Abstract
Measurements of CP observables in B± → DK*± decays are presented, where D denotes a superposition of D0 and \( {\overline{D}}^0 \) meson states. Decays of the D meson to K−π+, K−K+, π−π+, K−π+π−π+ and π−π+π−π+ are used and the K*± meson is reconstructed in the K 0 S π± final state. This analysis uses a data sample of pp collisions collected with the LHCb experiment, corresponding to integrated luminosities of 1 fb−1, 2 fb−1 and 1.8 fb−1 at centre-of-mass energies \( \sqrt{s}=7 \) TeV, 8 TeV and 13 TeV, respectively. The sensitivity of the results to the CKM angle γ is discussed.
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10 May 2018
The measurements of Aππ and RKK in B± → DK*± decays were incorrectly reported in the paper [1], due to a transposition of the systematic uncertainties. This error was present in the reporting of the individual systematic uncertainties, the correlation matrix, and in the calculation of RCP+.
10 May 2018
The measurements of A?? and RKK in B? ? DK*? decays were incorrectly reported in the paper [1], due to a transposition of the systematic uncertainties. This error was present in the reporting of the individual systematic uncertainties, the correlation matrix, and in the calculation of RCP+.
10 May 2018
The measurements of A���� and RKK in B�� ��� DK*�� decays were incorrectly reported in the paper [1], due to a transposition of the systematic uncertainties. This error was present in the reporting of the individual systematic uncertainties, the correlation matrix, and in the calculation of RCP+.
References
N. Cabibbo, Unitary symmetry and leptonic decays, Phys. Rev. Lett. 10 (1963) 531 [INSPIRE].
M. Kobayashi and T. Maskawa, CP violation in the renormalizable theory of weak interaction, Prog. Theor. Phys. 49 (1973) 652 [INSPIRE].
C. Jarlskog, Commutator of the quark mass matrices in the standard electroweak model and a measure of maximal CP-violation, Phys. Rev. Lett. 55 (1985) 1039 [INSPIRE].
LHCb collaboration, Measurement of the CKM angle γ from a combination of LHCb results, JHEP 12 (2016) 087 [arXiv:1611.03076] [LHCb-PAPER-2016-032] [CERN-EP-2016-270] [INSPIRE].
CKMfitter Group collaboration, J. Charles et al., CP violation and the CKM matrix: assessing the impact of the asymmetric B factories, Eur. Phys. J. C 41 (2005) 1 [hep-ph/0406184] [INSPIRE].
LHCb collaboration, Measurement of CP observables in B ± → DK ± and B ± → Dπ ± with two- and four-body D decays, Phys. Lett. B 760 (2016) 117 [arXiv:1603.08993] [LHCb-PAPER-2016-003] [CERN-EP-2016-065] [INSPIRE].
LHCb collaboration, Measurement of the CKM angle γ using B ± → DK ± with D → K 0S π + π −, K 0S K + K − decays, JHEP 10 (2014) 097 [arXiv:1408.2748] [LHCb-PAPER-2014-041] [CERN-PH-EP-2014-202] [INSPIRE].
LHCb collaboration, A study of CP violation in B ∓ → Dh ∓ (h = K, π) with the modes D → K ∓ π ± π 0 , D → π + π − π 0 and D → K + K − π 0, Phys. Rev. D 91 (2015) 112014 [arXiv:1504.05442] [CERN-PH-EP-2015-097] [LHCb-PAPER-2015-014] [INSPIRE].
M. Gronau and D. London, How to determine all the angles of the unitarity triangle from B 0 d → DK S and B 0 s → Dϕ, Phys. Lett. B 253 (1991) 483 [INSPIRE].
M. Gronau and D. Wyler, On determining a weak phase from CP asymmetries in charged B decays, Phys. Lett. B 265 (1991) 172 [INSPIRE].
D. Atwood, I. Dunietz and A. Soni, Enhanced CP-violation with \( B\to K{D}^0\left({\overline{D}}^0\right) \) modes and extraction of the CKM angle γ, Phys. Rev. Lett. 78 (1997) 3257 [hep-ph/9612433] [INSPIRE].
