CP Asymmetries
(through January 2019)


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


CP Asymmetries in D0 decays

Year Experiment CP Asymmetry in the decay mode D0 to π+π- [Γ(D0)-Γ(D0bar)]/[Γ(D0)+Γ(D0bar)]
2017 LHCb R. Aaij et al. (LHCb Collab.), Phys. Lett.B 767 177 (2017). +0.0007 ± 0.0014 ± 0.0011
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
2008 BELLE M. Staric et al. (BELLE Collab.), Phys. Lett.B 670, 190 (2008). +0.0043 ± 0.0052 ± 0.0012
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
HFLAV average -0.0001 ± 0.0014

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
HFLAV 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
HFLAV 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)]
2018 LHCb R. Aaij et al. (LHCb Collab.), JHEP 11, 048 (2018). +0.023 ± 0.028 ± 0.009
2017 LHCb N. Dash et al. (BELLE Collab.), JHEP 10, 055 (2015). -0.0002 ± 0.0153 ± 0.0002 ± 0.0017
2001 CLEO G. Bonvicini et al. (CLEO Collab.), Phys. Rev. D 63, 071101 (2001). -0.23 ± 0.19
HFLAV average +0.004 ± 0.014

Year Experiment CP Asymmetry in the decay mode D0 to K-π+ [Γ(D0)-Γ(D0bar)]/[Γ(D0)+Γ(D0bar)]
2014 CLEO G. Bonvicini et al. (CLEO Collab.), Phys. Rev. D 89, 072002 (2014). +0.003 ± 0.003 ± 0.006

Year Experiment CP Asymmetry in the decay mode D0 to K+K- [Γ(D0)-Γ(D0bar)]/[Γ(D0)+Γ(D0bar)]
2017 LHCb R. Aaij et al. (LHCb Collab.), Phys. Lett.B 767 177 (2017). +0.0004 ± 0.0012 ± 0.0010
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
2008 BELLE M. Staric et al. (BELLE Collab.), Phys. Lett.B 670, 190 (2008). -0.0043 ± 0.0030 ± 0.0011
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
HFLAV average -0.0009 ± 0.0011

Year Experiment CP Asymmetry in the decay mode D0 to π+π-π0 [Γ(D0)-Γ(D0bar)]/[Γ(D0)+Γ(D0bar)]
2015 LHCb R. Aaij et al. (LHCb Collab.), Phys. Lett. B 740, 158 (2015). Model independent technique, no evidence for CP violation
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
HFLAV 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 G. Bonvicini et al. (CLEO Collab.), Phys. Rev. D 89, 072002 (2014). +0.001 ± 0.003 ± 0.004

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)
HFLAV 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)
HFLAV average -0.0008 ± 0.0077

Year Experiment CP Asymmetry in the decay mode D0 to K0sK-π+ [Γ(D0)-Γ(D0bar)]/[Γ(D0)+Γ(D0bar)]
2016 LHCb R. Aaij et al. (LHCb Collab.), Phys. Rev. D 93, 052018 (2016). Amplitude analysis, no evidence for CP violation

Year Experiment CP Asymmetry in the decay mode D0 to K0sK+π- [Γ(D0)-Γ(D0bar)]/[Γ(D0)+Γ(D0bar)]
2016 LHCb R. Aaij et al. (LHCb Collab.), Phys. Rev. D 93, 052018 (2016). Amplitude analysis, no evidence for CP violation

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). Model independent technique, 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)]
2014 CLEO G. Bonvicini et al. (CLEO Collab.), Phys. Rev. D 89, 072002 (2014). +0.002 ± 0.003 ± 0.004

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)]
2019 BELLE J. B. Kim et al. (BELLE Collab.), Phys. Rev. D 99, 011104 (2019). +0.0034 ± 0.0036 ± 0.0006
2019 LHCb R. Aaij et al. (LHCb Collab.), JHEP 02, 126 (2019). Amplitude analysis, no evidence for CP violation
2013 LHCb R. Aaij et al. (LHCb Collab.), Phys. Lett. B 726, 623 (2013). Model independent technique, no evidence for CP violation
2012 CLEO M. Artuso et al. (CLEO Collab.), Phys. Rev. D 85, 122002 (2012). 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
HFLAV average +0.0032 ± 0.0036

