CP Asymmetries
(through 8 February 2015)


Note:
In the case of D+ and Ds+ decays, the (time-integrated) CP asymmetry measures direct CP violation. In the case of D0 decays, the CP asymmetry measures direct and indirect CP violation combined. In these tables we report asymmetries for the actual final state, i.e., resonant substructure is not considered.


CP asymmetries in D0 decay modes

Year Experiment CP Asymmetry in the decay mode D0 to π+π- [Γ(D0)-Γ(D0bar)]/[Γ(D0)+Γ(D0bar)]
2014 LHCb R. Aaij et al. (LHCb Collab.), arXiv:1405.2797 (2014). -0.0020 ± 0.0019 ± 0.0010
2012 BELLE B.R. Ko et al. (BELLE Collab.), arXiv:1212.1975 (2012). +0.0055 ± 0.0036 ± 0.0009
2012 CDF T. Aaltonen et al. (CDF Collab.), Phys. Rev. D 85, 012009 (2012). +0.0022 ± 0.0024 ± 0.0011
2008 BABAR B. Aubert et al. (BABAR Collab.), Phys. Rev. Lett. 100, 061803 (2008). -0.0024 ± 0.0052 ± 0.0022
2002 CLEO S.E. Csorna et al. (CLEO Collab.), Phys. Rev. D 65, 092001 (2002). +0.019 ± 0.032 ± 0.008
2000 FOCUS J.M. Link et al. (FOCUS Collab.), Phys. Lett. B 491, 232 (2000). +0.048 ± 0.039 ± 0.025
1998 E791 E.M. Aitala et al. (E791 Collab.), Phys. Lett. B 421, 405 (1998). -0.049 ± 0.078 ± 0.030
. . COMBOS average +0.0005 ± 0.0015
Year Experiment CP Asymmetry in the decay mode D0 to π0π0 [Γ(D0)-Γ(D0bar)]/[Γ(D0)+Γ(D0bar)]
2014 BELLE N.K. Nisar et al. (BELLE Collab.), Phys. Rev. Lett. 112, 211601 (2014). -0.0003 ± 0.0064 ± 0.0010
2001 CLEO G. Bonvicini et al. (CLEO Collab.), Phys. Rev. D 63, 071101 (2001). +0.001 ± 0.048
. . COMBOS average -0.0003 ± 0.0064
Year Experiment CP Asymmetry in the decay mode D0 to K0sπ0 [Γ(D0)-Γ(D0bar)]/[Γ(D0)+Γ(D0bar)]
2014 BELLE N.K. Nisar et al. (BELLE Collab.), Phys. Rev. Lett. 112, 211601 (2014). -0.0021 ± 0.0016 ± 0.0007
2001 CLEO G. Bonvicini et al. (CLEO Collab.), Phys. Rev. D 63, 071101 (2001). +0.001 ± 0.013
. . COMBOS average -0.0020 ± 0.0017
Year Experiment CP Asymmetry in the decay mode D0 to K0sη [Γ(D0)-Γ(D0bar)]/[Γ(D0)+Γ(D0bar)]
2011 BELLE B.R. Ko et al. (BELLE Collab.), Phys. Rev. Lett. 106, 211801 (2011). +0.0054 ± 0.0051 ± 0.0016
Year Experiment CP Asymmetry in the decay mode D0 to K0sη' [Γ(D0)-Γ(D0bar)]/[Γ(D0)+Γ(D0bar)]
2011 BELLE B.R. Ko et al. (BELLE Collab.), Phys. Rev. Lett. 106, 211801 (2011). +0.0098 ± 0.0067 ± 0.0014
Year Experiment CP Asymmetry in the decay mode D0 to K0sK0s [Γ(D0)-Γ(D0bar)]/[Γ(D0)+Γ(D0bar)]
