Observation of the Doubly Charmed Baryon Ξ_{cc}^{++}.
نویسندگان
- R Aaij
- B Adeva
- M Adinolfi
- Z Ajaltouni
- S Akar
- J Albrecht
- F Alessio
- M Alexander
- A Alfonso Albero
- S Ali
- G Alkhazov
- P Alvarez Cartelle
- A A Alves
- S Amato
- S Amerio
- Y Amhis
- L An
- L Anderlini
- G Andreassi
- M Andreotti
- J E Andrews
- R B Appleby
- F Archilli
- P d'Argent
- J Arnau Romeu
- A Artamonov
- M Artuso
- E Aslanides
- G Auriemma
- M Baalouch
- I Babuschkin
- S Bachmann
- J J Back
- A Badalov
- C Baesso
- S Baker
- V Balagura
- W Baldini
- A Baranov
- R J Barlow
- C Barschel
- S Barsuk
- W Barter
- F Baryshnikov
- V Batozskaya
- V Battista
- A Bay
- L Beaucourt
- J Beddow
- F Bedeschi
- I Bediaga
- A Beiter
- L J Bel
- N Beliy
- V Bellee
- N Belloli
- K Belous
- I Belyaev
- E Ben-Haim
- G Bencivenni
- S Benson
- S Beranek
- A Berezhnoy
- R Bernet
- D Berninghoff
- E Bertholet
- A Bertolin
- C Betancourt
- F Betti
- M-O Bettler
- M van Beuzekom
- Ia Bezshyiko
- S Bifani
- P Billoir
- A Birnkraut
- A Bitadze
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- T Blake
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- I Bordyuzhin
- A Borgheresi
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- F Bossu
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- E Bowen
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- T Britton
- J Brodzicka
- D Brundu
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- C Burr
- A Bursche
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- W Byczynski
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- A Camboni
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- D H Campora Perez
- L Capriotti
- A Carbone
- G Carboni
- R Cardinale
- A Cardini
- P Carniti
- L Carson
- K Carvalho Akiba
- G Casse
- L Cassina
- L Castillo Garcia
- M Cattaneo
- G Cavallero
- R Cenci
- D Chamont
- M Charles
- Ph Charpentier
- G Chatzikonstantinidis
- M Chefdeville
- S Chen
- S F Cheung
- S-G Chitic
- V Chobanova
- M Chrzaszcz
- A Chubykin
- P Ciambrone
- X Cid Vidal
- G Ciezarek
- P E L Clarke
- M Clemencic
- H V Cliff
- J Closier
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- E Cogneras
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- L Cojocariu
- P Collins
- T Colombo
- A Comerma-Montells
- A Contu
- A Cook
- G Coombs
- S Coquereau
- G Corti
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- C M Costa Sobral
- B Couturier
- G A Cowan
- D C Craik
- A Crocombe
- M Cruz Torres
- R Currie
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- F Da Cunha Marinho
- E Dall'Occo
- J Dalseno
- A Davis
- O De Aguiar Francisco
- S De Capua
- M De Cian
- J M De Miranda
- L De Paula
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- P De Simone
- C T Dean
- D Decamp
- L Del Buono
- H-P Dembinski
- M Demmer
- A Dendek
- D Derkach
- O Deschamps
- F Dettori
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- A Dziurda
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- V Egorychev
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- U Eitschberger
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- Yu Guz
- T Gys
- C Göbel
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- G Haefeli
- C Haen
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- B Hamilton
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- N Harnew
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- D Hill
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- W Hulsbergen
- T Humair
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- A Jawahery
- F Jiang
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- J M Kariuki
- S Karodia
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- M Kelsey
- M Kenzie
- T Ketel
- E Khairullin
- B Khanji
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- T Klimkovich
- S Koliiev
- M Kolpin
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- R Kopecna
- P Koppenburg
- A Kosmyntseva
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- F Kruse
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- A K Kuonen
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- A Lai
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- C Langenbruch
- T Latham
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- E Lemos Cid
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- T Lesiak
- B Leverington
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- T Li
- Y Li
- Z Li
- T Likhomanenko
- R Lindner
- F Lionetto
- V Lisovskyi
- X Liu
- D Loh
- A Loi
- I Longstaff
- J H Lopes
- D Lucchesi
- M Lucio Martinez
- H Luo
- A Lupato
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- O Lupton
- A Lusiani
- X Lyu
- F Machefert
- F Maciuc
- V Macko
- P Mackowiak
- B Maddock
- S Maddrell-Mander
- O Maev
- K Maguire
- D Maisuzenko
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- A Malinin
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- P Manning
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- C Marin Benito
- M Marinangeli
- P Marino
- J Marks
- G Martellotti
- M Martin
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- D Martinez Santos
- F Martinez Vidal
- D Martins Tostes
- L M Massacrier
- A Massafferri
- R Matev
- A Mathad
- Z Mathe
- C Matteuzzi
- A Mauri
- E Maurice
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- A McNab
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- L Minzoni
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چکیده
A highly significant structure is observed in the Λ_{c}^{+}K^{-}π^{+}π^{+} mass spectrum, where the Λ_{c}^{+} baryon is reconstructed in the decay mode pK^{-}π^{+}. The structure is consistent with originating from a weakly decaying particle, identified as the doubly charmed baryon Ξ_{cc}^{++}. The difference between the masses of the Ξ_{cc}^{++} and Λ_{c}^{+} states is measured to be 1334.94±0.72(stat.)±0.27(syst.) MeV/c^{2}, and the Ξ_{cc}^{++} mass is then determined to be 3621.40±0.72(stat.)±0.27(syst.)±0.14(Λ_{c}^{+}) MeV/c^{2}, where the last uncertainty is due to the limited knowledge of the Λ_{c}^{+} mass. The state is observed in a sample of proton-proton collision data collected by the LHCb experiment at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 1.7 fb^{-1}, and confirmed in an additional sample of data collected at 8 TeV.
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ورودعنوان ژورنال:
- Physical review letters
دوره 119 11 شماره
صفحات -
تاریخ انتشار 2017