Year Experiment CP Asymmetry in the decay mode D0 to K*0(->K-π+)γ [Γ(D0)-Γ(D0bar)]/[Γ(D0)+Γ(D0bar)]
2017 BELLE T. Nanut et al. (BELLE Collab.), Phys. Rev. Lett. 118, 051801 (2017). -0.003 ± 0.020 ± 0.000

Year Experiment CP Asymmetry in the decay mode D0 to φ(->K+K-)γ [Γ(D0)-Γ(D0bar)]/[Γ(D0)+Γ(D0bar)]
2017 BELLE T. Nanut et al. (BELLE Collab.), Phys. Rev. Lett. 118, 051801 (2017). -0.094 ± 0.066 ± 0.001

Year Experiment CP Asymmetry in the decay mode D0 to ρ0(->π+π-)γ [Γ(D0)-Γ(D0bar)]/[Γ(D0)+Γ(D0bar)]
2017 BELLE T. Nanut et al. (BELLE Collab.), Phys. Rev. Lett. 118, 051801 (2017). +0.056 ± 0.152 ± 0.006

Year Experiment CP Asymmetry in the decay mode D0 to K+K-μ+μ- [Γ(D0)-Γ(D0bar)]/[Γ(D0)+Γ(D0bar)]
2018 LHCb R. Aaij et al. (LHCb Collab.), Phys. Rev. Lett. 121, 091801 (2018). +0.00 ± 0.11 ± 0.02

Year Experiment CP Asymmetry in the decay mode D0 to π+π-μ+μ- [Γ(D0)-Γ(D0bar)]/[Γ(D0)+Γ(D0bar)]
2018 LHCb R. Aaij et al. (LHCb Collab.), Phys. Rev. Lett. 121, 091801 (2018). +0.049 ± 0.038 ± 0.007


CP Asymmetries in D+ decays

Year Experiment CP Asymmetry in the decay mode D+ to μ+ν [Γ(D+)-Γ(D-)]/[Γ(D+)+Γ(D-)]
2008 CLEO 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 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 H. Mendez et al. (CLEO Collab.), Phys. Rev. D 81, 052013 (2010). -0.020 ± 0.023 ± 0.003
HFLAV 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-)]
2017 LHCb R. Aaij et al. (LHCb Collab.), Phys. Lett. B 771, 21 (2017). -0.0061 ± 0.0072 ± 0.0053 ± 0.0012
2011 BELLE E. Won et al. (BELLE Collab.), Phys. Rev. Lett. 107, 221801 (2011). -0.0012 ± 0.0112 ± 0.0017
2010 CLEO H. Mendez et al. (CLEO Collab.), Phys. Rev. D 81, 052013 (2010). -0.040 ± 0.034 ± 0.003
HFLAV average -0.006 ± 0.007

Year Experiment CP Asymmetry in the decay mode D+ to K+π0 [Γ(D+)-Γ(D-)]/[Γ(D+)+Γ(D-)]
2010 CLEO 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 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
HFLAV average -0.0041 ± 0.0009

Year Experiment CP Asymmetry in the decay mode D+ to K0sK+ [Γ(D+)-Γ(D-)]/[Γ(D+)+Γ(D-)]
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 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
HFLAV average -0.0011 ± 0.0025

Year Experiment CP Asymmetry in the decay mode D+ to ( K0/K0) K+
(subtraction of the effects due to the K0-K0 system) 		[Γ(D+)-Γ(D-)]/[Γ(D+)+Γ(D-)]
2014 LHCb R. Aaij et al. (LHCb Collab.), JHEP 1410, 025 (2014). +0.0003 ± 0.0017 ± 0.0014
2013 BABAR J.P. Lees et al. (BABAR Collab.), Phys. Rev. D 87, 052012 (2013). +0.0046 ± 0.0036 ± 0.0025
2013 BELLE B.R. Ko et al. (BELLE Collab.), JHEP 02, 098 (2013). +0.0008 ± 0.0028 ± 0.0014
HFLAV average +0.0011 ± 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). Model independent technique, 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 D0 V.M. Abazov et al. (D0 Collab.), Phys. Rev. D 90, 111102 (2014). -0.0016 ± 0.0015 ± 0.0009
2014 CLEO G. Bonvicini et al. (CLEO Collab.), Phys. Rev. D 89, 072002 (2014). -0.003 ± 0.002 ± 0.004
HFLAV average -0.0018 ± 0.0016

