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Measurement of matter-antimatter differences in beauty baryon decays

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Title: Measurement of matter-antimatter differences in beauty baryon decays
Authors: Aaij, R
Adeva, B
Adinolfi, M
Ajaltouni, Z
Akar, S
Albrecht, J
Alessio, F
Alexander, M
Ali, S
Alkhazov, G
Cartelle, PA
Alves, AA
Amato, S
Amerio, S
Amhis, Y
An, L
Anderlini, L
Andreassi, G
Andreotti, M
Andrews, JE
Appleby, RB
Archilli, F
D'Argent, P
Romeu, JA
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, W
Borgheresi, A
Borghi, S
Borisyak, M
Borsato, M
Bossu, F
Boubdir, M
Bowcock, TJV
Bowen, E
Bozzi, C
Braun, S
Britsch, M
Britton, T
Brodzicka, J
Buchanan, E
Burr, C
Bursche, A
Buytaert, J
Cadeddu, S
Calabrese, R
Calvi, M
Calvo Gomez, M
Camboni, A
Campana, P
Perez, DC
Perez, DHC
Capriotti, L
Carbone, A
Carboni, G
Cardinale, R
Cardini, A
Carniti, P
Carson, L
Carvalho Akiba, K
Casse, G
Cassina, L
Garcia, LC
Cattaneo, M
Cauet, C
Cavallero, G
Cenci, R
Charles, M
Charpentier, P
Chatzikonstantinidis, G
Chefdeville, M
Chen, S
Cheung, S-F
Chobanova, V
Chrzaszcz, M
Cid Vidal, X
Ciezarek, G
Clarke, PEL
Clemencic, M
Cliff, HV
Closier, J
Coco, V
Cogan, J
Cogneras, E
Cogoni, V
Cojocariu, L
Collazuol, G
Collins, P
Comerma-Montells, A
Contu, A
Cook, A
Coquereau, S
Corti, G
Corvo, M
Sobral, CMC
Couturier, B
Cowan, GA
Craik, DC
Crocombe, A
Cruz Torres, M
Cunliffe, S
Currie, R
D'Ambrosio, C
Da Cunha Marinho, F
Dall'Occo, E
Dalseno, J
David, PNY
Davis, A
De Aguiar Francisco, O
De Bruyn, K
De Capua, S
De Cian, M
De Miranda, JM
De Paula, L
De Serio, M
De Simone, P
Dean, C-T
Decamp, D
Deckenhoff, M
Del Buono, L
Demmer, M
Derkach, D
Deschamps, O
Dettori, F
Dey, B
Di Canto, A
Dijkstra, H
Dordei, F
Dorigo, M
Dosil Suarez, A
Dovbnya, A
Dreimanis, K
Dufour, L
Dujany, G
Dungs, K
Durante, P
Dzhelyadin, R
Dziurda, A
Dzyuba, A
Deleage, N
Easo, S
Ebert, M
Egede, U
Egorychev, V
Eidelman, S
Eisenhardt, S
Eitschberger, U
Ekelhof, R
Eklund, L
Elsasser, C
Ely, S
Esen, S
Evans, HM
Evans, T
Falabella, A
Farley, N
Farry, S
Fay, R
Fazzini, D
Ferguson, D
Fernandez Albor, V
Fernandez Prieto, A
Ferrari, F
Ferreira Rodrigues, F
Ferro-Luzzi, M
Filippov, S
Fini, RA
Fiore, M
Fiorini, M
Firlej, M
Fitzpatrick, C
Fiutowski, T
Fleuret, F
Fohl, K
Fontana, M
Fontanelli, F
Forshaw, DC
Forty, R
Lima, VF
Frank, M
Frei, C
Fu, J
Furfaro, E
Farber, C
Gallas Torreira, A
Galli, D
Gallorini, S
Gambetta, S
Gandelman, M
Gandini, P
Gao, Y
Garcia Martin, LM
Garcia Pardinas, J
Tico, JG
Garrido, L
Garsed, PJ
Gascon, D
Gaspar, C
Gavardi, L
Gazzoni, G
Gerick, D
Gersabeck, E
Gersabeck, M
Gershon, T
Ghez, P
Giani, S
Gibson, V
Girard, OG
Giubega, L
Gizdov, K
Gligorov, VV
Golubkov, D
Golutvin, A
Gomes, A
Gorelov, IV
Gotti, C
Gandara, MG
Graciani Diaz, R
Cardoso, LAG
Grauges, E
Graverini, E
Graziani, G
Grecu, A
Griffith, P
Grillo, L
Cazon, BRG
Gruenberg, O
Gushchin, E
Guz, Y
Gys, T
Gobel, C
Hadavizadeh, T
Hadjivasiliou, C
Haefeli, G
Haen, C
Haines, SC
Hall, S
Hamilton, B
Han, X
Hansmann-Menzemer, S
Harnew, N
Harnew, ST
Harrison, J
Hatch, M
He, J
Head, T
Heister, A
Hennessy, K
Henrard, P
Henry, L
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
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
Lesiak, T
Leverington, B
Li, Y
Likhomanenko, T
Lindner, R
Linn, C
Lionetto, F
Liu, B
Liu, X
Loh, D
Longstaff, I
Lopes, JH
Lucchesi, D
Lucio Martinez, M
Luo, H
Lupato, A
Luppi, E
Lupton, O
Lusiani, A
Lyu, X
Machefert, F
Maciuc, F
Maev, O
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Malde, S
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Maltsev, T
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Mancinelli, G
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Martinelli, M
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Wormser, G
Wotton, SA
Wraight, K
Wright, S
Wyllie, K
Xie, Y
Xing, Z
Xu, Z
Yang, Z
Yin, H
Yu, J
Yuan, X
Yushchenko, O
Zarebski, KA
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Zhelezov, A
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Item Type: Journal Article
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 CP violation. Here, using data from the LHCb experiment at the Large Hadron Collider, we search for CP-violating asymmetries in the decay angle distributions of Λb0 baryons decaying to pπ−π+π− and pπ−K+K− final states. These four-body hadronic decays are a promising place to search for sources of CP violation both within and beyond the standard model of particle physics. We find evidence for CP violation in Λb0 to pπ−π+π− decays with a statistical significance corresponding to 3.3 standard deviations including systematic uncertainties. This represents the first evidence for CP violation in the baryon sector.
Issue Date: 30-Jan-2017
Date of Acceptance: 21-Dec-2016
URI: http://hdl.handle.net/10044/1/59691
DOI: https://dx.doi.org/10.1038/NPHYS4021
ISSN: 1745-2473
Publisher: NATURE PUBLISHING GROUP
Start Page: 391
End Page: 396
Journal / Book Title: NATURE PHYSICS
Volume: 13
Copyright Statement: © 2017 Macmillan Publishers Limited, part of Springer Nature. All rights reserved. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
Keywords: Science & Technology
Physical Sciences
Physics, Multidisciplinary
Physics
CP-VIOLATION
LAMBDA(B)
hep-ex
01 Mathematical Sciences
02 Physical Sciences
Fluids & Plasmas
Publication Status: Published
Open Access location: http://doi.org/10.1038/NPHYS4021
Online Publication Date: 2017-01-30
Appears in Collections:Physics
High Energy Physics



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