Abstract
The decays of B 0 s and \( {\overline{B}}_s^0 \) mesons into the J/ψK + K − final state are studied in the K + K − mass region above the ϕ(1020) meson in order to determine the resonant substructure and measure the CP-violating phase, ϕ s , the decay width, Γ s , and the width difference between light and heavy mass eigenstates, ΔΓ s . A decay-time dependent amplitude analysis is employed. The data sample corresponds to an integrated luminosity of 3 fb−1 produced in 7 and 8 TeV pp collisions at the LHC, collected by the LHCb experiment. The measurement determines ϕ s = 119 ± 107 ± 34 mrad. A combination with previous LHCb measurements using similar decays into the J/ψπ + π − and J/ψϕ(1020) final states gives ϕ s = 1 ± 37 mrad, consistent with the Standard Model prediction.
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References
J. Charles et al., Current status of the Standard Model CKM fit and constraints on ΔF = 2 new physics, Phys. Rev. D 91 (2015) 073007 [arXiv:1501.05013] [INSPIRE].
R. Fleischer, Theoretical prospects for B physics, PoS(FPCP2015)002 [arXiv:1509.00601] [INSPIRE].
LHCb collaboration, Measurement of the CP-violating phase β in B 0 → J/ψπ + π − decays and limits on penguin effects, Phys. Lett. B 742 (2015) 38 [arXiv:1411.1634] [INSPIRE].
LHCb collaboration, Measurement of CP-violation parameters and polarisation fractions in \( {B}_s^0\to J/\psi {\overline{K}}^{\ast 0} \) decays, JHEP 11 (2015) 082 [arXiv:1509.00400] [INSPIRE].
D0 collaboration, V.M. Abazov et al., Measurement of the CP-violating phase ϕ J/ψϕ s using the flavor-tagged decay B 0 s → J/ψϕ in 8 fb −1 of \( p\overline{p} \) collisions, Phys. Rev. D 85 (2012) 032006 [arXiv:1109.3166] [INSPIRE].
CDF collaboration, T. Aaltonen et al., Measurement of the bottom-strange meson mixing phase in the full CDF data set, Phys. Rev. Lett. 109 (2012) 171802 [arXiv:1208.2967] [INSPIRE].
LHCb collaboration, Precision measurement of CP violation in B 0 s → J/ψK + K − decays, Phys. Rev. Lett. 114 (2015) 041801 [arXiv:1411.3104] [INSPIRE].
LHCb collaboration, Measurement of the CP-violating phase ϕ s in \( {\overline{B}}_s^0\to J/\psi {\pi}^{+}{\pi}^{-} \) decays, Phys. Lett. B 736 (2014) 186 [arXiv:1405.4140] [INSPIRE].
CMS collaboration, Measurement of the CP-violating weak phase ϕ s and the decay width difference ΔΓ s using the B 0 s → J/ψϕ(1020) decay channel in pp collisions at \( \sqrt{s}=8 \) TeV, Phys. Lett. B 757 (2016) 97 [arXiv:1507.07527] [INSPIRE].
ATLAS collaboration, Measurement of the CP-violating phase ϕ s and the B 0 s meson decay width difference with B 0 s → J/ψϕ decays in ATLAS, JHEP 08 (2016) 147 [arXiv:1601.03297] [INSPIRE].
LHCb collaboration, Measurement of the CP-violating phase ϕ s in \( {\overline{B}}_s^0\to {D}_s^{+}{D}_s^{-} \) decays, Phys. Rev. Lett. 113 (2014) 211801 [arXiv:1409.4619] [INSPIRE].
LHCb collaboration, First study of the CP-violating phase and decay-width difference in B 0 s → ψ(2S)ϕ decays, Phys. Lett. B 762 (2016) 253 [arXiv:1608.04855] [INSPIRE].
Y. Amhis et al., Averages of b-hadron, c-hadron and τ-lepton properties as of summer 2016, arXiv:1612.07233 [INSPIRE].
LHCb collaboration, Amplitude analysis and the branching fraction measurement of \( {\overline{B}}_s^0\to J/\psi {K}^{+}{K}^{-} \), Phys. Rev. D 87 (2013) 072004 [arXiv:1302.1213] [INSPIRE].
LHCb collaboration, Observation of B s → J/ψf ′2 (1525) in J/ψK + K − final states, Phys. Rev. Lett. 108 (2012) 151801 [arXiv:1112.4695] [INSPIRE].
