Search for CP violation in the phase space of D0→π−π+π0 decays with the energy test

LHCb Collaboration; Simone Bifani; Ryan Calladine; Naomi Cooke; Cristina Lazzeroni; Jonathan Plews; Niladribihari Sahoo; Mark Slater; Paul Swallow; D. J. D. Thompson; Nigel Watson

doi:10.1007/JHEP09(2023)129

Search for CP violation in the phase space of D0→π−π+π0 decays with the energy test

LHCb Collaboration, Simone Bifani, Ryan Calladine, Naomi Cooke, Cristina Lazzeroni, Jonathan Plews, Niladribihari Sahoo, Mark Slater, Paul Swallow, D. J. D. Thompson, Nigel Watson

Physics and Astronomy

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Abstract

A search for CP violation in D0→π−π+π0 decays is reported, using pp collision data collected by the LHCb experiment from 2015 to 2018 corresponding to an integrated luminosity of 6fb−1. An unbinned model-independent approach provides sensitivity to local CP violation within the two-dimensional phase space of the decay. The method is validated using the Cabibbo-favoured channel $\D^0 \to \K^-\pi^+\pi^0$ and background regions of the signal mode. The results are consistent with CP symmetry in this decay.

Original language	English
Article number	129
Number of pages	24
Journal	JHEP
Volume	2023
DOIs	https://doi.org/10.1007/JHEP09(2023)129
Publication status	Published - 20 Sept 2023

Bibliographical note

We express our gratitude to our colleagues in the CERN accelerator departments for the
excellent performance of the LHC. We thank the technical and administrative staf at the
LHCb institutes. We acknowledge support from CERN and from the national agencies:
CAPES, CNPq, FAPERJ and FINEP (Brazil); MOST and NSFC (China); CNRS/IN2P3
(France); BMBF, DFG and MPG (Germany); INFN (Italy); NWO (Netherlands); MNiSW
and NCN (Poland); MEN/IFA (Romania); MICINN (Spain); SNSF and SER (Switzerland);
NASU (Ukraine); STFC (United Kingdom); DOE NP and NSF (U.S.A.). We acknowledge the computing resources that are provided by CERN, IN2P3 (France), KIT and
– 12 –
JHEP09(2023)129
DESY (Germany), INFN (Italy), SURF (Netherlands), PIC (Spain), GridPP (United Kingdom), CSCS (Switzerland), IFIN-HH (Romania), CBPF (Brazil), Polish WLCG (Poland)
and NERSC (U.S.A.). We are indebted to the communities behind the multiple opensource software packages on which we depend. Individual groups or members have received
support from ARC and ARDC (Australia); Minciencias (Colombia); AvH Foundation
(Germany); EPLANET, Marie Skłodowska-Curie Actions, ERC and NextGenerationEU
(European Union); A*MIDEX, ANR, IPhU and Labex P2IO, and Région Auvergne-RhôneAlpes (France); Key Research Program of Frontier Sciences of CAS, CAS PIFI, CAS CCEPP,
Fundamental Research Funds for the Central Universities, and Sci. & Tech. Program
of Guangzhou (China); GVA, XuntaGal, GENCAT, Inditex, InTalent and Prog. Atracción Talento, CM (Spain); SRC (Sweden); the Leverhulme Trust, the Royal Society and
UKRI (United Kingdom).

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Cite this

@article{19eb05d35a86465b9b04f85965226f38,

title = "Search for CP violation in the phase space of D0→π−π+π0 decays with the energy test",

abstract = "A search for CP violation in D0→π−π+π0 decays is reported, using pp collision data collected by the LHCb experiment from 2015 to 2018 corresponding to an integrated luminosity of 6fb−1. An unbinned model-independent approach provides sensitivity to local CP violation within the two-dimensional phase space of the decay. The method is validated using the Cabibbo-favoured channel $\D^0 \to \K^-\pi^+\pi^0$ and background regions of the signal mode. The results are consistent with CP symmetry in this decay.",

author = "{LHCb Collaboration} and Simone Bifani and Ryan Calladine and Naomi Cooke and Cristina Lazzeroni and Jonathan Plews and Niladribihari Sahoo and Mark Slater and Paul Swallow and Thompson, {D. J. D.} and Nigel Watson",