2001 CLEO G. Bonvicini et al. (CLEO Collab.), Phys. Rev. D 63, 071101 (2001). -0.23 ± 0.19
Year Experiment CP Asymmetry in the decay mode D0 to K+K- [Γ(D0)-Γ(D0bar)]/[Γ(D0)+Γ(D0bar)]
2014 LHCb R. Aaij et al. (LHCb Collab.), arXiv:1405.2797 (2014). -0.0006 ± 0.0015 ± 0.0010
2012 BELLE B.R Ko et al. (BELLE Collab.), arXiv: 1212.1975 (2012). -0.0032 ± 0.0021 ± 0.0009
2012 CDF T. Aaltonen et al. (CDF Collab.), Phys. Rev. D 85, 012009 (2012). -0.0024 ± 0.0022 ± 0.0009
2008 BABAR B. Aubert et al. (BABAR Collab.), Phys. Rev. Lett. 100, 061803 (2008). +0.0000 ± 0.0034 ± 0.0013
2002 CLEO S.E. Csorna et al. (CLEO Collab.), Phys. Rev. D 65, 092001 (2002). +0.000 ± 0.022 ± 0.008
2000 FOCUS J.M. Link et al. (FOCUS Collab.), Phys. Lett. B 491, 232 (2000). -0.001 ± 0.022 ± 0.015
1998 E791 E.M. Aitala et al. (E791 Collab.), Phys. Lett. B 421, 405 (1998). -0.010 ± 0.049 ± 0.012
. . COMBOS average -0.0016 ± 0.0012
Year Experiment CP Asymmetry in the decay mode D0 to π+π-π0 [Γ(D0)-Γ(D0bar)]/[Γ(D0)+Γ(D0bar)]
2008 BABAR B. Aubert et al. (BABAR Collab.), Phys. Rev. D 78, 051102 (2008). +0.0031 ± 0.0041 ± 0.0017
2008 BELLE K. Arinstein et al. (BELLE Collab.), Phys. Lett. B 662, 102 (2008). +0.0043 ± 0.0130
2005 CLEO D. Cronin-Hennessy et al. (CLEO Collab.), Phys. Rev. D 72, 031102 (2005). +0.01 (+0.09 -0.07) ± 0.05
. . COMBOS average +0.0032 ± 0.0042
Year Experiment CP Asymmetry in the decay mode D0 to K-π+π0 [Γ(D0)-Γ(D0bar)]/[Γ(D0)+Γ(D0bar)]
2014 CLEO-c G. Bonvicini et al. (CLEO Collab.), Phys. Rev. D 89, 072002 (2014). +0.001 ± 0.003 ± 0.004
2001 CLEO S. Kopp et al. (CLEO Collab.), Phys. Rev. D 63, 092001 (2001). -0.031 ± 0.086
. . COMBOS average +0.0009 ± 0.0050
Year Experiment CP Asymmetry in the decay mode D0 to K+π-π0 [Γ(D0)-Γ(D0bar)]/[Γ(D0)+Γ(D0bar)]
2005 BELLE X.C. Tian et al. (BELLE Collab.), Phys. Rev. Lett. 95, 231801 (2005). -0.006 ± 0.053
2001 CLEO G. Brandenburg et al. (CLEO Collab.), Phys. Rev. Lett. 87, 071802 (2001). +0.09 (+0.25 -0.22)
. . COMBOS average -0.0014 ± 0.0517
Year Experiment CP Asymmetry in the decay mode D0 to K0sπ+π- [Γ(D0)-Γ(D0bar)]/[Γ(D0)+Γ(D0bar)]
2012 CDF T. Aaltonen et al. (CDF Collab.), Phys. Rev. D 86, 032007 (2012). -0.0005 ± 0.0057 ± 0.0054
2004 CLEO D.M. Asner et al. (CLEO Collab.), Phys. Rev. D 70, 091101 (2004). -0.009 ± 0.021 (+0.016 -0.057)
. . COMBOS average -0.0008 ± 0.0077
