Search for Time-Dependent <math display="inline"><mi>C</mi><mi>P</mi></math> Violation in <math display="inline"><mrow><msup><mrow><mi>D</mi></mrow><mrow><mn>0</mn></mrow></msup><mo stretchy="false">→</mo><msup><mrow><mi>π</mi></mrow><mrow><mo>+</mo></mrow></msup><msup><mrow><mi>π</mi></mrow><mrow><mo>-</mo></mrow></msup><msup><mrow><mi>π</mi></mrow><mrow><mn>0</mn></mrow></msup></mrow></math> Decays

Aaij, Roel; Abdelmotteleb, Ahmed Sameh Wagih; Abellan Beteta, Carlos; Abudinén, Fernando Jesus; Ackernley, Thomas; Adefisoye, A.A.; Adefisoye, Ayomide Matthew; Adeva, Bernardo; Adinolfi, Marco; Adlarson, Patrik Harri

doi:10.1103/PhysRevLett.133.101803

Search for Time-Dependent $C P$ Violation in $D^{0} \to π^{+} π^{-} π^{0}$ Decays

LHCb

Collaboration

May 10, 2024

12 pages

Published in:

Phys.Rev.Lett. 133 (2024) 10, 101803

Published: Sep 5, 2024

e-Print:

2405.06556 [hep-ex]

DOI:

10.1103/PhysRevLett.133.101803 (publication)

Report number:

LHCb-PAPER-2024-003,
CERN-EP-2024-111

Experiments:

CERN-LHC-LHCb

View in:

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Citations per year

Abstract: (APS)

A measurement of time-dependent

C P

violation in

D^{0} \to π^{+} π^{-} π^{0}

decays using a

p p

collision data sample collected by the LHCb experiment in 2012 and from 2015 to 2018, corresponding to an integrated luminosity of

7.7 {fb}^{- 1}

, is presented. The initial flavor of each

D^{0}

candidate is determined from the charge of the pion produced in the

D^{*} (2010)^{+} \to D^{0} π^{+}

decay. The decay

D^{0} \to K^{-} π^{+} π^{0}

is used as a control channel to validate the measurement procedure. The gradient of the time-dependent

C P

asymmetry

Δ Y

in

D^{0} \to π^{+} π^{-} π^{0}

decays is measured to be

Δ Y = (- 1.3 \pm 6.3 \pm 2.4) \times 10^{- 4},

where the first uncertainty is statistical and the second is systematic, which is compatible with

C P

conservation.

Note:

All figures and tables, along with machine-readable versions and any supplementary material and additional information, are available at https://lbfence.cern.ch/alcm/public/analysis/full-details/1787

p p: scattering
p p: colliding beams
D0: hadronic decay
D*(2010): hadronic decay
pi: charge
time dependence
LHC-B
CERN LHC Coll
CP: violation
asymmetry: CP

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Figures(6)

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