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Aaij, R, Beteta, C Abellan, Ackernley, T, Adeva, B, Adinolfi, M, Afsharnia, H, Aidala, CA, Aiola, S, Ajaltouni, Z, Akar, S et al (show 945 more authors) , Albrecht, J, Alessio, F, Alexander, M, Alfonso Albero, A, Aliouche, Z, Alkhazov, G, Cartelle, P Alvarez, Amato, S, Amhis, Y, An, L, Anderlini, L, Andreianov, A, Andreotti, M, Archilli, F, Artamonov, A, Artuso, M, Arzymatov, K, Aslanides, E, Atzeni, M, Audurier, B, Bachmann, S, Bachmayer, M, Back, JJ, Baladron Rodriguez, P, Balagura, V, Baldini, W, Leite, J Baptista, Barlow, RJ, Barsuk, S, Barter, W, Bartolini, M, Baryshnikov, F, Basels, JM, Bassi, G, Batsukh, B, Battig, A, Bay, A, Becker, M, Bedeschi, F, Bediaga, I, Beiter, A, Belavin, V, Belin, S, Bellee, V, Belous, K, Belov, I, Belyaev, I, Bencivenni, G, Ben-Haim, E, Berezhnoy, A, Bernet, R, Berninghoff, D, Bernstein, HC, Bertella, C, Bertolin, A, Betancourt, C, Betti, F, Bezshyiko, Ia, Bhasin, S, Bhom, J, Bian, L, Bieker, MS, Bifani, S, Billoir, P, Birch, M, Bishop, FCR, Bitadze, 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Hushchyn, M, Hutchcroft, D ORCID: 0000-0002-4174-6509, Hynds, D, Ibis, P, Idzik, M, Ilin, D, Ilten, P, Inglessi, A, Ishteev, A, Ivshin, K, Jacobsson, R, Jakobsen, S, Jans, E, Jashal, BK, Jawahery, A, Jevtic, V, Jezabek, M, Jiang, F, John, M, Johnson, D, Jones, CR, Jones, TP, Jost, B, Jurik, N, Kandybei, S, Kang, Y, Karacson, M, Karpov, M, Keizer, F, Kenzie, M, Ketel, T, Khanji, B, Kharisova, A, Kholodenko, S, Kirn, T, Kirsebom, VS, Kitouni, O, Klaver, S, Klimaszewski, K, Koliiev, S, Kondybayeva, A, Konoplyannikov, A, Kopciewicz, P, Kopecna, R, Koppenburg, P, Korolev, M, Kostiuk, I, Kot, O, Kotriakhova, S, Kravchenko, P, Kravchuk, L, Krawczyk, RD, Kreps, M, Kress, F, Kretzschmar, S, Krokovny, P, Krupa, W, Krzemien, W, Kucewicz, W, Kucharczyk, M, Kudryavtsev, V, Kuindersma, HS, Kunde, GJ, Kvaratskheliya, T, Lacarrere, D, Lafferty, G, Lai, A, Lampis, A, Lancierini, D, Lane, JJ, Lane, R, Lanfranchi, G, Langenbruch, C, Langer, J, Lantwin, O, Latham, T, Lazzari, F, Le Gac, R, Lee, SH, 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(2021)
Search for <i>CP</i> violation in <i>D</i><sub>(<i>s</i>)</sub><SUP>+</SUP> → <i>h</i><SUP>+</SUP> π<SUP>0</SUP> and decays <i>D</i><sub>(<i>s</i>)</sub><SUP>+</SUP> → <i>h</i><SUP>+</SUP> η decays.
JOURNAL OF HIGH ENERGY PHYSICS, 06 (6).
019-.
Abstract
Searches for $CP$ violation in the two-body decays $D_{(s)}^{+}\rightarrow
h^{+}\pi^{0}$ and $D_{(s)}^{+} \rightarrow h^{+}\eta$ (where $h^{+}$ denotes a
$\pi^{+}$ or $K^{+}$ meson) are performed using $pp$ collision data collected
by the LHCb experiment corresponding to either 9 fb$^{-1}$ or 6 fb$^{-1}$ of
integrated luminosity. The $\pi^{0}$ and $\eta$ mesons are reconstructed using
the $e^{+}e^{-}\gamma$ final state, which can proceed as three-body decays
$\pi^{0}\rightarrow e^{+}e^{-}\gamma$ and $\eta \rightarrow e^{+}e^{-}\gamma$,
or via the two-body decays $\pi^{0}\rightarrow \gamma\gamma$ and
$\eta\rightarrow\gamma\gamma$ followed by a photon conversion. The measurements
are made relative to the control modes $D_{(s)}^{+}\rightarrow K_{S}^{0} h^{+}$
to cancel the production and detection asymmetries. The $CP$ asymmetries are
measured to be \begin{align} \mathcal{A}_{CP}(D^{+}\rightarrow \pi^{+}\pi^{0})
&= (-1.3 \pm 0.9 \pm 0.6 )\%, \end{align} \begin{align}
\mathcal{A}_{CP}(D^{+}\rightarrow K^{+}\pi^{0}) &= (-3.2 \pm 4.7 \pm 2.1 )\%,
\end{align} \begin{align} \mathcal{A}_{CP}(D^{+}\rightarrow \pi^{+}\eta) &=
(-0.2 \pm 0.8 \pm 0.4 )\%, \end{align} \begin{align}
\mathcal{A}_{CP}(D^{+}\rightarrow K^{+}\eta) &= (-6 \pm 10 \pm 4 )\%,
\end{align} \begin{align} \mathcal{A}_{CP}(D_{s}^{+}\rightarrow K^{+}\pi^{0})
&= (-0.8 \pm 3.9 \pm 1.2 )\%, \end{align} \begin{align}
\mathcal{A}_{CP}(D_{s}^{+}\rightarrow \pi^{+}\eta) &= (0.8 \pm 0.7 \pm 0.5 )\%,
\end{align} \begin{align} \mathcal{A}_{CP}(D_{s}^{+}\rightarrow K^{+}\eta) &=
(0.9 \pm 3.7 \pm 1.1 )\%, \end{align} where the first uncertainties are
statistical and the second systematic. These results are consistent with no
$CP$ violation and mostly constitute the most precise measurements of
$\mathcal{A}_{CP}$ in these decay modes to date.
Item Type: |
Article
|
Additional Information: |
All figures and tables, along with any supplementary material and
additional information, are available at
https://cern.ch/lhcbproject/Publications/p/LHCb-PAPER-2021-001.html (LHCb
public pages) |
Uncontrolled Keywords: |
Charm physics, CP violation, Hadron-Hadron scattering (experiments) |
Divisions: |
Faculty of Science and Engineering > School of Physical Sciences |
Depositing User: |
Symplectic Admin
|
Date Deposited: |
02 Sep 2021 09:05 |
Last Modified: |
14 Mar 2024 23:01 |
DOI: |
10.1007/JHEP06(2021)019 |
Related URLs: |
|
URI: |
https://livrepository.liverpool.ac.uk/id/eprint/3134981 |