Year Experiment CP Asymmetry in the decay mode D0 to K-K+π0 [Γ(D0)-Γ(D0bar)]/[Γ(D0)+Γ(D0bar)]
2008 BABAR B. Aubert et al. (BABAR Collab.), Phys. Rev. D 78, 051102 (2008). -0.0100 ± 0.0167 ± 0.0025
Year Experiment CP Asymmetry in the decay mode D0 to π-π+π+π- [Amplitude analysis]
2013 LHCb R. Aaij et al. (LHCb Collab.), Phys. Lett. B 726, 623 (2013). No evidence for CP violation
Year Experiment CP Asymmetry in the decay mode D0 to K+π-π+π- [Γ(D0)-Γ(D0bar)]/[Γ(D0)+Γ(D0bar)]
2005 BELLE X.C. Tian et al. (BELLE Collab.), Phys. Rev. Lett. 95, 231801 (2005). -0.018 ± 0.044
Year Experiment CP Asymmetry in the decay mode D0 to K+K-π+π- [Γ(D0)-Γ(D0bar)]/[Γ(D0)+Γ(D0bar)]
2013 LHCb R. Aaij et al. (LHCb Collab.), Phys. Lett. B 726, 623 (2013). Amplitude analysis, no evidence for CP violation
2005 FOCUS J.M. Link et al. (FOCUS Collab.), Phys. Lett. B 622, 239 (2005). -0.082 ± 0.056 ± 0.047

For lifetime asymmetries of D0 decays to CP eigenstates, see Results for AΓ and ΔACP


CP asymmetries in D+ decay modes

Year Experiment CP Asymmetry in the decay mode D+ to μ+ν [Γ(D+)-Γ(D-)]/[Γ(D+)+Γ(D-)]
2008 CLEO-c B.I. Eisenstein et al. (CLEO Collab.), Phys. Rev. D 78, 052003 (2008). +0.08 ± 0.08
Year Experiment CP Asymmetry in the decay mode D+ to π+π0 [Γ(D+)-Γ(D-)]/[Γ(D+)+Γ(D-)]
2010 CLEO-c H. Mendez et al. (CLEO Collab.), Phys. Rev. D 81, 052013 (2010). +0.029 ± 0.029 ± 0.003
Year Experiment CP Asymmetry in the decay mode D+ to π+η [Γ(D+)-Γ(D-)]/[Γ(D+)+Γ(D-)]
2011 BELLE E. Won et al. (BELLE Collab.), Phys. Rev. Lett. 107, 221801 (2011). +0.0174 ± 0.0113 ± 0.0019
2010 CLEO-c H. Mendez et al. (CLEO Collab.), Phys. Rev. D 81, 052013 (2010). -0.020 ± 0.023 ± 0.003
. . COMBOS average +0.010 ± 0.010
Year Experiment CP Asymmetry in the decay mode D+ to π+η' [Γ(D+)-Γ(D-)]/[Γ(D+)+Γ(D-)]
2011 BELLE E. Won et al. (BELLE Collab.), Phys. Rev. Lett. 107, 221801 (2011). -0.0012 ± 0.0112 ± 0.0017
2010 CLEO-c H. Mendez et al. (CLEO Collab.), Phys. Rev. D 81, 052013 (2010). -0.040 ± 0.034 ± 0.003
. . COMBOS average -0.005 ± 0.011
Year Experiment CP Asymmetry in the decay mode D+ to K+π0 [Γ(D+)-Γ(D-)]/[Γ(D+)+Γ(D-)]
2010 CLEO-c H. Mendez et al. (CLEO Collab.), Phys. Rev. D 81, 052013 (2010). -0.035 ± 0.107 ± 0.009
Year Experiment CP Asymmetry in the decay mode D+ to K0sπ+ [Γ(D+)-Γ(D-)]/[Γ(D+)+Γ(D-)]
2014 CLEO-c G. Bonvicini et al. (CLEO Collab.), Phys. Rev. D 89, 072002 (2014). -0.011 ± 0.006 ± 0.002
