Time-dependent angular analysis of the decay B0s→J/ψϕ and extraction of ΔΓs and the CP-violating weak phase ϕs by ATLAS

0441681 - FZÚ 2015 RIV US eng J - Článek v odborném periodiku
Aad, G. - Abajyan, T. - Abbott, B. - Böhm, Jan - Chudoba, Jiří - Gallus, Petr - Gunther, Jaroslav - Jakoubek, Tomáš - Juránek, Vojtěch - Kepka, Oldřich - Kupčo, Alexander - Kůs, Vlastimil - Lokajíček, Miloš - Marčišovský, Michal - Mikeštíková, Marcela - Myška, Miroslav - Němeček, Stanislav - Růžička, Pavel - Schovancová, Jaroslava - Šícho, Petr - Staroba, Pavel - Svatoš, Michal - Taševský, Marek - Tic, Tomáš - Valenta, J. - Vrba, Václav - Zeman, Martin … celkem 2889 autorů
Time-dependent angular analysis of the decay B0s→J/ψϕ and extraction of ΔΓs and the CP-violating weak phase ϕs by ATLAS.
Journal of High Energy Physics. Roč. 2012, č. 12 (2012), s. 1-18. ISSN 1029-8479. E-ISSN 1029-8479
Grant CEP: GA MŠMT LA08032
Institucionální podpora: RVO:68378271
Klíčová slova: scattering * J/psi(3100) * ATLAS * time dependence * B/s0 * lifetime * amplitude analysis * transversity * experimental results * CERN LHC Coll
Kód oboru RIV: BG - Jaderná, atomová a mol. fyzika, urychlovače
Impakt faktor: 5.618, rok: 2012

A measurement of Bs J/psi phi decay parameters, including the CP-violating weak phase phi_s and the decay width difference Delta Gamma_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 sqrt(s) = 7 TeV. The mean decay width Gamma_s and the transversity amplitudes |A0(0)|^2 and |A||(0)|^2 are also measured. The values reported for these parameters are: phi_s = 0.22 /pm 0.41 (stat.) /pm 0.10 (syst.) rad Delta Gamma_s = 0.053 /pm 0.021 (stat.) /pm 0.010 (syst.) ps-1 Gamma_s = 0.677 /pm 0.007 (stat.) /pm 0.004 (syst.) ps-1 |A0(0)|^2 = 0.528 /pm 0.006 (stat.) /pm 0.009 (syst.) |A||(0)|^2 = 0.220 /pm 0.008 (stat.) /pm 0.007 (syst.) where the values quoted for phi_s and Delta Gamma_s correspond to the solution compatible with the external measurements to which the strong phase delta perpendicular is constrained and where Delta Gamma_s is constrained to be positive.
Trvalý link: http://hdl.handle.net/11104/0244644