L. Zhang and S. Stone, Time-dependent Dalitz-plot formalism for B q → J/ψ h + h −, Phys. Lett. B 719 (2013) 383 [arXiv:1212.6434] [INSPIRE].
A.S. Dighe, I. Dunietz, H.J. Lipkin and J.L. Rosner, Angular distributions and lifetime differences in B s → J/ψϕ decays, Phys. Lett. B 369 (1996) 144 [hep-ph/9511363] [INSPIRE].
I.I.Y. Bigi and A.I. Sanda, CP violation, Camb. Monogr. Part. Phys. Nucl. Phys. Cosmol. 9 (2000) 1 [INSPIRE].
LHCb collaboration, Measurement of CP-violation and the B 0 s meson decay width difference with B 0 s → J/ψK + K − and B 0 s → J/ψπ + π − decays, Phys. Rev. D 87 (2013) 112010 [arXiv:1304.2600] [INSPIRE].
LHCb collaboration, Measurement of the CP asymmetry in \( {B}_s^0-{\overline{B}}_s^0 \) mixing, Phys. Rev. Lett. 117 (2016) 061803 [Addendum ibid. 118 (2017) 129903] [arXiv:1605.09768] [INSPIRE].
LHCb collaboration, The LHCb detector at the LHC, 2008 JINST 3 S08005 [INSPIRE].
LHCb collaboration, LHCb detector performance, Int. J. Mod. Phys. A 30 (2015) 1530022 [arXiv:1412.6352] [INSPIRE].
P. Morawski and M. Witek, Primary vertex reconstruction at LHCb, LHCb-PUB-2014-044, CERN, Geneva Switzerland, (2014).
Particle Data Group collaboration, C. Patrignani et al., Review of particle physics, Chin. Phys. C 40 (2016) 100001 [INSPIRE].
T. Sjöstrand, S. Mrenna and P.Z. Skands, PYTHIA 6.4 physics and manual, JHEP 05 (2006) 026 [hep-ph/0603175] [INSPIRE].
T. Sjöstrand, S. Mrenna and P.Z. Skands, A brief introduction to PYTHIA 8.1, Comput. Phys. Commun. 178 (2008) 852 [arXiv:0710.3820] [INSPIRE].
D.J. Lange, The EvtGen particle decay simulation package, Nucl. Instrum. Meth. A 462 (2001) 152 [INSPIRE].
P. Golonka and Z. Was, PHOTOS Monte Carlo: a precision tool for QED corrections in Z and W decays, Eur. Phys. J. C 45 (2006) 97 [hep-ph/0506026] [INSPIRE].
J. Allison et al., GEANT4 developments and applications, IEEE Trans. Nucl. Sci. 53 (2006) 270 [INSPIRE].
GEANT4 collaboration, S. Agostinelli et al., GEANT4: a simulation toolkit, Nucl. Instrum. Meth. A 506 (2003) 250 [INSPIRE].
LHCb collaboration, The LHCb simulation application, Gauss: design, evolution and experience, J. Phys. Conf. Ser. 331 (2011) 032023 [INSPIRE].
L. Breiman, J.H. Friedman, R.A. Olshen and C.J. Stone, Classification and regression trees, Wadsworth international group, Belmont CA U.S.A., (1984) [INSPIRE].
M. Adinolfi et al., Performance of the LHCb RICH detector at the LHC, Eur. Phys. J. C 73 (2013) 2431 [arXiv:1211.6759] [INSPIRE].
Belle collaboration, K. Chilikin et al., Observation of a new charged charmoniumlike state in \( {\overline{B}}^0\to J/\psi {K}^{-}{\pi}^{+} \) decays, Phys. Rev. D 90 (2014) 112009 [arXiv:1408.6457] [INSPIRE].
LHCb collaboration, Observation of J/ψp resonances consistent with pentaquark states in Λ 0 b → J/ψK − p decays, Phys. Rev. Lett. 115 (2015) 072001 [arXiv:1507.03414] [INSPIRE].
D. Martínez Santos and F. Dupertuis, Mass distributions marginalized over per-event errors, Nucl. Instrum. Meth. A 764 (2014) 150 [arXiv:1312.5000] [INSPIRE].
LHCb collaboration, Opposite-side flavour tagging of B mesons at the LHCb experiment, Eur. Phys. J. C 72 (2012) 2022 [arXiv:1202.4979] [INSPIRE].
