Measurement of $CP$ asymmetries in $D^{\pm}\rightarrow η^{\prime} π^{\pm}$ and $D_s^{\pm}\rightarrow η^{\prime} π^{\pm}$ decays
Creators: name: LHCb Collaboration
name: Aaij, R.
name: Adeva, B.
name: Adinolfi, M.
name: Ajaltouni, Z.
name: Akar, S.
name: Albrecht, J.
name: Alessio, F.
name: Alexander, M.
name: Ali, S.
name: Alkhazov, G.
name: Cartelle, P. Alvarez
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name: Amato, S.
name: Amerio, S.
name: Amhis, Y.
name: An, L.
name: Anderlini, L.
name: Andreassi, G.
name: Andreotti, M.
name: Andrews, J. E.
name: Appleby, R. B.
name: Archilli, F.
name: d'Argent, P.
name: Romeu, J. Arnau
name: Artamonov, A.
name: Artuso, M.
name: Aslanides, E.
name: Auriemma, G.
name: Baalouch, M.
name: Babuschkin, I.
name: Bachmann, S.
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name: Badalov, A.
name: Baesso, C.
name: Baker, S.
name: Baldini, W.
name: Barlow, R. J.
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name: Barter, W.
name: Baszczyk, M.
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name: Batsukh, B.
name: Battista, V.
name: Bay, A.
name: Beaucourt, L.
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name: Bedeschi, F.
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name: Belloli, N.
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name: Bencivenni, G.
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name: Bernet, R.
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name: Betti, F.
name: Bettler, M. -O.
name: van Beuzekom, M.
name: Bezshyiko, Ia.
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name: Billoir, P.
name: Bird, T.
name: Birnkraut, A.
name: Bitadze, A.
name: Bizzeti, A.
name: Blake, T.
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name: Blouw, J.
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name: Bocci, V.
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name: Bondar, N.
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name: Bozzi, C.
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name: Brodzicka, J.
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name: Xie, Y.
name: Xing, Z.
name: Xu, Z.
name: Yang, Z.
name: Yao, Y.
name: Yin, H.
name: Yu, J.
name: Yuan, X.
name: Yushchenko, O.
name: Zarebski, K. A.
name: Zavertyaev, M.
name: Zhang, L.
name: Zhang, Y.
name: Zhang, Y.
name: Zhelezov, A.
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Publisher: name: arXiv
Year: 2017
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: A search for $CP$ violation in $D^{\pm}\rightarrow η^{\prime} π^{\pm}$ and $D^{\pm}_{s}\rightarrow η^{\prime} π^{\pm}$ decays is performed using proton-proton collision data, corresponding to an integrated luminosity of $3$ fb$^{-1}$, recorded by the LHCb experiment at centre-of-mass energies of $7$ and $8$ TeV. The measured $CP$-violating charge asymmetries are $A_{CP}(D^{\pm} \rightarrow η^{\prime} π^{\pm})=(-0.61\pm 0.72 \pm 0.53 \pm 0.12)\%$ and $A_{CP}(D^{\pm}_{s}\rightarrow η^{\prime} π^{\pm})=(-0.82\pm 0.36 \pm 0.22 \pm 0.27)\%$, where the first uncertainties are statistical, the second systematic, and the third are the uncertainties on the $A_{CP}(D^{\pm} \rightarrow K^0_S π^{\pm})$ and $A_{CP}(D^{\pm}_{s}\rightarrow ϕπ^{\pm})$ measurements used for calibration. The results represent the most precise measurements of these asymmetries to date.
description: All figures and tables, along with any supplementary material and additional information, are available at https://lhcbproject.web.cern.ch/lhcbproject/Publications/LHCbProjectPublic/LHCb-PAPER-2016-041.html