note = "We express our gratitude to our colleagues in the CERN accelerator departments for the excellent performance of the LHC. We thank the technical and administrative staf at the LHCb institutes. We acknowledge support from CERN and from the national agencies: CAPES, CNPq, FAPERJ and FINEP (Brazil); MOST and NSFC (China); CNRS/IN2P3 (France); BMBF, DFG and MPG (Germany); INFN (Italy); NWO (Netherlands); MNiSW and NCN (Poland); MEN/IFA (Romania); MICINN (Spain); SNSF and SER (Switzerland); NASU (Ukraine); STFC (United Kingdom); DOE NP and NSF (U.S.A.). We acknowledge the computing resources that are provided by CERN, IN2P3 (France), KIT and – 12 – JHEP09(2023)129 DESY (Germany), INFN (Italy), SURF (Netherlands), PIC (Spain), GridPP (United Kingdom), CSCS (Switzerland), IFIN-HH (Romania), CBPF (Brazil), Polish WLCG (Poland) and NERSC (U.S.A.). We are indebted to the communities behind the multiple opensource software packages on which we depend. Individual groups or members have received support from ARC and ARDC (Australia); Minciencias (Colombia); AvH Foundation (Germany); EPLANET, Marie Sk{\l}odowska-Curie Actions, ERC and NextGenerationEU (European Union); A*MIDEX, ANR, IPhU and Labex P2IO, and R{\'e}gion Auvergne-Rh{\^o}neAlpes (France); Key Research Program of Frontier Sciences of CAS, CAS PIFI, CAS CCEPP, Fundamental Research Funds for the Central Universities, and Sci. & Tech. Program of Guangzhou (China); GVA, XuntaGal, GENCAT, Inditex, InTalent and Prog. Atracci{\'o}n Talento, CM (Spain); SRC (Sweden); the Leverhulme Trust, the Royal Society and UKRI (United Kingdom). ",

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day = "20",

doi = "10.1007/JHEP09(2023)129",

language = "English",

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T1 - Search for CP violation in the phase space of D0→π−π+π0 decays with the energy test

AU - LHCb Collaboration

AU - Bifani, Simone

AU - Calladine, Ryan

AU - Cooke, Naomi

AU - Lazzeroni, Cristina

AU - Plews, Jonathan

AU - Sahoo, Niladribihari

AU - Slater, Mark

AU - Swallow, Paul

AU - Thompson, D. J. D.

AU - Watson, Nigel

N1 - We express our gratitude to our colleagues in the CERN accelerator departments for the excellent performance of the LHC. We thank the technical and administrative staf at the LHCb institutes. We acknowledge support from CERN and from the national agencies: CAPES, CNPq, FAPERJ and FINEP (Brazil); MOST and NSFC (China); CNRS/IN2P3 (France); BMBF, DFG and MPG (Germany); INFN (Italy); NWO (Netherlands); MNiSW and NCN (Poland); MEN/IFA (Romania); MICINN (Spain); SNSF and SER (Switzerland); NASU (Ukraine); STFC (United Kingdom); DOE NP and NSF (U.S.A.). We acknowledge the computing resources that are provided by CERN, IN2P3 (France), KIT and – 12 – JHEP09(2023)129 DESY (Germany), INFN (Italy), SURF (Netherlands), PIC (Spain), GridPP (United Kingdom), CSCS (Switzerland), IFIN-HH (Romania), CBPF (Brazil), Polish WLCG (Poland) and NERSC (U.S.A.). We are indebted to the communities behind the multiple opensource software packages on which we depend. Individual groups or members have received support from ARC and ARDC (Australia); Minciencias (Colombia); AvH Foundation (Germany); EPLANET, Marie Skłodowska-Curie Actions, ERC and NextGenerationEU (European Union); A*MIDEX, ANR, IPhU and Labex P2IO, and Région Auvergne-RhôneAlpes (France); Key Research Program of Frontier Sciences of CAS, CAS PIFI, CAS CCEPP, Fundamental Research Funds for the Central Universities, and Sci. & Tech. Program of Guangzhou (China); GVA, XuntaGal, GENCAT, Inditex, InTalent and Prog. Atracción Talento, CM (Spain); SRC (Sweden); the Leverhulme Trust, the Royal Society and UKRI (United Kingdom).

PY - 2023/9/20

Y1 - 2023/9/20

N2 - A search for CP violation in D0→π−π+π0 decays is reported, using pp collision data collected by the LHCb experiment from 2015 to 2018 corresponding to an integrated luminosity of 6fb−1. An unbinned model-independent approach provides sensitivity to local CP violation within the two-dimensional phase space of the decay. The method is validated using the Cabibbo-favoured channel $\D^0 \to \K^-\pi^+\pi^0$ and background regions of the signal mode. The results are consistent with CP symmetry in this decay.

AB - A search for CP violation in D0→π−π+π0 decays is reported, using pp collision data collected by the LHCb experiment from 2015 to 2018 corresponding to an integrated luminosity of 6fb−1. An unbinned model-independent approach provides sensitivity to local CP violation within the two-dimensional phase space of the decay. The method is validated using the Cabibbo-favoured channel $\D^0 \to \K^-\pi^+\pi^0$ and background regions of the signal mode. The results are consistent with CP symmetry in this decay.

U2 - 10.1007/JHEP09(2023)129

DO - 10.1007/JHEP09(2023)129

M3 - Article

SN - 1126-6708

VL - 2023

JO - JHEP

JF - JHEP

M1 - 129

ER -

Search for CP violation in the phase space of D0→π−π+π0 decays with the energy test

Abstract

Bibliographical note

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