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Observation of New Ξ_{c}^{0} Baryons Decaying to Λ_{c}^{+}K^{-}

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PhysRevLett.124.222001.pdfPublished version531.54 kBAdobe PDFView/Open
Title: Observation of New Ξ_{c}^{0} Baryons Decaying to Λ_{c}^{+}K^{-}
Authors: Aaij, R
Abellán Beteta, C
Ackernley, T
Adeva, B
Adinolfi, M
Afsharnia, H
Aidala, CA
Aiola, S
Ajaltouni, Z
Akar, S
Albrecht, J
Alessio, F
Alexander, M
Alfonso Albero, A
Alkhazov, G
Alvarez Cartelle, P
Alves, AA
Amato, S
Amhis, Y
An, L
Anderlini, L
Andreassi, G
Andreotti, M
Archilli, F
Artamonov, A
Artuso, M
Arzymatov, K
Aslanides, E
Atzeni, M
Audurier, B
Bachmann, S
Back, JJ
Baker, S
Balagura, V
Baldini, W
Baptista Leite, J
Barlow, RJ
Barsuk, S
Barter, W
Bartolini, M
Baryshnikov, F
Basels, JM
Bassi, G
Batozskaya, V
Batsukh, B
Battig, A
Bay, A
Becker, M
Bedeschi, F
Bediaga, I
Beiter, A
Belavin, V
Belin, S
Bellee, V
Belous, K
Belyaev, I
Bencivenni, G
Ben-Haim, E
Benson, S
Berezhnoy, A
Bernet, R
Berninghoff, 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
Bjørn, 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, TJV
Boyer, A
Bozzi, C
Bradley, MJ
Braun, S
Brea Rodriguez, A
Brodski, M
Brodzicka, J
Brossa Gonzalo, A
Brundu, D
Buchanan, E
Büchler-Germann, A
Buonaura, A
Burr, C
Bursche, A
Butkevich, A
Butter, JS
Buytaert, J
Byczynski, W
Cadeddu, S
Cai, H
Calabrese, R
Calero Diaz, L
Cali, S
Calladine, R
Calvi, M
Calvo Gomez, M
Camargo Magalhaes, P
Camboni, A
Campana, P
Campora Perez, DH
Campoverde Quezada, AF
Capriotti, L
Carbone, A
Carboni, G
Cardinale, R
Cardini, A
Carli, I
Carniti, P
Carvalho Akiba, K
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
Cholak, S
Chrzaszcz, M
Chubykin, A
Chulikov, V
Ciambrone, P
Cicala, MF
Cid Vidal, X
Ciezarek, G
Cindolo, F
Clarke, PEL
Clemencic, M
Cliff, HV
Closier, J
Cobbledick, JL
Coco, V
Coelho, JAB
Cogan, J
Cogneras, E
Cojocariu, L
Collins, P
Colombo, T
Contu, A
Cooke, N
Coombs, G
Coquereau, S
Corti, G
Costa Sobral, CM
Couturier, B
Craik, DC
Crkovská, 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
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
De Vries, JA
Dean, CT
Dean, W
Decamp, D
Del Buono, L
Delaney, B
Dembinski, H-P
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
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Durham, JM
Dutta, D
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Yuan, X
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Zdybal, M
Zeng, M
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LHCb Collaboration
Item Type: Journal Article
Abstract: The Λ_{c}^{+}K^{-} mass spectrum is studied with a data sample of pp collisions at a center-of-mass energy of 13 TeV corresponding to an integrated luminosity of 5.6  fb^{-1} collected by the LHCb experiment. Three Ξ_{c}^{0} states are observed with a large significance and their masses and natural widths are measured to be m[Ξ_{c}(2923)^{0}]=2923.04±0.25±0.20±0.14  MeV, Γ[Ξ_{c}(2923)^{0}]=7.1±0.8±1.8  MeV, m[Ξ_{c}(2939)^{0}]=2938.55±0.21±0.17±0.14  MeV, Γ[Ξ_{c}(2939)^{0}]=10.2±0.8±1.1  MeV, m[Ξ_{c}(2965)^{0}]=2964.88±0.26±0.14±0.14  MeV, Γ[Ξ_{c}(2965)^{0}]=14.1±0.9±1.3  MeV, where the uncertainties are statistical, systematic, and due to the limited knowledge of the Λ_{c}^{+} mass. The Ξ_{c}(2923)^{0} and Ξ_{c}(2939)^{0} baryons are new states. The Ξ_{c}(2965)^{0} state is in the vicinity of the known Ξ_{c}(2970)^{0} baryon; however, their masses and natural widths differ significantly.
Issue Date: 5-Jun-2020
Date of Acceptance: 6-May-2020
URI: http://hdl.handle.net/10044/1/80177
DOI: 10.1103/PhysRevLett.124.222001
ISSN: 0031-9007
Publisher: American Physical Society
Start Page: 222001
End Page: 222001
Journal / Book Title: Physical Review Letters
Volume: 124
Issue: 22
Copyright Statement: © 2020 CERN, for the LHCb Collaboration. Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3.
Keywords: LHCb Collaboration
hep-ex
hep-ex
General Physics
01 Mathematical Sciences
02 Physical Sciences
09 Engineering
Publication Status: Published
Conference Place: United States
Open Access location: https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.124.222001
Article Number: ARTN 222001
Appears in Collections:Physics
High Energy Physics