A study of CP violation in the decays B2DhD2KKpipi and B2DhD2pipipipi

The first study of CP violation in the decay mode B± → [KKππ]Dh, with h = K,π, is presented, exploiting a data sample of proton-proton collisions collected by the LHCb experiment that corresponds to an integrated luminosity of 9 fb−1. The analysis is performed in bins of phase space, which are optimised for sensitivity to local CP asymmetries. CP -violating observables that are sensitive to the angle γ of the Unitarity Triangle are determined. The analysis requires external information on charm-decay parameters, which are currently taken from an amplitude analysis of LHCb data, but can be updated in the future when direct measurements become available. Measurements are also performed of phase-space integrated observables for B± → [KKππ]Dh and B± → [ππππ]Dh decays. Published in Eur. Phys. J. C83 547 (2023) © 2023 CERN for the benefit of the LHCb collaboration. CC BY 4.0 licence. †Authors are listed at the end of this paper. ar X iv :2 30 1. 10 32 8v 2 [ he pex ] 3 1 Ju l 2 02 3

[1]  I. A. Monroy,et al.  Measurement of the CKM angle γ with B±→ D[K∓π±π±π∓]h± decays using a binned phase-space approach , 2023, Journal of High Energy Physics.

[2]  Y. F. Wang,et al.  Measurement of the $C\!P$-even fraction of $D^{0}\to\pi^{+}\pi^{-}\pi^{+}\pi^{-}$ , 2022, 2208.10098.

[3]  L. A. Granado Cardoso,et al.  Constraints on the CKM angle γ from B±→ Dh± decays using D → h±h′∓π0 final states , 2022, Journal of High Energy Physics.

[4]  A. B. Kaliyar,et al.  Combined analysis of Belle and Belle II data to determine the CKM angle ϕ3 using B+ → D($$ {K}_S^0 $$h+h−)h+ decays , 2021, Journal of High Energy Physics.

[5]  R. A. Mohammed,et al.  Simultaneous determination of CKM angle γ and charm mixing parameters , 2021, Journal of High Energy Physics.

[6]  Wei-Yin Loh,et al.  Classification and regression trees , 2011, WIREs Data Mining Knowl. Discov..

[7]  Li-Yu Daisy Liu,et al.  Future Physics Programme of BESIII , 2019, Chinese Physics C.

[8]  T. Kuhr,et al.  Averages of b-hadron, c-hadron, and $$\tau $$-lepton properties as of 2018 , 2019, The European Physical Journal C.

[9]  M. Dorigo,et al.  Search for CP violation through an amplitude analysis of D0 → K+K−π+π− decays , 2018, Journal of High Energy Physics.

[10]  D. Müller,et al.  ReDecay: a novel approach to speed up the simulation at LHCb , 2018, The European Physical Journal C.

[11]  I. A. Monroy,et al.  Measurement of the CKM angle using B-+/- DK +/- with D -> KS0(+-),(KsK+K-)-K-0 decays (vol 08, 176, 2018) , 2018 .

[12]  I. A. Monroy,et al.  Measurement of CP observables in B ± → D ( ∗ ) K ± and B ± → D ( ∗ ) π ± decays , 2017 .

[13]  I. A. Monroy,et al.  Measurement of the B± production asymmetry and the CP asymmetry in B± →j /ψK± decays MEASUREMENT of the B± PRODUCTION ASYMMETRY ... R. AAIJ et al. , 2017 .

[14]  M. Dorigo,et al.  Measurement of CP observables in B±→DK± and B±→Dπ± with two- and four-body D decays , 2016 .

[15]  J. Rademacker,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−π0 and D→K+K−π0 , 2015, 1504.05878.

[16]  M. Dorigo,et al.  LHCb detector performance , 2014, 1412.6352.

[17]  J. Zupan,et al.  The ultimate theoretical error on γ from B → DK decays , 2013, 1308.5663.

[18]  S. Miglioranzi,et al.  The LHCb Simulation Application, Gauss: Design, Evolution and Experience , 2011 .

[19]  N. Davidson,et al.  PHOTOS interface in C++: Technical and physics documentation , 2010, Comput. Phys. Commun..

[20]  P. Harrison,et al.  Handling of the generation of primary events in Gauss, the LHCb simulation framework , 2010, IEEE Nuclear Science Symposuim & Medical Imaging Conference.

[21]  D. Leith,et al.  Evidence for direct CP violation in the measurement of the Cabbibo-Kobayashi-Maskawa angle γ with B∓ → D(*)K(*)∓ decays. , 2010, Physical review letters.

[22]  F. Tegenfeldt,et al.  TMVA , the Toolkit for Multivariate Data Analysis with ROOT , 2008 .

[23]  Chris P. Barnes,et al.  The LHCb detector at the LHC , 2008 .

[24]  A. Bondar,et al.  The use of quantum-correlated D0 decays for φ3 measurement , 2008, 0801.0840.

[25]  Peter Skands,et al.  A brief introduction to PYTHIA 8.1 , 2007, Comput. Phys. Commun..

[26]  M. Wolter,et al.  TMVA - Toolkit for Multivariate Data Analysis with ROOT : Users guide , 2007 .

[27]  M. Wolter,et al.  TMVA - Toolkit for Multivariate Data Analysis , 2007, physics/0703039.

[28]  J. Rademacker,et al.  Determining the unitarity triangle angle γ with a four-body amplitude analysis of B± → (K+K-π+π-)DK± decays , 2006, hep-ph/0611272.

[29]  S. Incerti,et al.  Geant4 developments and applications , 2006, IEEE Transactions on Nuclear Science.

[30]  A. Bondar,et al.  Feasibility study of model-independent approach to φ3 measurement using Dalitz plot analysis , 2005, hep-ph/0510246.

[31]  D. Lange,et al.  The EvtGen particle decay simulation package , 2001 .

[32]  Yoav Freund,et al.  A decision-theoretic generalization of on-line learning and an application to boosting , 1997, EuroCOLT.

[33]  Alan D. Martin,et al.  Review of Particle Physics , 2000, Physical Review D.

[34]  Makoto Kobayashi,et al.  CP Violation in the Renormalizable Theory of Weak Interaction , 1973 .

[35]  N. Cabibbo.  Unitary Symmetry and Leptonic Decays , 1963 .

[36]  Zhengtao Li,et al.  Measurement of CP observables in B + /-- > DK + /-and B + /-- > D pi + /-with two-and four-body D decays , 2016 .