Abstract
The first model-independent measurement of the charm mixing parameters in the decay D 0 → K 0S π + π − is reported, using a sample of pp collision data recorded by the LHCb experiment, corresponding to an integrated luminosity of 1.0 fb−1 at a centre-of-mass energy of 7 TeV. The measured values are
where the first uncertainties are statistical and include small contributions due to the external input for the strong phase measured by the CLEO collaboration, and the second uncertainties are systematic.
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References
LHCb collaboration, Observation of \( {D}^0-{\overline{D}}^0 \) oscillations, Phys. Rev. Lett. 110 (2013) 101802 [arXiv:1211.1230] [INSPIRE].
CDF collaboration, T.A. Aaltonen et al., Observation of \( {D}^0-{\overline{D}}^0 \) Mixing Using the CDF II Detector, Phys. Rev. Lett. 111 (2013) 231802 [arXiv:1309.4078] [INSPIRE].
LHCb collaboration, Measurement of \( {D}^0-{\overline{D}}^0 \) Mixing Parameters and Search for CP Violation Using D 0 → K + π − Decays, Phys. Rev. Lett. 111 (2013) 251801 [arXiv:1309.6534] [INSPIRE].
Belle collaboration, B.R. Ko et al., Observation of \( {D}^0-{\overline{D}}^0 \) Mixing in e + e − Collisions, Phys. Rev. Lett. 112 (2014) 111801 [arXiv:1401.3402] [INSPIRE].
Heavy Flavor Averaging Group (HFAG) collaboration, Y. Amhis et al., Averages of b-hadron, c-hadron and τ-lepton properties as of summer 2014, arXiv:1412.7515 [INSPIRE] and updated results and plots available at http://www.slac.stanford.edu/xorg/hfag/.
CLEO collaboration, D.M. Asner et al., Search for \( {D}^0-{\overline{D}}^0 \) mixing in the Dalitz plot analysis of D 0 → K 0S π + π −, Phys. Rev. D 72 (2005) 012001 [hep-ex/0503045] [INSPIRE].
BaBar collaboration, P. del Amo Sanchez et al., Measurement of \( {D}^0-{\overline{D}}^0 \) mixing parameters using D 0 → K 0S π + π − and D 0 → K 0S K + K − decays, Phys. Rev. Lett. 105 (2010) 081803 [arXiv:1004.5053] [INSPIRE].
Belle collaboration, T. Peng et al., Measurement of \( {D}^0-{\overline{D}}^0 \) mixing and search for indirect CP-violation using D 0 → K 0S π + π − decays, Phys. Rev. D 89 (2014) 091103 [arXiv:1404.2412] [INSPIRE].
CLEO collaboration, H. Muramatsu et al., Dalitz analysis of D 0 → K 0S π + π −, Phys. Rev. Lett. 89 (2002) 251802 [Erratum ibid. 90 (2003) 059901] [hep-ex/0207067] [INSPIRE].
CDF collaboration, T.A. Aaltonen et al., Measurement of CP-violation asymmetries in D 0 → K S π + π −, Phys. Rev. D 86 (2012) 032007 [arXiv:1207.0825] [INSPIRE].
A. Bondar, A. Poluektov and V. Vorobiev, Charm mixing in the model-independent analysis of correlated \( {D}^0{\overline{D}}^0 \) decays, Phys. Rev. D 82 (2010) 034033 [arXiv:1004.2350] [INSPIRE].
A. Giri, Y. Grossman, A. Soffer and J. Zupan, Determining γ using B ± → DK± with multibody D decays, Phys. Rev. D 68 (2003) 054018 [hep-ph/0303187] [INSPIRE].
CLEO collaboration, J. Libby et al., Model-independent determination of the strong-phase difference between D 0 and \( {\overline{D}}^0\to {K}_{S,L}^0{h}^{+}{h}^{-}\left(h=\pi, K\right) \) and its impact on the measurement of the CKM angle γ/ϕ 3, Phys. Rev. D 82 (2010) 112006 [arXiv:1010.2817] [INSPIRE].
