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Aaij, R, Adeva, B, Adinolfi, M, Ajaltouni, Z, Akar, S, Albrecht, J, Alessio, F, Alexander, M, Ali, S, Alkhazov, G et al (show 754 more authors) , Cartelle, P Alvarez, Alves, AA Jr, Amato, S, Amerio, S, Amhis, Y, An, L, Anderlini, L, Andreassi, G, Andreotti, M, Andrews, JE, Appleby, RB, Archilli, F, d'Argent, P, Romeu, J Arnau, Artamonov, A, Artuso, M, Aslanides, E, Auriemma, G, Baalouch, M, Babuschkin, I, Bachmann, S, Back, JJ, Badalov, A, Baesso, C, Baker, S, Baldini, W, Barlow, RJ, Barschel, C, Barsuk, S, Barter, W, Baszczyk, M, Batozskaya, V, Batsukh, B, Battista, V, Bay, A, Beaucourt, L, Beddow, J, Bedeschi, F, Bediaga, I, Bel, LJ, Bellee, V, Belloli, N, Belous, K, Belyaev, I, Ben-Haim, E, Bencivenni, G, Benson, S, Benton, J, Berezhnoy, A, Bernet, R, Bertolin, A, Betti, F, Bettler, M-O, van Beuzekom, M, Bezshyiko, I, Bifani, S, Billoir, P, Bird, T, Birnkraut, A, Bitadze, A, Bizzeti, A, Blake, T, Blanc, F, Blouw, J, Blusk, S, Bocci, V, Boettcher, T, Bondar, A, Bondar, N, Bonivento, 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Hernando Morata, JA, van Herwijnen, E, Hess, M, Hicheur, A, Hill, D, Hombach, C, Hopchev, H, Hulsbergen, W, Humair, T, Hushchyn, M, Hussain, N, Hutchcroft, D ORCID: 0000-0002-4174-6509, Idzik, M, Ilten, P, Jacobsson, R, Jaeger, A, Jalocha, J, Jans, E, Jawahery, A, Jiang, F, John, M, Johnson, D, Jones, CR, Joram, C, Jost, B, Jurik, N, Kandybei, S, Kanso, W, Karacson, M, Kariuki, JM, Karodia, S, Kecke, M, Kelsey, M, Kenyon, IR, Kenzie, M, Ketel, T, Khairullin, E, Khanji, B, Khurewathanakul, C, Kirn, T, Klaver, S, Klimaszewski, K, Koliiev, S, Kolpin, M, Komarov, I, Koopman, RF, Koppenburg, P, Kozachuk, A, Kozeiha, M, Kravchuk, L, Kreplin, K, Kreps, M, Krokovny, P, Kruse, F, Krzemien, W, Kucewicz, W, Kucharczyk, M, Kudryavtsev, V, Kuonen, AK, Kurek, K, Kvaratskheliya, T, Lacarrere, D, Lafferty, G, Lai, A, Lambert, D, Lanfranchi, G, Langenbruch, C, Latham, T, Lazzeroni, C, Le Gac, R, van Leerdam, J, Lees, J-P, Leflat, A, LefranOois, J, Lefevre, R, Lemaitre, F, Lemos Cid, E, Leroy, O, 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(2017)
Measurement of matter-antimatter differences in beauty baryon decays.
NATURE PHYSICS, 13 (4).
391-+.
Abstract
Differences in the behaviour of matter and antimatter have been observed in
$K$ and $B$ meson decays, but not yet in any baryon decay. Such differences are
associated with the non-invariance of fundamental interactions under the
combined charge-conjugation and parity transformations, known as $C\!P$
violation. Using data from the LHCb experiment at the Large Hadron Collider, a
search is made for $C\!P$-violating asymmetries in the decay angle
distributions of $\Lambda^0_b$ baryons decaying to $p\pi^-\pi^+\pi^-$ and
$p\pi^-K^+K^-$ final states. These four-body hadronic decays are a promising
place to search for sources of $C\!P$ violation both within and beyond the
Standard Model of particle physics. We find evidence for $C\!P$ violation in
$\Lambda^0_b$ to $p\pi^-\pi^+\pi^-$ decays with a statistical significance
corresponding to 3.3 standard deviations including systematic uncertainties.
This represents the first evidence for $C\!P$ violation in the baryon sector.
Item Type: |
Article
|
Additional Information: |
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-2016-030.html |
Uncontrolled Keywords: |
hep-ex, hep-ex |
Depositing User: |
Symplectic Admin
|
Date Deposited: |
04 May 2017 11:40 |
Last Modified: |
19 Jan 2023 07:05 |
DOI: |
10.1038/NPHYS4021 |
Related URLs: |
|
URI: |
https://livrepository.liverpool.ac.uk/id/eprint/3007241 |