2012 BELLE B.R. Ko et al. (BELLE Collab.), Phys. Rev. Lett. 109, 021601 (2012). -0.00363 ± 0.00094 ± 0.00067
2011 BABAR P. del Amo Sanchez et al. (BABAR Collab.), Phys. Rev. D 83, 071103 (2011). -0.0044 ± 0.0013 ± 0.0010
2002 FOCUS J.M. Link et al. (FOCUS Collab.), Phys. Rev. Lett. 88, 041602 (2002). -0.016 ± 0.015 ± 0.009
. . COMBOS average -0.0041 ± 0.0009
Year Experiment CP Asymmetry in the decay mode D+ to K0sK+ [Γ(D+)-Γ(D-)]/[Γ(D+)+Γ(D-)]
2014 LHCb R. Aaij et al. (LHCb Collab.), arXiv:1406.2624 (2014). +0.0003 ± 0.0017 ± 0.0014
2013 BABAR J.P. Lees et al. (BABAR Collab.), Phys. Rev. D 87, 052012 (2013). +0.0013 ± 0.0036 ± 0.0025
2013 BELLE B.R. Ko et al. (BELLE Collab.), JHEP 02, 098 (2013). -0.0025 ± 0.0028 ± 0.0014
2010 CLEO-c H. Mendez et al. (CLEO Collab.), Phys. Rev. D 81, 052013 (2010). -0.002 ± 0.015 ± 0.009
2002 FOCUS J.M. Link et al. (FOCUS Collab.), Phys. Rev. Lett. 88, 041602 (2002). +0.071 ± 0.061 ± 0.012
. . COMBOS average -0.0003 ± 0.0017
Year Experiment CP Asymmetry in the decay mode D+ to π+π-π+ [Γ(D+)-Γ(D-)]/[Γ(D+)+Γ(D-)]
2014 LHCb R. Aaij et al. (LHCb Collab.), Phys. Lett. B 728, 585 (2014). Dalitz plot analysis, no evidence for CP violation
1997 E791 E.M. Aitala et al. (E791 Collab.), Phys. Lett. B 403, 377 (1997). -0.017 ± 0.042
Year Experiment CP Asymmetry in the decay mode D+ to K-π+π+ [Γ(D+)-Γ(D-)]/[Γ(D+)+Γ(D-)]
2014 CLEO-c G. Bonvicini et al. (CLEO Collab.), Phys. Rev. D 89, 072002 (2014). -0.003 ± 0.002 ± 0.004
Year Experiment CP Asymmetry in the decay mode D+ to K0sπ+π0 [Γ(D+)-Γ(D-)]/[Γ(D+)+Γ(D-)]
2014 CLEO-c G. Bonvicini et al. (CLEO Collab.), Phys. Rev. D 89, 072002 (2014). -0.001 ± 0.007 ± 0.002
Year Experiment CP Asymmetry in the decay mode D+ to K+K-π+ [Γ(D+)-Γ(D-)]/[Γ(D+)+Γ(D-)]
2014 CLEO-c G. Bonvicini et al. (CLEO Collab.), Phys. Rev. D 89, 072002 (2014). -0.001 ± 0.009 ± 0.004
2013 BABAR J.P. Lees et al. (BABAR Collab.), Phys. Rev. D 87, 052010 (2013). +0.0037 ± 0.0030 ± 0.0015
2008 CLEO-c P. Rubin et al. (CLEO-c Collab.), Phys. Rev. D 78, 072003 (2008). Dalitz plot analysis, no evidence for CP violation
2000 FOCUS J.M. Link et al. (FOCUS Collab.), Phys. Lett. B 491, 232 (2000). +0.006 ± 0.011 ± 0.005
1997 E791 E.M. Aitala et al. (E791 Collab.), Phys. Lett. B 403, 377 (1997). -0.014 ± 0.029
. . COMBOS average +0.0032 ± 0.0031
