Measurement of the CP-violating phase phi(s) in B-s(0) -> J/psi phi decays in ATLAS at 13 TeV

For complete list of authors see http://dx.doi.org/10.1140/epjc/s10052-021-09011-0
QC 20210614
A measurement of the B-0(s) -> J/psi phi decay parameters using 80.5 fb(-1) of integrated luminosity collected with the ATLAS detector from 13 TeV 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 fb(-1) of 7 and 8 TeV data, leading to the following: phi(s) = -0.087 +/- 0.036 (stat.) +/- 0.021 (syst.) rad Delta Gamma(s) = 0.0657 +/- 0.0043 (stat.) +/- 0.0037 (syst.) ps(-1) Gamma(s) = 0.6703 +/- 0.0014 (stat.) +/- 0.0018 (syst.) ps(-1) Results 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.

Asimakopoulou, Eleni M.Uppsala universitet,Högenergifysik(Swepub:uu)eleas553 (author)
Bergeås Kuutmann, Elin,1980-Uppsala universitet,Högenergifysik(Swepub:uu)elibe340 (author)
Bokan, PetarUppsala universitet,Högenergifysik(Swepub:uu)petbo828 (author)
Brenner, RichardUppsala universitet,Högenergifysik(Swepub:uu)richbren (author)
Ekelöf, TordUppsala universitet,Högenergifysik(Swepub:uu)tordeke (author)
Ellajosyula, VenugopalUppsala universitet,Högenergifysik(Swepub:uu)venel845 (author)
Ellert, MattiasUppsala universitet,Högenergifysik(Swepub:uu)mel03009 (author)
Ferrari, Arnaud,1973-Uppsala universitet,Högenergifysik(Swepub:uu)arfer499 (author)
Isacson, MaxUppsala universitet,Högenergifysik(Swepub:uu)maxis346 (author)
Mårtensson, Mikael U. F.Uppsala universitet,Högenergifysik(Swepub:uu)mikma359 (author)
Sales De Bruin, PedroUppsala universitet,Högenergifysik(Swepub:uu)pedsa873 (author)
Zwalinski, L.CERN, Geneva, Switzerland. (author)
Ohm, ChristianKTH,Partikel- och astropartikelfysik(Swepub:kth)u128x0hb (author)
Ripellino, GiuliaKTH,Partikel- och astropartikelfysik(Swepub:kth)u13f31yo (author)
Sidebo, P. EdvinKTH,Partikel- och astropartikelfysik(Swepub:kth)u1bwjttr (author)
Strandberg, JonasKTH,Partikel- och astropartikelfysik(Swepub:kth)u1midk9y (author)
Aix Marseille Univ, CPPM, CNRS, IN2P3, Marseille, France.Högenergifysik (creator_code:org_t)

By the author/editor: Aad, G.; Asimakopoulou, E ...; Bergeås Kuutmann ...; Bokan, Petar; Brenner, Richard; Ekelöf, Tord; show more...; Ellajosyula, Ven ...; Ellert, Mattias; Ferrari, Arnaud, ...; Isacson, Max; Mårtensson, Mika ...; Sales De Bruin, ...; Zwalinski, L.; Ohm, Christian; Ripellino, Giuli ...; Sidebo, P. Edvin; Strandberg, Jona ...; show less...

About the subject

NATURAL SCIENCES: NATURAL SCIENCES; and Physical Science ...; and Subatomic Physic ...

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