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Observation of the suppressed decay $Λ^{0}_{b}\rightarrow pπ^{-}μ^{+}μ^{-}$

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Title: Observation of the suppressed decay $Λ^{0}_{b}\rightarrow pπ^{-}μ^{+}μ^{-}$
Authors: Collaboration, L
Aaij, R
Adeva, B
Adinolfi, M
Ajaltouni, Z
Akar, S
Albrecht, J
Alessio, F
Alexander, M
Ali, S
Alkhazov, G
Cartelle, PA
Jr, AAA
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
Betancourt, C
Betti, F
Bettler, M-O
Beuzekom, MV
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
Bordyuzhin, I
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
Gomez, MC
Camboni, A
Campana, P
Perez, DHC
Capriotti, L
Carbone, A
Carboni, G
Cardinale, R
Cardini, A
Carniti, P
Carson, L
Akiba, KC
Casse, G
Cassina, L
Garcia, LC
Cattaneo, M
Cauet, C
Cavallero, G
Cenci, R
Chamont, D
Charles, M
Charpentier, P
Chatzikonstantinidis, G
Chefdeville, M
Chen, S
Cheung, S-F
Chobanova, V
Chrzaszcz, M
Vidal, XC
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
Coombs, G
Coquereau, S
Corti, G
Corvo, M
Sobral, CMC
Couturier, B
Cowan, GA
Craik, DC
Crocombe, A
Torres, MC
Cunliffe, S
Currie, R
D'Ambrosio, C
Marinho, FDC
Dall'Occo, E
Dalseno, J
David, PNY
Davis, A
Francisco, ODA
Bruyn, KD
Capua, SD
Cian, MD
Miranda, JMD
Paula, LD
Serio, MD
Simone, PD
Dean, CT
Decamp, D
Deckenhoff, M
Buono, LD
Demmer, M
Dendek, A
Derkach, D
Deschamps, O
Dettori, F
Dey, B
Canto, AD
Dijkstra, H
Dordei, F
Dorigo, M
Suárez, AD
Dovbnya, A
Dreimanis, K
Dufour, L
Dujany, G
Dungs, K
Durante, P
Dzhelyadin, R
Dziurda, A
Dzyuba, A
Déléage, N
Easo, S
Ebert, M
Egede, U
Egorychev, V
Eidelman, S
Eisenhardt, S
Eitschberger, U
Ekelhof, R
Eklund, L
Ely, S
Esen, S
Evans, HM
Evans, T
Falabella, A
Farley, N
Farry, S
Fay, R
Fazzini, D
Ferguson, D
Prieto, AF
Ferrari, F
Rodrigues, FF
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
Funk, W
Furfaro, E
Färber, C
Torreira, AG
Galli, D
Gallorini, S
Gambetta, S
Gandelman, M
Gandini, P
Gao, Y
Martin, LMG
Pardiñas, JG
Tico, JG
Garrido, L
Garsed, PJ
Gascon, D
Gaspar, C
Gavardi, L
Gazzoni, G
Gerick, D
Gersabeck, E
Gersabeck, M
Gershon, T
Ghez, P
Gianì, S
Gibson, V
Girard, OG
Giubega, L
Gizdov, K
Gligorov, VV
Golubkov, D
Golutvin, A
Gomes, A
Gorelov, IV
Gotti, C
Gándara, MG
Diaz, RG
Cardoso, LAG
Graugés, E
Graverini, E
Graziani, G
Grecu, A
Griffith, P
Grillo, L
Cazon, BRG
Grünberg, O
Gushchin, E
Guz, Y
Gys, T
Göbel, 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
Herwijnen, EV
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
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
Kosmyntseva, A
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
Lanfranchi, G
Langenbruch, C
Latham, T
Lazzeroni, C
Gac, RL
Leerdam, JV
Leflat, A
Lefrançois, J
Lefèvre, R
Lemaitre, F
Cid, EL
Leroy, O
Lesiak, T
Leverington, B
Li, T
Li, Y
Likhomanenko, T
Lindner, R
Linn, C
Lionetto, F
Liu, X
Loh, D
Longstaff, I
Lopes, JH
Lucchesi, D
Martinez, ML
Luo, H
Lupato, A
Luppi, E
Lupton, O
Lusiani, A
Lyu, X
Machefert, F
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Maltsev, T
Manca, G
Mancinelli, G
Manning, P
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Marchand, JF
Marconi, U
Benito, CM
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Marks, J
Martellotti, G
Martin, M
Martinelli, M
Santos, DM
Vidal, FM
Tostes, DM
Massacrier, LM
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Item Type: Journal Article
Abstract: The suppressed decay $\Lambda^{0}_{b}\rightarrow p\pi^{-}\mu^{+}\mu^{-}$, excluding the $J/\psi$ and $\psi(2S)\rightarrow \mu^{+}\mu^{-}$ resonances, is observed for the first time with a significance of 5.5 standard deviations. The analysis is performed with proton-proton collision data corresponding to an integrated luminosity of $3\mathrm{fb}^{-1}$ collected with the LHCb experiment. The $\Lambda^{0}_{b}\rightarrow p\pi^{-}\mu^{+}\mu^{-}$ branching fraction is measured relative to the $\Lambda^{0}_{b}\rightarrow J/\psi(\rightarrow \mu^{+}\mu^{-})p\pi^{-}$ branching fraction giving \begin{align} \nonumber \frac{\mathcal{B}(\Lambda^{0}_{b}\rightarrow p\pi^{-}\mu^{+}\mu^{-})}{\mathcal{B}({\Lambda^{0}_{b}\rightarrow J/\psi(\rightarrow \mu^{+}\mu^{-})p\pi^{-}})} &= 0.044\pm0.012\pm0.007, \end{align} where the first uncertainty is statistical and the second is systematic. This is the first observation of a $b\rightarrow d$ transition in a baryonic decay.
Issue Date: 30-Apr-2017
Date of Acceptance: 20-Mar-2017
URI: http://hdl.handle.net/10044/1/61010
DOI: 10.1007/JHEP04(2017)029
ISSN: 1029-8479
Publisher: Springer Verlag (Germany)
Journal / Book Title: Journal of High Energy Physics
Volume: 2017
Issue: 4
Keywords: hep-ex
01 Mathematical Sciences
02 Physical Sciences
Nuclear & Particles Physics
Notes: 14 pages, 3 figures. 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-2016-049.html
Publication Status: Published
Open Access location: http://doi.org/10.1007/JHEP04(2017)029
Article Number: 29
Online Publication Date: 2017-04-06
Appears in Collections:Physics
High Energy Physics
Faculty of Natural Sciences



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