Year Experiment CP Asymmetry in the decay mode D+ to K0sπ+π0 [Γ(D+)-Γ(D-)]/[Γ(D+)+Γ(D-)]
2014 CLEO 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 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 P. Rubin et al. (CLEO 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
HFLAV 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 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 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+ decays

Year Experiment CP Asymmetry in the decay mode Ds+ to μ+ν [Γ(Ds+)-Γ(Ds-)]/[Γ(Ds+)+Γ(Ds-)]
2009 CLEO 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 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-)]
2017 LHCb R. Aaij et al. (LHCb Collab.), Phys. Lett. B 771, 21 (2017). -0.0082 ± 0.0036 ± 0.0022 ± 0.002
2013 CLEO P.U.E. Onyisi et al. (CLEO Collab.), Phys. Rev. D 88, 032009 (2013). -0.022 ± 0.022 ± 0.006
HFLAV average +0.0008 ± 0.0026

Year Experiment CP Asymmetry in the decay mode Ds+ to K0sπ+ [Γ(Ds+)-Γ(Ds-)]/[Γ(Ds+)+Γ(Ds-)]
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 H. Mendez et al. (CLEO Collab.), Phys. Rev. D 81, 052013 (2010). +0.163 ± 0.073 ± 0.003
HFLAV average +0.0311 ± 0.0154

Year Experiment CP Asymmetry in the decay mode Ds+ to ( K0/K0) π+
(subtraction of the effects due to the K0-K0 system) 		[Γ(Ds+)-Γ(Ds-)]/[Γ(Ds+)+Γ(Ds-)]
2014 LHCb R. Aaij et al. (LHCb Collab.), JHEP 1410, 025 (2014). +0.0038 ± 0.0046 ± 0.0017
2013 BABAR J.P. Lees et al. (BABAR Collab.), Phys. Rev. D 87, 052012 (2013). +0.003 ± 0.020 ± 0.003
HFLAV average +0.0038 ± 0.0048

Year Experiment CP Asymmetry in the decay mode Ds+ to K0sK+ [Γ(Ds+)-Γ(Ds-)]/[Γ(Ds+)+Γ(Ds-)]
2013 CLEO 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
HFLAV 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 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 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 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 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 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 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 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 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 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 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 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 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 P.U.E. Onyisi et al. (CLEO Collab.), Phys. Rev. D 88, 032009 (2013). +0.000 ± 0.027 ± 0.012



CP Asymmetries in Λc decays

For charm baryons CP asymmetry has been accessed through comparison of P asymmetry in decays of Λc+ and Λc-, measured with the weak-asymmetry parameters, respectively α(Λc+) and α(Λc-). As under P-parity conservation:
α(Λc+) = -α(Λc-),
the CP-violating asymmetry is defined as:
AαCP = [α(Λc+) + α(Λc-)] /[α(Λc+) - α(Λc-].

The α(Λc) can be measured through an angular analysis exploiting a helicity angle of weakly-decaying baryon in Λc decay chain, for instance Λ->pπ in Λc+->Λπ+ decays.

Year Experiment CP Asymmetry in the decay mode Λc+ to Λ e+ ν [α(Λc+)+α(Λc-)]/[α(Λc+)-α(Λc-]
2005 CLEO J.W. Hinson et al. (CLEO Collab.), Phys. Rev. Lett. 94, 191801 (2005). 0.00 ± 0.03 ± 0.01 ± 0.02

Year Experiment CP Asymmetry in the decay mode Λc+ to Λπ+ [α(Λc+)+α(Λc-)]/[α(Λc+)-α(Λc-]
2006 FOCUS J.M. Link et al. (FOCUS Collab.), Phys. Lett. B 34, 165 (2006). -0.07 ± 0.19 ± 0.12

 

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