Observation of the Decays Λ_{b}^{0}→χ_{c1}pK^{-} and Λ_{b}^{0}→χ_{c2}pK^{-}.
نویسندگان
- R Aaij
- B Adeva
- M Adinolfi
- Z Ajaltouni
- S Akar
- J Albrecht
- F Alessio
- M Alexander
- 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
- M Baszczyk
- V Batozskaya
- V Battista
- A Bay
- L Beaucourt
- J Beddow
- F Bedeschi
- I Bediaga
- A Beiter
- L J Bel
- V Bellee
- N Belloli
- K Belous
- I Belyaev
- E Ben-Haim
- G Bencivenni
- S Benson
- S Beranek
- A Berezhnoy
- R Bernet
- A Bertolin
- C Betancourt
- F Betti
- M-O Bettler
- M van Beuzekom
- Ia Bezshyiko
- S Bifani
- P Billoir
- A Birnkraut
- A Bitadze
- A Bizzeti
- T Blake
- F Blanc
- J Blouw
- S Blusk
- V Bocci
- T Boettcher
- A Bondar
- N Bondar
- W Bonivento
- I Bordyuzhin
- A Borgheresi
- S Borghi
- M Borisyak
- M Borsato
- F Bossu
- M Boubdir
- T J V Bowcock
- E Bowen
- C Bozzi
- S Braun
- T Britton
- J Brodzicka
- E Buchanan
- C Burr
- A Bursche
- J Buytaert
- S Cadeddu
- R Calabrese
- M Calvi
- M Calvo Gomez
- A Camboni
- P Campana
- 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
- V Chobanova
- M Chrzaszcz
- A Chubykin
- X Cid Vidal
- G Ciezarek
- P E L Clarke
- M Clemencic
- H V Cliff
- J Closier
- V Coco
- J Cogan
- E Cogneras
- V Cogoni
- L Cojocariu
- P Collins
- A Comerma-Montells
- A Contu
- A Cook
- G Coombs
- S Coquereau
- G Corti
- M Corvo
- C M Costa Sobral
- B Couturier
- G A Cowan
- D C Craik
- A Crocombe
- M Cruz Torres
- S Cunliffe
- R Currie
- C D'Ambrosio
- F Da Cunha Marinho
- E Dall'Occo
- J Dalseno
- A Davis
- O De Aguiar Francisco
- K De Bruyn
- S De Capua
- M De Cian
- J M De Miranda
- L De Paula
- M De Serio
- P De Simone
- C T Dean
- D Decamp
- M Deckenhoff
- L Del Buono
- H-P Dembinski
- M Demmer
- A Dendek
- D Derkach
- O Deschamps
- F Dettori
- B Dey
- A Di Canto
- P Di Nezza
- H Dijkstra
- F Dordei
- M Dorigo
- A Dosil Suárez
- A Dovbnya
- K Dreimanis
- L Dufour
- G Dujany
- K Dungs
- P Durante
- R Dzhelyadin
- M Dziewiecki
- A Dziurda
- A Dzyuba
- N Déléage
- S Easo
- M Ebert
- U Egede
- V Egorychev
- S Eidelman
- S Eisenhardt
- U Eitschberger
- R Ekelhof
- L Eklund
- S Ely
- S Esen
- H M Evans
- T Evans
- A Falabella
- N Farley
- S Farry
- R Fay
- D Fazzini
- D Ferguson
- G Fernandez
- A Fernandez Prieto
- F Ferrari
- F Ferreira Rodrigues
- M Ferro-Luzzi
- S Filippov
- R A Fini
- M Fiore
- M Fiorini
- M Firlej
- C Fitzpatrick
- T Fiutowski
- F Fleuret
- K Fohl
- M Fontana
- F Fontanelli
- D C Forshaw
- R Forty
- V Franco Lima
- M Frank
- C Frei
- J Fu
- W Funk
- E Furfaro
- C Färber
- E Gabriel
- A Gallas Torreira
- D Galli
- S Gallorini
- S Gambetta
- M Gandelman
- P Gandini
- Y Gao
- L M Garcia Martin
- J García Pardiñas
- J Garra Tico
- L Garrido
- P J Garsed
- D Gascon
- C Gaspar
- L Gavardi
- G Gazzoni
- D Gerick
- E Gersabeck
- M Gersabeck
- T Gershon
- Ph Ghez
- S Gianì
- V Gibson
- O G Girard
- L Giubega
- K Gizdov
- V V Gligorov
- D Golubkov
- A Golutvin
- A Gomes
- I V Gorelov
- C Gotti
- E Govorkova
- R Graciani Diaz
- L A Granado Cardoso
- E Graugés
- E Graverini
- G Graziani
- A Grecu
- R Greim
- P Griffith
- L Grillo
- L Gruber
- B R Gruberg Cazon
- O Grünberg
- E Gushchin
- Yu Guz
- T Gys
- C Göbel
- T Hadavizadeh
- C Hadjivasiliou
- G Haefeli
- C Haen
- S C Haines
- B Hamilton
- X Han
- S Hansmann-Menzemer
- N Harnew
- S T Harnew
- J Harrison
- M Hatch
- J He
- T Head
- A Heister
- K Hennessy
