Precision measurement of the mass and lifetime of the Ξb⁻ baryon.

نویسندگان

  • R Aaij
  • B Adeva
  • M Adinolfi
  • A Affolder
  • 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
  • J Anderson
  • R Andreassen
  • M Andreotti
  • J E Andrews
  • R B Appleby
  • O Aquines Gutierrez
  • F Archilli
  • A Artamonov
  • M Artuso
  • E Aslanides
  • G Auriemma
  • M Baalouch
  • S Bachmann
  • J J Back
  • A Badalov
  • C Baesso
  • W Baldini
  • R J Barlow
  • C Barschel
  • S Barsuk
  • W Barter
  • V Batozskaya
  • V Battista
  • A Bay
  • L Beaucourt
  • J Beddow
  • F Bedeschi
  • I Bediaga
  • S Belogurov
  • K Belous
  • I Belyaev
  • E Ben-Haim
  • G Bencivenni
  • S Benson
  • J Benton
  • A Berezhnoy
  • R Bernet
  • M-O Bettler
  • M van Beuzekom
  • A Bien
  • S Bifani
  • T Bird
  • A Bizzeti
  • P M Bjørnstad
  • T Blake
  • F Blanc
  • J Blouw
  • S Blusk
  • V Bocci
  • A Bondar
  • N Bondar
  • W Bonivento
  • S Borghi
  • A Borgia
  • M Borsato
  • T J V Bowcock
  • E Bowen
  • C Bozzi
  • T Brambach
  • D Brett
  • M Britsch
  • T Britton
  • J Brodzicka
  • N H Brook
  • H Brown
  • A Bursche
  • J Buytaert
  • S Cadeddu
  • R Calabrese
  • M Calvi
  • M Calvo Gomez
  • P Campana
  • D Campora Perez
  • A Carbone
  • G Carboni
  • R Cardinale
  • A Cardini
  • L Carson
  • K Carvalho Akiba
  • G Casse
  • L Cassina
  • L Castillo Garcia
  • M Cattaneo
  • Ch Cauet
  • R Cenci
  • M Charles
  • Ph Charpentier
  • M Chefdeville
  • S Chen
  • S-F Cheung
  • N Chiapolini
  • M Chrzaszcz
  • 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
  • G Collazuol
  • P Collins
  • A Comerma-Montells
  • A Contu
  • A Cook
  • M Coombes
  • S Coquereau
  • G Corti
  • M Corvo
  • I Counts
  • B Couturier
  • G A Cowan
  • D C Craik
  • M Cruz Torres
  • S Cunliffe
  • R Currie
  • C D'Ambrosio
  • J Dalseno
  • P David
  • P N Y David
  • A Davis
  • K De Bruyn
  • S De Capua
  • M De Cian
  • J M De Miranda
  • L De Paula
  • W De Silva
  • P De Simone
  • C-T Dean
  • D Decamp
  • M Deckenhoff
  • L Del Buono
  • N Déléage
  • D Derkach
  • O Deschamps
  • F Dettori
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  • H Dijkstra
  • S Donleavy
  • F Dordei
  • M Dorigo
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  • K Dreimanis
  • G Dujany
  • F Dupertuis
  • P Durante
  • R Dzhelyadin
  • A Dziurda
  • A Dzyuba
  • S Easo
  • U Egede
  • V Egorychev
  • S Eidelman
  • S Eisenhardt
  • U Eitschberger
  • R Ekelhof
  • L Eklund
  • I El Rifai
  • Ch Elsasser
  • S Ely
  • S Esen
  • H-M Evans
  • T Evans
  • A Falabella
  • C Färber
  • C Farinelli
  • N Farley
  • S Farry
  • R F Fay
  • D Ferguson
  • V Fernandez Albor
  • F Ferreira Rodrigues
  • M Ferro-Luzzi
  • S Filippov
  • M Fiore
  • M Fiorini
  • M Firlej
  • C Fitzpatrick
  • T Fiutowski
  • P Fol
  • M Fontana
  • F Fontanelli
  • R Forty
  • O Francisco
  • M Frank
  • C Frei
  • M Frosini
  • J Fu
  • E Furfaro
  • A Gallas Torreira
  • D Galli
  • S Gallorini
  • S Gambetta
  • M Gandelman
  • P Gandini
  • Y Gao
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  • J Garofoli
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  • D Gascon
  • C Gaspar
  • R Gauld
  • L Gavardi
  • A Geraci
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  • T Gershon
  • Ph Ghez
  • A Gianelle
  • S Gianì
  • V Gibson
  • L Giubega
  • V V Gligorov
  • C Göbel
  • D Golubkov
  • A Golutvin
  • A Gomes
  • C Gotti
  • M Grabalosa Gándara
  • R Graciani Diaz
  • L A Granado Cardoso
  • E Graugés
  • E Graverini
  • G Graziani
  • A Grecu
  • E Greening
  • S Gregson
  • P Griffith
  • L Grillo
  • O Grünberg
  • B Gui
  • E Gushchin
  • Yu Guz
  • T Gys
  • C Hadjivasiliou
  • G Haefeli
  • C Haen
  • S C Haines
  • S Hall
  • B Hamilton
  • T Hampson
  • X Han
  • S Hansmann-Menzemer
