Mixing and CP violation in charm decays at LHCb

Authors

  • Daniel Červenkov University of Oxford

DOI:

https://doi.org/10.31349/SuplRevMexFis.3.0308061

Keywords:

high-energy physics, charm physics, mixing, CP violation, LHCb

Abstract

We present an overview of four recent measurements of charm decays performed at the LHCb experiment. These include the first observation of the non-zero mass difference between neutral charm-meson eigenstates, the most precise measurements of ∆YKK and ∆Yππ, and timeintegrated ACP of eight two-body charm decays. The precision of the measurements is mainly limited by statistical uncertainty, so further improvement is expected with the upcoming LHC Run 3.

References

A. Lenz and G. Wilkinson. Mixing and CP Violation in the Charm System. Annu. Rev. Nucl. Part. Sci., 71(1):59–85, Sep 2021. doi:10.1146/annurev-nucl-102419-124613

(LHCb Collaboration) R. Aaij et al. Observation of CP Violation in Charm Decays. Phys. Rev. Lett., 122(21), May 2019. doi:10.1103/physrevlett.122.211803

(LHCb Collaboration) R. Aaij et al. Search for time-dependent CP violation in D0 → K + K − and D0 → π + π − decays. Physical Review D, 104(7), Oct 2021. doi:10.1103/physrevd.104.072010.

A. L. Kagan and L. Silvestrini. Dispersive and absorptive CP0 violation in D0 − D mixing. Phys. Rev. D, 103:053008, Mar 2021. doi:10.1103/PhysRevD.103.053008

H. Li, H. Umeeda, F. Xu, and F. Yu. D meson mixing as an inverse problem. Physics Letters B, 810:135802, 2020. doi:https://doi.org/10.1016/j.physletb.2020.135802

(LHCb Collaboration) R. Aaij et al. Measurement of the CP Violation Parameter AΓ in D0 → K + K − and D0 → π + π − Decays. Physical Review Letters, 118(26), Jun 2017. doi:10.1103/physrevlett.118.261803

(LHCb Collaboration) R. Aaij et al. Expression of Interest for a Phase-II LHCb Upgrade: Opportunities in flavour physics, and beyond, in the HL-LHC era. Technical report, CERN, Geneva, Feb 2017. URL: https://cds.cern.ch/record/2244311

(BABAR Collaboration) J. P. Lees et al. Measurement of D0 −D̄0 mixing and CP violation in two-body D0 decays. Phys. Rev. D, 87:012004, Jan 2013. doi:10.1103/PhysRevD.87.012004

(Belle Collaboration) M. Starič et al. Measurement of D0 − D̄0 mixing and search for CP violation in D0 → K + K − , π + π − decays with the full Belle data set. Physics Letters B, 753:412–418, 2016. doi:https://doi.org/10.1016/j.physletb.2015.12.025

(LHCb Collaboration) R. Aaij et al. Measurement of the charm-mixing parameter yCP. Phys. Rev. Lett., 122:011802, Jan 2019. doi:10.1103/PhysRevLett.122.011802

(LHCb Collaboration) R. Aaij et al. Measurement of the mass difference between neutral charm-meson eigenstates. Phys. Rev. Lett., 122:231802, Jun 2019. doi:10.1103/PhysRevLett.122.231802

(LHCb Collaboration) R. Aaij et al. Observation of the Mass Difference between Neutral Charm-Meson Eigenstates. Phys. Rev. Lett., 127(11), Sep 2021. doi:10.1103/physrevlett.127.111801

A. Di Canto, J. Garra Ticó, T. Gershon, N. Jurik, M. Martinelli, T. Pilař, S. Stahl, and D. Tonelli. Novel method for measuring charm-mixing parameters using multibody decays. Phys. Rev. D, 99:012007, Jan 2019. doi:10.1103/PhysRevD.99.012007

(CLEO Collaboration) J. Libby et al. Model-independent determination of the strong-phase difference between D0 and D̄0 → KS,L h+ h− (h = π, K) and its impact on the measurement of the CKM angle γ/φ3 . Phys. Rev. D, 82:112006, Dec 2010. doi:10.1103/PhysRevD.82.112006

(BESIII Collaboration) M. Ablikim et al. Model-independent determination of the relative strong-phase difference between D0 and D̄0 → KS,L π + π − and its impact on the measurement of the CKM angle γ/φ3 . Phys. Rev. D, 101:112002, Jun 2020. doi:10.1103/PhysRevD.101.112002.

H. Cheng and C. Chiang. Direct CP violation in two-body hadronic charmed meson decays. Phys. Rev. D, 85:034036, Feb 2012. doi:10.1103/PhysRevD.85.034036

U. Nierste and S. Schacht. CP violation in D0 → KS KS . Phys. Rev. D, 92:054036, Sep 2015. doi:10.1103/PhysRevD.92.054036

(LHCb Collaboration) R. Aaij et al. Measurement of CP asymmetry in D0 → KS0 KS0 decays. Physical Review D, 104(3), Aug 2021. doi:10.1103/physrevd.104.l031102

(LHCb Collaboration) R. Aaij et al. Measurement of the time-integrated CP asymmetry in D0 → KS0 KS0 decays. Journal of High Energy Physics, 2018(11), Nov 2018. doi:10.1007/jhep11(2018)048

(LHCb Collaboration) R. Aaij et al. Search for CP violation in D(s) → h+ η decays D(s) → h+ π0 and D(s). Journal of High Energy Physics, 2021(6), Jun 2021. doi:10.1007/jhep06(2021)019

(LHCb Collaboration) R. Aaij et al. Search for CP Violation in Ds+ → KS0 π + , D+ → KS0 K + , and D+ → φπ + Decays. Phys. Rev. Lett., 122:191803, May 2019. doi:10.1103/PhysRevLett.122.191803

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Published

2022-06-13

How to Cite

1.
Červenkov D. Mixing and CP violation in charm decays at LHCb. Supl. Rev. Mex. Fis. [Internet]. 2022 Jun. 13 [cited 2024 Mar. 29];3(3):0308061 1-7. Available from: https://rmf.smf.mx/ojs/index.php/rmf-s/article/view/6271