Year Experiment CP Asymmetry in the decay mode D+ to K-π+π+π0 [Γ(D+)-Γ(D-)]/[Γ(D+)+Γ(D-)]
2014 CLEO-c G. Bonvicini et al. (CLEO Collab.), Phys. Rev. D 89, 072002 (2014). -0.003 ± 0.006 ± 0.004
Year Experiment CP Asymmetry in the decay mode D+ to K0sπ+π+π- [Γ(D+)-Γ(D-)]/[Γ(D+)+Γ(D-)]
2014 CLEO-c G. Bonvicini et al. (CLEO Collab.), Phys. Rev. D 89, 072002 (2014). +0.000 ± 0.012 ± 0.003
Year Experiment CP Asymmetry in the decay mode D+ to K0sK+π+π- [Γ(D+)-Γ(D-)]/[Γ(D+)+Γ(D-)]
2005 FOCUS J.M. Link et al. (FOCUS Collab.), Phys. Lett. B 622, 239 (2005). -0.042 ± 0.064 ± 0.022


CP asymmetries in Ds decay modes

Year Experiment CP Asymmetry in the decay mode Ds+ to μ+ν [Γ(Ds+)-Γ(Ds-)]/[Γ(Ds+)+Γ(Ds-)]
2009 CLEO-c J.P. Alexander et al. (CLEO Collab.), Phys. Rev. D 79, 052001 (2009). +0.048 ± 0.061
Year Experiment CP Asymmetry in the decay mode Ds+ to π+η [Γ(Ds+)-Γ(Ds-)]/[Γ(Ds+)+Γ(Ds-)]
2013 CLEO-c P.U.E. Onyisi et al. (CLEO Collab.), Phys. Rev. D 88, 032009 (2013). +0.011 ± 0.030 ± 0.008
Year Experiment CP Asymmetry in the decay mode Ds+ to π+η' [Γ(Ds+)-Γ(Ds-)]/[Γ(Ds+)+Γ(Ds-)]
2013 CLEO-c P.U.E. Onyisi et al. (CLEO Collab.), Phys. Rev. D 88, 032009 (2013). -0.022 ± 0.022 ± 0.006
Year Experiment CP Asymmetry in the decay mode Ds+ to K0sπ+ [Γ(Ds+)-Γ(Ds-)]/[Γ(Ds+)+Γ(Ds-)]
2014 LHCb R. Aaij et al. (LHCb Collab.), arXiv:1406.2624 (2014). +0.0038 ± 0.0046 ± 0.0017
2013 BABAR J.P. Lees et al. (BABAR Collab.), Phys. Rev. D 87, 052012 (2013). +0.006 ± 0.020 ± 0.003
2010 BELLE B.R. Ko et al. (BELLE Collab.), Phys. Rev. Lett. 104, 181602 (2010). +0.0545 ± 0.0250 ± 0.0033
2010 CLEO-c H. Mendez et al. (CLEO Collab.), Phys. Rev. D 81, 052013 (2010). +0.163 ± 0.073 ± 0.003
. . COMBOS average +0.0063 ± 0.0047
Year Experiment CP Asymmetry in the decay mode Ds+ to K0sK+ [Γ(Ds+)-Γ(Ds-)]/[Γ(Ds+)+Γ(Ds-)]
2013 CLEO-c P.U.E. Onyisi et al. (CLEO Collab.), Phys. Rev. D 88, 032009 (2013). +0.026 ± 0.015 ± 0.006
2013 BABAR J.P. Lees et al. (BABAR Collab.), Phys. Rev. D 87, 052012 (2013). -0.0005 ± 0.0023 ± 0.0024
2010 BELLE B.R. Ko et al. (BELLE Collab.), Phys. Rev. Lett. 104, 181602 (2010). +0.0012 ± 0.0036 ± 0.0022
. . COMBOS average +0.0008 ± 0.0026
Year Experiment CP Asymmetry in the decay mode Ds+ to K+π0 [Γ(Ds+)-Γ(Ds-)]/[Γ(Ds+)+Γ(Ds-)]
2010 CLEO-c H. Mendez et al. (CLEO Collab.), Phys. Rev. D 81, 052013 (2010). -0.266 ± 0.238 ± 0.009
Year Experiment CP Asymmetry in the decay mode Ds+ to K+η [Γ(Ds+)-Γ(Ds-)]/[Γ(Ds+)+Γ(Ds-)]
