Observation of the decay Lambda(0)(b) -> pK(-)mu(+)mu(-) and a search for CP violation

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Title: Observation of the decay Lambda(0)(b) -> pK(-)mu(+)mu(-) and a search for CP violation
Authors: Aaij, R
Adeva, B
Adinolfi, M
Ajaltouni, Z
Akar, S
Albrecht, J
Alessio, F
Alexander, M
Ali, S
Alkhazov, G
Alvarez Cartelle, P
Dijkstra, H
Dordei, F
Dorigo, M
Dosil Suarez, A
Dovbnya, A
Dreimanis, K
Dufour, L
Dujany, G
Dungs, K
Andrews, JE
Cadeddu, S
Durante, P
Dzhelyadin, R
Dziurda, A
Dzyuba, A
Deleage, N
Easo, S
Ebert, M
Egede, U
Egorychev, V
Eidelman, S
Calabrese, R
Appleby, RB
Eisenhardt, S
Eitschberger, U
Ekelhof, R
Eklund, L
Ely, S
Esen, S
Evans, HM
Evans, T
Falabella, A
Calvi, M
Farley, N
Archilli, F
Farry, S
Fay, R
Fazzini, D
Ferguson, D
Fernandez Prieto, A
Ferrari, F
Ferreira Rodrigues, F
Ferro-Luzzi, M
Calvo Gomez, M
Filippov, S
Fini, RA
D'Argent, P
Fiore, M
Fiorini, M
Firlej, M
Fitzpatrick, C
Fiutowski, T
Fleuret, F
Fohl, K
Camboni, A
Fontana, M
Fontanelli, F
Forshaw, DC
Romeu, JA
Forty, R
Lima, VF
Frank, M
Frei, C
Fu, J
Funk, W
Campana, P
Furfaro, E
Faerber, C
Torreira, AG
Galli, D
Artamonov, A
Gallorini, S
Gambetta, S
Gandelman, M
Gandini, P
Gao, Y
Perez, DHC
Martin, LMG
Garcia Pardinas, J
Tico, JG
Garrido, L
Garsed, PJ
Artuso, M
Gascon, D
Gaspar, C
Gavardi, L
Gazzoni, G
Capriotti, L
Gerick, D
Gersabeck, E
Gersabeck, M
Gershon, T
Ghez, P
Giani, S
Aslanides, E
Gibson, V
Girard, OG
Giubega, L
Carbone, A
Gizdov, K
Gligorov, VV
Golubkov, D
Golutvin, A
Gomes, A
Gorelov, IV
Gotti, C
Auriemma, G
Graciani Diaz, R
Cardoso, LAG
Carboni, G
Grauges, E
Graverini, E
Graziani, G
Grecu, A
Griffith, P
Grillo, L
Cazon, BRG
Gruenberg, O
Baalouch, M
Gushchin, E
Alves, AA
Guz, Y
Gys, T
Goebel, C
Hadavizadeh, T
Hadjivasiliou, C
Haefeli, G
Haen, C
Haines, SC
Hamilton, B
Babuschkin, I
Cardinale, R
Han, X
Hansmann-Menzemer, S
Harnew, N
Harnew, ST
Harrison, J
Hatch, M
He, J
Head, T
Heister, A
Hennessy, K
Cardini, A
Bachmann, S
Henrard, P
Henry, L
Van Herwijnen, E
Hess, M
Hicheur, A
Hill, D
Hombach, C
Hopchev, PH
Hulsbergen, W
Carniti, P
Humair, T
Back, JJ
Hushchyn, M
Hutchcroft, D
Idzik, M
Ilten, P
Jacobsson, R
Jaeger, A
Jalocha, J
Jans, E
Carson, L
Jawahery, A
Jiang, F
Badalov, A
John, M
Johnson, D
Jones, CR
Joram, C
Jost, B
Jurik, N
Kandybei, S
Carvalho Akiba, K
Karacson, M
Kariuki, JM
Karodia, S
Baesso, C
Kecke, M
Kelsey, M
Kenzie, M
Ketel, T
Khairullin, E
Khanji, B
Casse, G
Khurewathanakul, C
Kirn, T
Klaver, S
Klimaszewski, K
Baker, S
Koliiev, S
Kolpin, M
Komarov, I
Koopman, RF
Koppenburg, P
Cassina, L
Kosmyntseva, A
Kozachuk, A
Kozeiha, M
Kravchuk, L
Kreplin, K
Balagura, V
Kreps, M
Krokovny, P
Kruse, F
Krzemien, W
Garcia, LC
Kucewicz, W
Kucharczyk, M
Kudryavtsev, V
Kuonen, AK
Kurek, K
Kvaratskheliya, T
Baldini, W
Lacarrere, D
Lafferty, G
Lai, A
Cattaneo, M
Lanfranchi, G
Langenbruch, C
Latham, T
Lazzeroni, C
Le Gac, R
Van Leerdam, J
Leflat, A
Barlow, RJ
Lefrancois, J
Lefevre, R
Cavallero, G
Lemaitre, F
Lemos Cid, E
Leroy, O
Lesiak, T
Leverington, B
Li, T
Li, Y
Likhomanenko, T
Barschel, C
Lindner, R
Amato, S
Linn, C
Lionetto, F
Liu, X
Loh, D
Longstaff, I
Lopes, JH
Lucchesi, D
Lucio Martinez, M
Luo, H
Barsuk, S
Cenci, R
Lupato, A
Luppi, E
Lupton, O
Lusiani, A
Lyu, X
Machefert, F
Maciuc, F
Maev, O
Maguire, K
Malde, S
Chamont, D
Barter, W
Malinin, A