LHCb collaboration, A new algorithm for identifying the flavour of B 0 s mesons at LHCb, 2016 JINST 11 P05010 [arXiv:1602.07252] [INSPIRE].
Belle collaboration, C.P. Shen et al., Observation of the ϕ(1680) and the Y (2175) in e + e − → ϕπ + π −, Phys. Rev. D 80 (2009) 031101 [arXiv:0808.0006] [INSPIRE].
Belle collaboration, K. Abe et al., Measurement of K + K − production in two photon collisions in the resonant mass region, Eur. Phys. J. C 32 (2003) 323 [hep-ex/0309077] [INSPIRE].
Belle collaboration, R. Mizuk et al., Observation of two resonance-like structures in the π + χ c1 mass distribution in exclusive \( {\overline{B}}^0\to {K}^{-}{\pi}^{+}{\chi_c}_1 \) decays, Phys. Rev. D 78 (2008) 072004 [arXiv:0806.4098] [INSPIRE].
M. Pivk and F.R. Le Diberder, SPlot: a statistical tool to unfold data distributions, Nucl. Instrum. Meth. A 555 (2005) 356 [physics/0402083] [INSPIRE].
Y. Xie, sFit: a method for background subtraction in maximum likelihood fit, arXiv:0905.0724 [INSPIRE].
LHCb collaboration, Measurement of the \( {\overline{B}}^0-{B}^0 \) and \( {\overline{B}}_s^0-{B}_s^0 \) production asymmetries in pp collisions at \( \sqrt{s}=7 \) TeV, Phys. Lett. B 739 (2014) 218 [arXiv:1408.0275] [INSPIRE].
LHCb collaboration, Measurement of B 0 , B 0 s , B + and Λ 0 b production asymmetries in 7 and 8 TeV proton-proton collisions, arXiv:1703.08464 [INSPIRE].
LHCb collaboration, Precision measurement of the \( {B}_s^0-{\overline{B}}_s^0 \) oscillation frequency with the decay B 0 s → D − s π +, New J. Phys. 15 (2013) 053021 [arXiv:1304.4741] [INSPIRE].
F. Von Hippel and C. Quigg, Centrifugal-barrier effects in resonance partial decay widths, shapes and production amplitudes, Phys. Rev. D 5 (1972) 624 [INSPIRE].
LHCb collaboration, Observation of the decay B + c → B 0 s π +, Phys. Rev. Lett. 111 (2013) 181801 [arXiv:1308.4544] [INSPIRE].
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ArXiv ePrint: 1704.08217
Deceased (J. Blouw, I. Raniuk, P. Rodriguez Perez)
C. Baesso, M. Cruz Torres and C. Göbel are associated to Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil
J. He, X. Lyu, C. Qian, D. Vieira, Y. Zheng, L. Sun, Y. Xie, H. Yin and J. Yu are associated to Center for High Energy Physics, Tsinghua University, Beijing, China
D. A. Milanes, I. A. Monroy and J. A. Rodriguez Lopez are associated to LPNHE, Université Pierre et Marie Curie, Université Paris Diderot, CNRS/IN2P3, Paris, France
O. Grünberg, M. Heß, H. Viemann and R. Waldi are associated to Physikalisches Institut, Ruprecht-Karls-Universität Heidelberg, Heidelberg, Germany
T. Likhomanenko, A. Malinin, O. Morgunova, A. Nogay, A. Petrov and V. Shevchenko are associated to Institute of Theoretical and Experimental Physics (ITEP), Moscow, Russia
L. M. Garcia Martin, L. Henry, F. Martinez Vidal, A. Oyanguren, C. Remon Alepuz, P. Ruiz Valls and C. Sanchez Mayordomo are associated to ICCUB, Universitat de Barcelona, Barcelona, Spain
C. J. G. Onderwater is associated to Nikhef National Institute for Subatomic Physics, Amsterdam, The Netherlands
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The LHCb collaboration., Aaij, R., Adeva, B. et al. Resonances and CP violation in B 0 s and \( {\overline{B}}_s^0\to J/\psi {K}^{+}{K}^{-} \) decays in the mass region above the ϕ(1020). J. High Energ. Phys. 2017, 37 (2017). https://doi.org/10.1007/JHEP08(2017)037
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DOI: https://doi.org/10.1007/JHEP08(2017)037