D. Atwood, I. Dunietz and A. Soni, Improved methods for observing CP-violation in B ± → KD and measuring the CKM phase γ, Phys. Rev. D 63 (2001) 036005 [hep-ph/0008090] [INSPIRE].
LHCb collaboration, Measurement of CP-violation parameters in B 0 → DK *0 decays, Phys. Rev. D 90 (2014) 112002 [arXiv:1407.8136] [LHCb-PAPER-2014-028] [CERN-PH-EP-2014-182] [INSPIRE].
D. Atwood and A. Soni, Role of charm factory in extracting CKM phase information via B → DK, Phys. Rev. D 68 (2003) 033003 [hep-ph/0304085] [INSPIRE].
S. Malde et al., First determination of the CP content of D → π + π − π + π − and updated determination of the CP contents of D → π + π − π 0 and D → K + K − π 0 , Phys. Lett. B 747 (2015) 9 [arXiv:1504.05878] [INSPIRE].
BaBar collaboration, B. Aubert et al., Measurement of CP-violation observables and parameters for the decays B ± → DK *±, Phys. Rev. D 80 (2009) 092001 [arXiv:0909.3981] [INSPIRE].
BaBar collaboration, B. Aubert et al., Improved measurement of the CKM angle γ in B ∓ → D (*) K (*∓) decays with a Dalitz plot analysis of D decays to K 0 S π + π − and K 0 S K + K −, Phys. Rev. D 78 (2008) 034023 [arXiv:0804.2089] [INSPIRE].
Belle collaboration, A. Poluektov et al., Measurement of ϕ 3 with a Dalitz plot analysis of B + → D (∗) K (∗)+ decay, Phys. Rev. D 73 (2006) 112009 [hep-ex/0604054] [INSPIRE].
W. Wang, CP violation effects on the measurement of the Cabibbo-Kobayashi-Maskawa angle γ from B → DK, Phys. Rev. Lett. 110 (2013) 061802 [arXiv:1211.4539] [INSPIRE].
M. Gronau, Improving bounds on γ in B ± → DK ± and B ±,0 → DX ±,0 s , Phys. Lett. B 557 (2003) 198 [hep-ph/0211282] [INSPIRE].
M. Rama, Effect of \( D\hbox{-} \overline{D} \) mixing in the extraction of gamma with B − → D 0 K − and B − → D 0 π − decays, Phys. Rev. D 89 (2014) 014021 [arXiv:1307.4384] [INSPIRE].
Y. Amhis et al., Averages of b-hadron, c-hadron and τ-lepton properties as of summer 2016, arXiv:1612.07233 [INSPIRE].
T. Evans, S. Harnew, J. Libby, S. Malde, J. Rademacker and G. Wilkinson, Improved determination of the D → K − π + π + π − coherence factor and associated hadronic parameters from a combination of \( {e}^{+}{e}^{-}\to \psi (3770)\to c\overline{c}\kern0.5em and\kern0.5em pp\to c\overline{c}X \) data, Phys. Lett. B 757 (2016) 520 [Erratum ibid. B 765 (2017) 402] [arXiv:1602.07430] [INSPIRE].
LHCb collaboration, First observation of \( {D}^0-{\overline{D}}^0 \) oscillations in D 0 → K + π − π + π − decays and measurement of the associated coherence parameters, Phys. Rev. Lett. 116 (2016) 241801 [arXiv:1602.07224] [LHCb-PAPER-2015-057] [CERN-EP-2016-021] [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].
V.V. Gligorov and M. Williams, Efficient, reliable and fast high-level triggering using a bonsai boosted decision tree, 2013 JINST 8 P02013 [arXiv:1210.6861] [INSPIRE].
