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Test of lepton universality with Lambda(0)(b) -> pK(-) l(+)l(-)

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Title: Test of lepton universality with Lambda(0)(b) -> pK(-) l(+)l(-)
Authors: Aaij, R
Beteta, CA
Ackernley, T
Adeva, B
Adinol, M
Afsharnia, H
Aidala, CA
Aiola, S
Ajaltouni, Z
Akar, S
Albicocco, P
Albrecht, J
Alessio, F
Alexander, M
Alfonso Albero, A
Alkhazov, G
Cartelle, PA
Alves Jr, AA
Amato, S
Amhis, Y
An, L
Anderlini, L
Andreassi, G
Andreotti, M
Archilli, F
Romeu, JA
Artamonov, A
Artuso, M
Arzymatov, K
Aslanides, E
Atzeni, M
Audurier, B
Bachmann, S
Back, JJ
Baker, S
Balagura, V
Baldini, W
Baranov, A
Barlow, RJ
Barsuk, S
Barter, W
Bartolini, M
Baryshnikov, F
Bassi, G
Batozskaya, V
Batsukh, B
Battig, A
Bay, A
Becker, M
Bedeschi, F
Bediaga, I
Beiter, A
Bel, LJ
Belavin, V
Belin, S
Beliy, N
Bellee, V
Belous, K
Belyaev, I
Bencivenni, G
Ben-Haim, E
Benson, S
Beranek, S
Berezhnoy, A
Bernet, R
Berningho, D
Bernstein, HC
Bertella, C
Bertholet, E
Bertolin, A
Betancourt, C
Betti, F
Bettler, MO
Bezshyiko, I
Bhasin, S
Bhom, J
Bieker, MS
Bifani, S
Billoir, P
Bizzeti, A
Bjorn, M
Blago, MP
Blake, T
Blanc, F
Blusk, S
Bobulska, D
Bocci, V
Boente Garcia, O
Boettcher, T
Boldyrev, A
Bondar, A
Bondar, N
Borghi, S
Borisyak, M
Borsato, M
Borsuk, JT
Bowcock, TJ
Bozzi, C
Bradley, MJ
Braun, S
Rodriguez, AB
Brodski, M
Brodzicka, J
Gonzalo, AB
Brundu, D
Buchanan, E
Buechler-Germann, A
Buonaura, A
Burr, C
Bursche, A
Butter, JS
Buytaert, J
Byczynski, W
Cadeddu, S
Cai, H
Calabrese, R
Diaz, LC
Cali, S
Calladine, R
Calvi, M
Calvo Gomez, M
Magalhaes, PC
Camboni, A
Campana, P
Perez, DHC
Capriotti, L
Carbone, A
Carboni, G
Cardinale, R
Cardini, A
Carniti, P
Akiba, KC
Casais Vidal, A
Casse, G
Cattaneo, M
Cavallero, G
Celani, S
Cenci, R
Cerasoli, J
Chapman, MG
Charles, M
Charpentier, P
Chatzikonstantinidis, G
Chefdeville, M
Chekalina, V
Chen, C
Chen, S
Chernov, A
Chitic, S-G
Chobanova, V
Chrzaszcz, M
Chubykin, A
Ciambrone, P
Cicala, MF
Cid Vidal, X
Ciezarek, G
Cindolo, F
Clarke, PEL
Clemencic, M
Cli, H
Closier, J
Cobbledick, JL
Coco, V
Coelho, JAB
Cogan, J
Cogneras, E
Cojocariu, L
Collins, P
Colombo, T
Comerma-Montells, A
Contu, A
Cooke, N
Coombs, G
Coquereau, S
Corti, G
Sobral, CMC
Couturier, B
Craik, DC
Crkovska, J
Crocombe, A
Cruz Torres, M
Currie, R
Da Silva, CL
Dall'Occo, E
Dalseno, J
D'Ambrosio, C
Danilina, A
D'Argent, P
Davis, A
Francisco, ODA
De Bruyn, K
De Capua, S
De Cian, M
De Miranda, JM
De Paula, L
De Serio, M
De Simone, P
De Vries, JA
Dean, CT
Dean, W
Decamp, D
Del Buono, L
Delaney, B
Dembinski, H-P
Demmer, M
Dendek, A
Denysenko, V
Derkach, D
Deschamps, O
Desse, F
Dettori, F
Dey, B
Di Canto, A
Di Nezza, P
Didenko, S
Dijkstra, H
Dobishuk, V
Dordei, F
Dorigo, M
Dos Reis, AC
Douglas, L
Dovbnya, A
Dreimanis, K
Dudek, MW
Dufour, L
Dujany, G
Durante, P
Durham, JM
Dutta, D
Dziewiecki, M
Dziurda, A
Dzyuba, A
Easo, S
Egede, U
Egorychev, V
Eidelman, S
Eisenhardt, S
Ekelhof, R
Ek-In, S
Eklund, L
Ely, S
Ene, A
Epple, E
Escher, S
Esen, S
Evans, T
Falabella, A
Fan, J
Farley, N
Farry, S
Fazzini, D
Fedin, P
Feo, M
Declara, PF
Fernandez Prieto, A
Ferrari, F
Lopes, LF
Rodrigues, FF
Sole, SF
Ferrillo, M
Ferro-Luzzi, M
Filippov, S
Fini, RA
Fiorini, M
Firlej, M
Fischer, KM
Fitzpatrick, C
Fiutowski, T
Fleuret, F
Fontana, M
Fontanelli, F
Forty, R
Lima, VF
Sevilla, MF
Frank, M
Frei, C
Friday, DA
Fu, J
Fuehring, Q
Funk, W
Gabriel, E
Gallas Torreira, A
Galli, D
Gallorini, S
Gambetta, S
Gan, Y
Gandelman, M
Gandini, P
Gao, Y
Garcia Martin, LM
Pardinas, JG
Garcia Plana, B
Rosales, FAG
Tico, JG
Garrido, L
Gascon, D
Gaspar, C
Gerick, D
Gersabeck, E
Gersabeck, M
Gershon, T
Gerstel, D
Ghez, P
Gibson, V
Gioventu, A
Girard, OG
Gironella Gironell, P
Giubega, L
Giugliano, C
Gizdov, K
Gligorov, VV
Gobel, C
Golobardes, E
Golubkov, D
Golutvin, A
Gomes, A
Gorbounov, P
Gorelov, I
Gotti, C
Govorkova, E
Grabowski, JP
Diaz, RG
Grammatico, T
Cardoso, LAG
Grauges, E
Graverini, E
Graziani, G
