Search for CP violation through an amplitude analysis of D                          
                        0
                                                  → K                          
                        +
                                                  K                          
                        −
                                                  π                          
                        +
                                                  π                          
                        −
                                                  decays

The Lhcb Collaboration

doi:10.1007/JHEP02(2019)126

Search for CP violation through an amplitude analysis of D ⁰ → K ⁺ K ⁻ π ⁺ π ⁻ decays

The Lhcb Collaboration

Department of Physics

Research output: Contribution to journal › Article

Abstract

A search for CP violation in the Cabibbo-suppressed D ⁰ → K ⁺ K ⁻ π ⁺ π ⁻ decay mode is performed using an amplitude analysis. The measurement uses a sample of pp collisions recorded by the LHCb experiment during 2011 and 2012, corresponding to an integrated luminosity of 3.0 fb ⁻¹ . The D ⁰ mesons are reconstructed from semileptonic b-hadron decays into D ⁰ μ ⁻ X final states. The selected sample contains more than 160 000 signal decays, allowing the most precise amplitude modelling of this D ⁰ decay to date. The obtained amplitude model is used to perform the search for CP violation. The result is compatible with CP symmetry, with a sensitivity ranging from 1% to 15% depending on the amplitude considered.[Figure not available: see fulltext.]

Original language	English (US)
Article number	126
Journal	Journal of High Energy Physics
Volume	2019
Issue number	2
DOIs	https://doi.org/10.1007/JHEP02(2019)126
State	Published - Feb 1 2019

Fingerprint

CP violation

decay

mesons

luminosity

collisions

sensitivity

symmetry

Keywords

Charm physics
CP violation
Flavor physics
Hadron-Hadron scattering (experiments)

ASJC Scopus subject areas

Nuclear and High Energy Physics

Cite this

The Lhcb Collaboration (2019). Search for CP violation through an amplitude analysis of D ⁰ → K ⁺ K ⁻ π ⁺ π ⁻ decays Journal of High Energy Physics, 2019(2), [126]. https://doi.org/10.1007/JHEP02(2019)126

Search for CP violation through an amplitude analysis of D ⁰ → K ⁺ K ⁻ π ⁺ π ⁻ decays . / The Lhcb Collaboration.

In: Journal of High Energy Physics, Vol. 2019, No. 2, 126, 01.02.2019.

Research output: Contribution to journal › Article

The Lhcb Collaboration 2019, ' Search for CP violation through an amplitude analysis of D ⁰ → K ⁺ K ⁻ π ⁺ π ⁻ decays ', Journal of High Energy Physics, vol. 2019, no. 2, 126. https://doi.org/10.1007/JHEP02(2019)126

The Lhcb Collaboration. Search for CP violation through an amplitude analysis of D ⁰ → K ⁺ K ⁻ π ⁺ π ⁻ decays Journal of High Energy Physics. 2019 Feb 1;2019(2). 126. https://doi.org/10.1007/JHEP02(2019)126

The Lhcb Collaboration. / Search for CP violation through an amplitude analysis of D ⁰ → K ⁺ K ⁻ π ⁺ π ⁻ decays In: Journal of High Energy Physics. 2019 ; Vol. 2019, No. 2.

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abstract = "A search for CP violation in the Cabibbo-suppressed D 0 → K + K − π + π − decay mode is performed using an amplitude analysis. The measurement uses a sample of pp collisions recorded by the LHCb experiment during 2011 and 2012, corresponding to an integrated luminosity of 3.0 fb −1 . The D 0 mesons are reconstructed from semileptonic b-hadron decays into D 0 μ − X final states. The selected sample contains more than 160 000 signal decays, allowing the most precise amplitude modelling of this D 0 decay to date. The obtained amplitude model is used to perform the search for CP violation. The result is compatible with CP symmetry, with a sensitivity ranging from 1{\%} to 15{\%} depending on the amplitude considered.[Figure not available: see fulltext.]",

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AU - Alfonso Albero, A.

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AU - Alves, A. A.

AU - Amato, S.

AU - Amerio, S.

AU - Amhis, Y.

AU - An, L.

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AU - Andrews, J. E.

AU - Archilli, F.

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AU - Artamonov, A.

AU - Artuso, Marina

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AU - Baranov, A.

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AU - Barrand, G. C.

AU - Barsuk, S.

AU - Barter, W.

AU - Bartolini, M.

AU - Baryshnikov, F.

AU - Batozskaya, V.

AU - Batsukh, B.

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AB - A search for CP violation in the Cabibbo-suppressed D 0 → K + K − π + π − decay mode is performed using an amplitude analysis. The measurement uses a sample of pp collisions recorded by the LHCb experiment during 2011 and 2012, corresponding to an integrated luminosity of 3.0 fb −1 . The D 0 mesons are reconstructed from semileptonic b-hadron decays into D 0 μ − X final states. The selected sample contains more than 160 000 signal decays, allowing the most precise amplitude modelling of this D 0 decay to date. The obtained amplitude model is used to perform the search for CP violation. The result is compatible with CP symmetry, with a sensitivity ranging from 1% to 15% depending on the amplitude considered.[Figure not available: see fulltext.]

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KW - CP violation

KW - Flavor physics

KW - Hadron-Hadron scattering (experiments)

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Access to Document

10.1007/JHEP02(2019)126