LHCb collaboration, Measurement of forward J/ψ production cross-sections in pp collisions at \( \sqrt{s}=13 \) TeV, JHEP 10 (2015) 172 [Erratum ibid. 05 (2017) 063] [arXiv:1509.00771] [LHCb-PAPER-2015-037] [CERN-PH-EP-2015-222] [INSPIRE].
LHCb RICH Group collaboration, M. Adinolfi et al., Performance of the LHCb RICH detector at the LHC, Eur. Phys. J. C 73 (2013) 2431 [arXiv:1211.6759] [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].
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].
M. Clemencic et al., The LHCb simulation application, Gauss: design, evolution and experience, J. Phys. Conf. Ser. 331 (2011) 032023 [INSPIRE].
Particle Data Group collaboration, C. Patrignani et al., Review of particle physics, Chin. Phys. C 40 (2016) 100001 [INSPIRE].
W.D. Hulsbergen, Decay chain fitting with a Kalman filter, Nucl. Instrum. Meth. A 552 (2005) 566 [physics/0503191] [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].
T. Skwarnicki, A study of the radiative cascade transitions between the Upsilon-prime and Upsilon resonances, Ph.D. thesis, Institute of Nuclear Physics, Krakow Poland, (1986) [INSPIRE].
LHCb collaboration, Measurement of CP observables in B ± → D (*) K ± and B ± → D (*) π ± decays, arXiv:1708.06370 [LHCb-PAPER-2017-021] [CERN-EP-2017-195] [INSPIRE].
LHCb collaboration, Model-independent measurement of the CKM angle γ using B 0 → DK *0 decays with D → K 0 S π + π − and K 0 S K + K −, JHEP 06 (2016) 131 [arXiv:1604.01525] [LHCb-PAPER-2016-006] [CERN-EP-2016-083] [INSPIRE].
LHCb collaboration, Measurement of the B ± production asymmetry and the CP asymmetry in B ± → J/ψK ± decays, Phys. Rev. D 95 (2017) 052005 [arXiv:1701.05501] [LHCb-PAPER-2016-054] [CERN-EP-2016-325] [INSPIRE].
LHCb collaboration, Measurement of CP asymmetry in D 0 → K − K + and D 0 → π − π + decays, JHEP 07 (2014) 041 [arXiv:1405.2797] [CERN-PH-EP-2014-082] [LHCb-PAPER-2014-013] [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] [CERN-PH-EP-2012-114] [LHCb-PAPER-2012-009] [INSPIRE].
S.S. Wilks, The large-sample distribution of the likelihood ratio for testing composite hypotheses, Ann. Math. Statist. 9 (1938) 60 [INSPIRE].
LHCb collaboration, Dalitz plot analysis of \( {B}_s^0\to {\overline{D}}^0{K}^{-}{\pi}^{+} \) decays, Phys. Rev. D 90 (2014) 072003 [arXiv:1407.7712] [LHCb-PAPER-2014-036] [CERN-PH-EP-2014-184] [INSPIRE].
T. Latham, J. Back and P. Harrison, Laura++, a Dalitz plot fitting package, https://laura.hepforge.org/.
D. Aston et al., A study of K − π + scattering in the reaction K − p → K − π + n at 11 GeV/c, Nucl. Phys. B 296 (1988) 493 [INSPIRE].
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ArXiv ePrint: 1709.05855
Deceased (I. Raniuk)
C. Baesso and C. Göbel are associated to Universidade Federal do Rio de Janeiro (UFRJ), Rio de Janeiro, Brazil
N. Beliy, J. He, P.-R. Li, X. Lyu, M. Szymanski, D. Vieira, Y. Zheng, H. Cai, L. Sun, B. Dey, W. Hu, Y. Xie, M. Xu, 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, N. Meinert, 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, V. Shevchenko and A. Vagner 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, J. Ruiz Vidal 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. Measurement of CP observables in B± → DK*± decays using two- and four-body D final states. J. High Energ. Phys. 2017, 156 (2017). https://doi.org/10.1007/JHEP11(2017)156
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DOI: https://doi.org/10.1007/JHEP11(2017)156