Grecu, A
Greim, R
Grith, P
Grillo, L
Gruber, L
Cazon, BRG
Gu, C
Gushchin, E
Guth, A
Guz, Y
Gys, T
Guenther, PA
Hadavizadeh, T
Haefeli, G
Haen, C
Haines, SC
Hamilton, PM
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Han, X
Hancock, TH
Hansmann-Menzemer, S
Harnew, N
Harrison, T
Hart, R
Hasse, C
Hatch, M
He, J
Hecker, M
Heijho, K
Heinicke, K
Heister, A
Hennequin, AM
Hennessy, K
Henry, L
Heuel, J
Hicheur, A
Hill, D
Hilton, M
Hopchev, PH
Hu, J
Hu, W
Huang, W
Hulsbergen, W
Humair, T
Hunter, RJ
Hushchyn, M
Hutchcroft, D
Hynds, D
Ibis, P
Idzik, M
Ilten, P
Inglessi, A
Inyakin, A
Ivshin, K
Jacobsson, R
Jakobsen, S
Jans, E
Jashal, BK
Jawahery, A
Jevtic, V
Jiang, F
John, M
Johnson, D
Jones, CR
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Jurik, N
Kandybei, S
Karacson, M
Kariuki, JM
Kazeev, N
Kecke, M
Keizer, F
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Khanji, B
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Kim, KE
Kirn, T
Kirsebom, VS
Klaver, S
Klimaszewski, K
Koliiev, S
Kondybayeva, A
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Kopciewicz, P
Kopecna, R
Koppenburg, P
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Kravchuk, L
Krawczyk, RD
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Krupa, W
Krzemien, W
Kucewicz, W
Kucharczyk, M
Kudryavtsev, V
Kuindersma, HS
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Kvaratskheliya, T
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La Erty, G
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Langenbruch, C
Lantwin, O
Latham, T
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Le Gac, R
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Lindner, R
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Liu, G
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Lomba Castro, J
Longsta, I
Lopes, JH
Loustau, G
Lovell, GH
Lu, Y
Lucchesi, D
Martinez, ML
Luo, Y
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Zdybal, M
Zeng, M
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Zucchelli, S
Item Type: Journal Article
Abstract: The ratio of branching fractions of the decays Λ0b → pK−e+e− and Λ0b → pK−μ+μ−,R−1pK, is measured for the first time using proton-proton collision data corresponding to an integrated luminosity of 4.7 fb−1 recorded with the LHCb experiment at center-of-mass energies of 7, 8 and 13 TeV. In the dilepton mass-squared range 0.1 < q2< 6.0 GeV2/c4 and the pK− mass range m(pK−) < 2600 MeV/c2, the ratio of branching fractions is measured to be R−1pK=1.17+0.18−0.16±0.07, where the first uncertainty is statistical and the second systematic. This is the first test of lepton universality with b baryons and the first observation of the decay Λ0b → pK−e+e−.
Issue Date: 11-May-2020
Date of Acceptance: 10-Apr-2020
URI: http://hdl.handle.net/10044/1/80022
DOI: 10.1007/JHEP05(2020)040
ISSN: 1029-8479
Publisher: Springer Verlag (Germany)
Start Page: 1
End Page: 27
Journal / Book Title: The Journal of High Energy Physics
Volume: 2020
Issue: 5
Copyright Statement: © 2020. This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0) (https://creativecommons.org/licenses/by/4.0/), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.
Keywords: Science & Technology
Physical Sciences
Physics, Particles & Fields
Physics
B physics
Branching fraction
Flavour Changing Neutral Currents
Hadron
Hadron scattering (experiments)
Rare decay
DECAY
Science & Technology
Physical Sciences
Physics, Particles & Fields
Physics
B physics
Branching fraction
Flavour Changing Neutral Currents
Hadron
Hadron scattering (experiments)
Rare decay
DECAY
hep-ex
hep-ex
0105 Mathematical Physics
0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics
0206 Quantum Physics
Nuclear & Particles Physics
Publication Status: Published
Open Access location: https://link.springer.com/article/10.1007%2FJHEP05%282020%29040
Article Number: ARTN 40
Online Publication Date: 2020-05-11
Appears in Collections:Physics
High Energy Physics