2010 CLEO-c H. Mendez et al. (CLEO Collab.), Phys. Rev. D 81, 052013 (2010). +0.093 ± 0.152 ± 0.009
Year Experiment CP Asymmetry in the decay mode Ds+ to K+η' [Γ(Ds+)-Γ(Ds-)]/[Γ(Ds+)+Γ(Ds-)]
2010 CLEO-c H. Mendez et al. (CLEO Collab.), Phys. Rev. D 81, 052013 (2010). +0.060 ± 0.189 ± 0.009
Year Experiment CP Asymmetry in the decay mode Ds+ to π+π+π- [Γ(Ds+)-Γ(Ds-)]/[Γ(Ds+)+Γ(Ds-)]
2013 CLEO-c P.U.E. Onyisi et al. (CLEO Collab.), Phys. Rev. D 88, 032009 (2013). -0.007 ± 0.030 ± 0.006
Year Experiment CP Asymmetry in the decay mode Ds+ to π+π0η [Γ(Ds+)-Γ(Ds-)]/[Γ(Ds+)+Γ(Ds-)]
2013 CLEO-c P.U.E. Onyisi et al. (CLEO Collab.), Phys. Rev. D 88, 032009 (2013). -0.005 ± 0.039 ± 0.020
Year Experiment CP Asymmetry in the decay mode Ds+ to π+π0η' [Γ(Ds+)-Γ(Ds-)]/[Γ(Ds+)+Γ(Ds-)]
2013 CLEO-c P.U.E. Onyisi et al. (CLEO Collab.), Phys. Rev. D 88, 032009 (2013). -0.004 ± 0.074 ± 0.019
Year Experiment CP Asymmetry in the decay mode Ds+ to K0sK+π0 [Γ(Ds+)-Γ(Ds-)]/[Γ(Ds+)+Γ(Ds-)]
2013 CLEO-c P.U.E. Onyisi et al. (CLEO Collab.), Phys. Rev. D 88, 032009 (2013). -0.016 ± 0.060 ± 0.011
Year Experiment CP Asymmetry in the decay mode Ds+ to K0sK0sπ+ [Γ(Ds+)-Γ(Ds-)]/[Γ(Ds+)+Γ(Ds-)]
2013 CLEO-c P.U.E. Onyisi et al. (CLEO Collab.), Phys. Rev. D 88, 032009 (2013). +0.031 ± 0.052 ± 0.006
Year Experiment CP Asymmetry in the decay mode Ds+ to K+π+π- [Γ(Ds+)-Γ(Ds-)]/[Γ(Ds+)+Γ(Ds-)]
2013 CLEO-c P.U.E. Onyisi et al. (CLEO Collab.), Phys. Rev. D 88, 032009 (2013). +0.045 ± 0.048 ± 0.006
Year Experiment CP Asymmetry in the decay mode Ds+ to K+K-π+ [Γ(Ds+)-Γ(Ds-)]/[Γ(Ds+)+Γ(Ds-)]
2013 CLEO-c P.U.E. Onyisi et al. (CLEO Collab.), Phys. Rev. D 88, 032009 (2013). -0.005 ± 0.008 ± 0.004
Year Experiment CP Asymmetry in the decay mode Ds+ to K0sK-π+π+ [Γ(Ds+)-Γ(Ds-)]/[Γ(Ds+)+Γ(Ds-)]
2013 CLEO-c P.U.E. Onyisi et al. (CLEO Collab.), Phys. Rev. D 88, 032009 (2013). +0.041 ± 0.027 ± 0.009
Year Experiment CP Asymmetry in the decay mode Ds+ to K0sK+π+π- [Γ(Ds+)-Γ(Ds-)]/[Γ(Ds+)+Γ(Ds-)]
2013 CLEO-c P.U.E. Onyisi et al. (CLEO Collab.), Phys. Rev. D 88, 032009 (2013). -0.057 ± 0.053 ± 0.009
Year Experiment CP Asymmetry in the decay mode Ds+ to K+K-π+π0 [Γ(Ds+)-Γ(Ds-)]/[Γ(Ds+)+Γ(Ds-)]
2013 CLEO-c P.U.E. Onyisi et al. (CLEO Collab.), Phys. Rev. D 88, 032009 (2013). +0.000 ± 0.027 ± 0.012

 

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