHC pp collisions at a centre-of-mass energy √s=7 TeV. The mean decay width Γ\(_s\) and the transversity amplitudes |A\(_0\)(0)|\(^2\) and |A\(_∥\)(0)|\(^2\) are also measured. The values reported for these parameters are:
ϕ\(_s\)=0.22±0.41 (stat.)±0.10 (syst.) rad
ΔΓ\(_s\)=0.053±0.021 (stat.)±0.010A measurement of B\(^0_s\)→J/ψϕ decay parameters, including the CP -violating weak phase ϕ\(_s\) and the decay width difference ΔΓ\(_s\) is reported, using 4.9 fb\(^{−1}\) of integrated luminosity collected in 2011 by the ATLAS detector from LHC pp collisions at a centre-of-mass energy √s=7 TeV. The mean decay width Γ\(_s\) and the transversity amplitudes |A\(_0\)(0)|\(^2\) and |A\(_∥\)(0)|\(^2\) are also measured. The values reported for these parameters are:
ϕ\(_s\)=0.22±0.41 (stat.)±0.10 (syst.) rad
ΔΓ\(_s\)=0.053±0.021 (stat.)±0.010 (syst.)ps\(^{−1}\)
Γ\(_s\)=0.677±0.007 (stat.)±0.004 (syst.) ps\(^{−1}\)
|A\(_0\)(0)|\(^2\)=0.528±0.006 (stat.)±0.009 (syst.)
|A\(_∥\)(0)|\(^2\)=0.220±0.008 (stat.)±0.007 (syst.)
where the values quoted for ϕ\(_s\) and ΔΓ\(_s\) correspond to the solution compatible with the external measurements to which the strong phase δ\(_⊥\) is constrained and where ΔΓ\(_s\) is constrained to be positive. The fraction of S-wave KK or f\(_0\) contamination through the decays B\(^0_s\)→J/ψK\(^+\)K\(^−\)(f\(_0\)) is measured as well and is found to be consistent with zero. Results for ϕ\(_s\) and ΔΓ\(_s\) are also presented as 68%, 90% and 95% likelihood contours, which show agreement with Standard Model expectations.…
| URN: | urn:nbn:de:bvb:20-opus-128125 |
|---|---|
| Dokumentart: | Artikel / Aufsatz in einer Zeitschrift |
| Institute der Universität: | Fakultät für Physik und Astronomie |
| Sprache der Veröffentlichung: | Englisch |
| Titel des übergeordneten Werkes / der Zeitschrift (Englisch): | Journal of High Energy Physics |
| Erscheinungsjahr: | 2012 |
| Band / Jahrgang: | 12 |
| Heft / Ausgabe: | 072 |
| Originalveröffentlichung / Quelle: | Journal of High Energy Physics 12 (2012) 072. DOI: 10.1007/JHEP12(2012)072 |
| DOI: | https://doi.org/10.1007/JHEP12(2012)072 |
| Allgemeine fachliche Zuordnung (DDC-Klassifikation): | 5 Naturwissenschaften und Mathematik / 53 Physik / 539 Moderne Physik |
| Freie Schlagwort(e): | hadron-hadron scattering |
| Datum der Freischaltung: | 14.11.2016 |
| Urhebende Körperschaft: | ATLAS Collaboration |
| Lizenz (Deutsch): |  CC BY: Creative-Commons-Lizenz: Namensnennung |