Maltsev, T
Manca, G
Mancinelli, G
Manning, P
Marangotto, D
Maratas, J
Marchand, JF
Marconi, U
Charles, M
Marin Benito, C
Baryshnikov, F
Marinangeli, M
Marino, P
Marks, J
Martellotti, G
Martin, M
Martinelli, M
Martinez Santos, D
Martinez Vidal, F
Charpentier, P
Martins Tostes, D
Massacrier, LM
Baszczyk, M
Massafferri, A
Matev, R
Mathad, A
Mathe, Z
Matteuzzi, C
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Maurice, E
Chatzikonstantinidis, G
Maurin, B
Mazurov, A
McCann, M
Batozskaya, V
McNab, A
McNulty, R
Meadows, B
Meier, F
Meissner, M
Melnychuk, D
Chefdeville, M
Merk, M
Merli, A
Michielin, E
Milanes, DA
Batsukh, B
Minard, M-N
Mitzel, DS
Mogini, A
Molina Rodriguez, J
Monroy, IA
Chen, S
Monteil, S
Morandin, M
Morawski, P
Morda, A
Morello, MJ
Battista, V
Morgunova, O
Moron, J
Morris, AB
Mountain, R
Cheung, SF
Muheim, F
Mulder, M
Mussini, M
Mueller, D
Mueller, J
Mueller, K
Bay, A
Mueller, V
Naik, P
Nakada, T
Chobanova, V
Nandakumar, R
Nandi, A
Nasteva, I
Needham, M
Neri, N
Neubert, S
Neufeld, N
Beaucourt, L
Neuner, M
Nguyen, TD
Chrzaszcz, M
Nguyen-Mau, C
Nieswand, S
Niet, R
Nikitin, N
Nikodem, T
Nogay, A
Novoselov, A
O'Hanlon, DP
Beddow, J
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Oldeman, R
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Item Type: Journal Article
Abstract: A search for CP violation in the decay Λb0 → pK−μ+μ− is presented. This decay is mediated by flavour-changing neutral-current transitions in the Standard Model and is potentially sensitive to new sources of CP violation. The study is based on a data sample of proton-proton collisions recorded with the LHCb experiment, corresponding to an integrated luminosity of 3 fb−1. The Λb0 → pK−μ+μ− decay is observed for the first time, and two observables that are sensitive to different manifestations of CP violation are measured, ΔACP≡ACP(Λ0b→pK−μ+μ−)−ACP(Λ0b→pK−J/ψ)ΔACP≡ACP(Λb0→pK−μ+μ−)−ACP(Λb0→pK−J/ψ) and aaTˆ-oddCPaCPT^-odd, where the latter is based on asymmetries in the angle between the μ+μ− and pK− decay planes. These are measured to be ΔACP=(−3.5±5.0(stat)±0.2(syst))×10−2,aTˆ-oddCP=(1.2±5.0(stat)±0.7(syst))×10−2, ΔACP=(−3.5±5.0(stat)±0.2(syst))×10−2,aCPT^-odd=(1.2±5.0(stat)±0.7(syst))×10−2, and no evidence for CP violation is found.
Issue Date: 21-Jun-2017
Date of Acceptance: 25-Mar-2017
URI: http://hdl.handle.net/10044/1/51177
DOI: https://dx.doi.org/10.1007/JHEP06(2017)108
ISSN: 1029-8479
Publisher: Springer Verlag (Germany)
Journal / Book Title: Journal of High Energy Physics
Volume: 2017
Issue: 6
Copyright Statement: Open Access, Copyright CERN, for the benefit of the LHCb Collaboration. Article funded by SCOAP3
Keywords: Science & Technology
Physical Sciences
Physics, Particles & Fields
Physics
B physics
CP violation
FCNC Interaction
Hadron-Hadron scattering (experiments)
BARYON ASYMMETRY
hep-ex
hep-ex
Science & Technology
Physical Sciences
Physics, Particles & Fields
Physics
B physics
CP violation
FCNC Interaction
Hadron-Hadron scattering (experiments)
BARYON ASYMMETRY
01 Mathematical Sciences
02 Physical Sciences
Nuclear & Particles Physics
Publication Status: Published
Open Access location: http://dx.doi.org/10.1007/JHEP06(2017)108
Article Number: 108
Appears in Collections:Physics
High Energy Physics
Faculty of Natural Sciences



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