- P Henrard
- L Henry
- E van Herwijnen
- M Heß
- A Hicheur
- D Hill
- C Hombach
- P H Hopchev
- Z-C Huard
- W Hulsbergen
- T Humair
- M Hushchyn
- D Hutchcroft
- M Idzik
- P Ilten
- R Jacobsson
- J Jalocha
- E Jans
- A Jawahery
- F Jiang
- M John
- D Johnson
- C R Jones
- C Joram
- B Jost
- N Jurik
- S Kandybei
- M Karacson
- J M Kariuki
- S Karodia
- M Kecke
- M Kelsey
- M Kenzie
- T Ketel
- E Khairullin
- B Khanji
- C Khurewathanakul
- T Kirn
- S Klaver
- K Klimaszewski
- T Klimkovich
- S Koliiev
- M Kolpin
- I Komarov
- R Kopecna
- P Koppenburg
- A Kosmyntseva
- S Kotriakhova
- A Kozachuk
- M Kozeiha
- L Kravchuk
- M Kreps
- P Krokovny
- F Kruse
- W Krzemien
- W Kucewicz
- M Kucharczyk
- V Kudryavtsev
- A K Kuonen
- K Kurek
- T Kvaratskheliya
- D Lacarrere
- G Lafferty
- A Lai
- G Lanfranchi
- C Langenbruch
- T Latham
- C Lazzeroni
- R Le Gac
- J van Leerdam
- A Leflat
- J Lefrançois
- R Lefèvre
- F Lemaitre
- E Lemos Cid
- O Leroy
- T Lesiak
- B Leverington
- T Li
- Y Li
- Z Li
- T Likhomanenko
- R Lindner
- F Lionetto
- X Liu
- D Loh
- I Longstaff
- J H Lopes
- D Lucchesi
- M Lucio Martinez
- H Luo
- A Lupato
- E Luppi
- O Lupton
- A Lusiani
- X Lyu
- F Machefert
- F Maciuc
- O Maev
- K Maguire
- S Malde
- A Malinin
- T Maltsev
- G Manca
- G Mancinelli
- P Manning
- J Maratas
- J F Marchand
- U Marconi
- C Marin Benito
- M Marinangeli
- P Marino
- J Marks
- G Martellotti
- M Martin
- M Martinelli
- 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
- B Maurin
- A Mazurov
- M McCann
- A McNab
- R McNulty
- B Meadows
- F Meier
- D Melnychuk
- M Merk
- A Merli
- E Michielin
- D A Milanes
- M-N Minard
- D S Mitzel
- A Mogini
- J Molina Rodriguez
- I A Monroy
- S Monteil
- M Morandin
- M J Morello
- O Morgunova
- J Moron
- A B Morris
- A P Morris
- R Mountain
- F Muheim
- M Mulder
- M Mussini
- D Müller
- J Müller
- K Müller
- V Müller
- P Naik
- T Nakada
- R Nandakumar
- A Nandi
- I Nasteva
- M Needham
- N Neri
- S Neubert
- N Neufeld
- M Neuner
- T D Nguyen
- C Nguyen-Mau
- S Nieswand
- R Niet
- N Nikitin
- T Nikodem
- A Nogay
- D P O'Hanlon
- A Oblakowska-Mucha
- V Obraztsov
- S Ogilvy
- R Oldeman
- C J G Onderwater
- A Ossowska
- J M Otalora Goicochea
- P Owen
- A Oyanguren
- P R Pais
- A Palano
- M Palutan
- A Papanestis
- M Pappagallo
چکیده
The first observation of the decays Λ_{b}^{0}→χ_{c1}pK^{-} and Λ_{b}^{0}→χ_{c2}pK^{-} is reported using a data sample corresponding to an integrated luminosity of 3.0 fb^{-1}, collected by the LHCb experiment in pp collisions at center-of-mass energies of 7 and 8 TeV. The following ratios of branching fractions are measured: B(Λ_{b}^{0}→χ_{c1}pK^{-})/B(Λ_{b}^{0}→J/ψpK^{-})=0.242±0.014±0.013±0.009,B(Λ_{b}^{0}→χ_{c2}pK^{-})/B(Λ_{b}^{0}→J/ψpK^{-})=0.248±0.020±0.014±0.009,B(Λ_{b}^{0}→χ_{c2}pK^{-})/B(Λ_{b}^{0}→χ_{c1}pK^{-})=1.02±0.10±0.02±0.05,where the first uncertainty is statistical, the second systematic, and the third due to the uncertainty on the branching fractions of the χ_{c1}→J/ψγ and χ_{c2}→J/ψγ decays. Using both decay modes, the mass of the Λ_{b}^{0} baryon is also measured to be m_{Λ_{b}^{0}}=5619.44±0.28±0.26 MeV/c^{2}, where the first and second uncertainties are statistical and systematic, respectively.
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ورودعنوان ژورنال:
- Physical review letters
دوره 119 6 شماره
صفحات -
تاریخ انتشار 2017