BESIII collaboration, M. Ablikim et al., Design and Construction of the BESIII Detector, Nucl. Instrum. Meth. A 614 (2010) 345 [arXiv:0911.4960] [INSPIRE].
C. Thomas and G. Wilkinson, Model-independent \( {D}^0-{\overline{D}}^0 \) mixing and CP-violation studies with D 0 → K 0S π + π − and D 0 → K 0S K + K −, JHEP 10 (2012) 185 [arXiv:1209.0172] [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].
R. Aaij et al., The LHCb Trigger and its Performance in 2011, 2013 JINST 8 P04022 [arXiv:1211.3055] [INSPIRE].
Particle Data Group collaboration, K.A. Olive et al., Review of Particle Physics, Chin. Phys. C 38 (2014) 090001 [INSPIRE].
T. Sjöstrand, S. Mrenna and P.Z. Skands, PYTHIA 6.4 Physics and Manual, JHEP 05 (2006) 026 [hep-ph/0603175] [INSPIRE].
LHCb collaboration, Handling of the generation of primary events in Gauss, the LHCb simulation framework, J. Phys. Conf. Ser. 331 (2011) 032047 [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].
GEANT4 collaboration, 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].
T. Skwarnicki, A study of the radiative cascade transitions between the Upsilon-prime and Upsilon resonances, Ph.D. Thesis, Institute of Nuclear Physics, Krakow (1986) [DESY-F31-86-02] [INSPIRE].
V.V. Gligorov et al., Swimming: A data driven acceptance correction algorithm, J. Phys. Conf. Ser. 396 (2012) 022016 [INSPIRE].
LHCb collaboration, Measurement of mixing and CP-violation parameters in two-body charm decays, JHEP 04 (2012) 129 [arXiv:1112.4698] [INSPIRE].
LHCb collaboration, Measurements of indirect CP asymmetries in D 0 → K − K + and D 0 → π − π + decays, Phys. Rev. Lett. 112 (2014) 041801 [arXiv:1310.7201] [INSPIRE].
NA11 collaboration, R. Bailey et al., Measurement of the lifetime of charged and neutral D mesons with high resolution silicon strip detectors, Z. Phys. C 28 (1985) 357 [INSPIRE].
DELPHI collaboration, W. Adam et al., Lifetimes of charged and neutral B hadrons using event topology, Z. Phys. C 68 (1995) 363 [INSPIRE].
J. Rademacker, Reduction of statistical power per event due to upper lifetime cuts in lifetime measurements, Nucl. Instrum. Meth. A 570 (2007) 525 [hep-ex/0502042] [INSPIRE].
CDF collaboration, T.A. Aaltonen et al., Measurement of the B − lifetime using a simulation free approach for trigger bias correction, Phys. Rev. D 83 (2011) 032008 [arXiv:1004.4855] [INSPIRE].
D. Scott, Multivariate density estimation: Theory, practice, and visualization, John Wiley and Sons, Inc. (1992).
T. Gershon, J. Libby and G. Wilkinson, Contributions to the width difference in the neutral D system from hadronic decays, Phys. Lett. B 750 (2015) 338 [arXiv:1506.08594] [INSPIRE].
G. Punzi, Comments on likelihood fits with variable resolution, eConf C 030908 (2003) WELT002 [physics/0401045] [INSPIRE].
LHCb collaboration, Measurement of the D + s − D − s production asymmetry in 7 TeV pp collisions, Phys. Lett. B 713 (2012) 186 [arXiv:1205.0897] [INSPIRE].
J. Garra Tico, The cfit fitting package, http://www.github.com/cfit.
LHCb collaboration, Implications of LHCb measurements and future prospects, Eur. Phys. J. C 73 (2013) 2373 [arXiv:1208.3355] [INSPIRE].
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ArXiv ePrint: 1510.01664
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The LHCb collaboration., Aaij, R., Abellán Beteta, C. et al. Model-independent measurement of mixing parameters in D0 → K 0S π+π− decays. J. High Energ. Phys. 2016, 33 (2016). https://doi.org/10.1007/JHEP04(2016)033
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DOI: https://doi.org/10.1007/JHEP04(2016)033