  • N Harnew
  • S T Harnew
  • J Harrison
  • J He
  • T Head
  • V Heijne
  • K Hennessy
  • P Henrard
  • L Henry
  • J A Hernando Morata
  • E van Herwijnen
  • M Heß
  • A Hicheur
  • D Hill
  • M Hoballah
  • C Hombach
  • W Hulsbergen
  • P Hunt
  • N Hussain
  • D Hutchcroft
  • D Hynds
  • M Idzik
  • P Ilten
  • R Jacobsson
  • A Jaeger
  • J Jalocha
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  • P Jaton
  • A Jawahery
  • F Jing
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  • D Johnson
  • C R Jones
  • C Joram
  • B Jost
  • N Jurik
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  • M Karacson
  • T M Karbach
  • S Karodia
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  • C Khurewathanakul
  • S Klaver
  • K Klimaszewski
  • O Kochebina
  • M Kolpin
  • I Komarov
  • R F Koopman
  • P Koppenburg
  • M Korolev
  • A Kozlinskiy
  • L Kravchuk
  • K Kreplin
  • M Kreps
  • G Krocker
  • P Krokovny
  • F Kruse
  • W Kucewicz
  • M Kucharczyk
  • V Kudryavtsev
  • K Kurek
  • T Kvaratskheliya
  • V N La Thi
  • D Lacarrere
  • G Lafferty
  • A Lai
  • D Lambert
  • R W Lambert
  • G Lanfranchi
  • C Langenbruch
  • B Langhans
  • T Latham
  • C Lazzeroni
  • R Le Gac
  • J van Leerdam
  • J-P Lees
  • R Lefèvre
  • A Leflat
  • J Lefrançois
  • S Leo
  • O Leroy
  • T Lesiak
  • B Leverington
  • Y Li
  • T Likhomanenko
  • M Liles
  • R Lindner
  • C Linn
  • F Lionetto
  • B Liu
  • S Lohn
  • I Longstaff
  • J H Lopes
  • N Lopez-March
  • P Lowdon
  • D Lucchesi
  • H Luo
  • A Lupato
  • E Luppi
  • O Lupton
  • F Machefert
  • I V Machikhiliyan
  • F Maciuc
  • O Maev
  • S Malde
  • A Malinin
  • G Manca
  • G Mancinelli
  • A Mapelli
  • J Maratas
  • J F Marchand
  • U Marconi
  • C Marin Benito
  • P Marino
  • R Märki
  • J Marks
  • G Martellotti
  • A Martín Sánchez
  • M Martinelli
  • D Martinez Santos
  • F Martinez Vidal
  • D Martins Tostes
  • A Massafferri
  • R Matev
  • Z Mathe
  • C Matteuzzi
  • B Maurin
  • A Mazurov
  • M McCann
  • J McCarthy
  • A McNab
  • R McNulty
  • B McSkelly
  • B Meadows
  • F Meier
  • M Meissner
  • M Merk
  • D A Milanes
  • M-N Minard
  • N Moggi
  • J Molina Rodriguez
  • S Monteil
  • M Morandin
  • P Morawski
  • A Mordà
  • M J Morello
  • J Moron
  • A-B Morris
  • R Mountain
  • F Muheim
  • K Müller
  • M Mussini
  • B Muster
  • P Naik
  • T Nakada
  • R Nandakumar
  • I Nasteva
  • M Needham
  • N Neri
  • S Neubert
  • N Neufeld
  • M Neuner
  • A D Nguyen
  • T D Nguyen
  • C Nguyen-Mau
  • M Nicol
  • V Niess
  • R Niet
  • N Nikitin
  • T Nikodem
  • A Novoselov
  • D P O'Hanlon
  • A Oblakowska-Mucha
  • V Obraztsov
  • S Oggero
  • S Ogilvy
  • O Okhrimenko
  • R Oldeman
  • C J G Onderwater
  • M Orlandea
  • J M Otalora Goicochea
  • A Otto
  • P Owen
  • A Oyanguren
  • B K Pal
  • A Palano
  • F Palombo
  • M Palutan
  • J Panman
  • A Papanestis
  • M Pappagallo
  • L L Pappalardo
  • C Parkes
  • C J Parkinson
  • G Passaleva
  • G D Patel
  • M Patel
  • C Patrignani
  • A Pearce
  • A Pellegrino
  • M Pepe Altarelli
  • S Perazzini
  • P Perret
  • M Perrin-Terrin
  • L Pescatore
  • E Pesen
  • K Petridis
  • A Petrolini
  • E Picatoste Olloqui
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  • T Pilař
  • D Pinci
  • A Pistone
  • S Playfer
  • M Plo Casasus
  • F Polci
  • A Poluektov
  • E Polycarpo
  • A Popov
  • D Popov
  • B Popovici
  • C Potterat
  • E Price
  • J D Price
  • J Prisciandaro
  • A Pritchard
  • C Prouve
  • V Pugatch
  • A Puig Navarro
چکیده

We report on measurements of the mass and lifetime of the Ξ(b)⁻ baryon using about 1800 Ξ(b)⁻ decays reconstructed in a proton-proton collision data set corresponding to an integrated luminosity of 3.0  fb⁻¹ collected by the LHCb experiment. The decays are reconstructed in the Ξ(b)⁻→Ξ(c)⁰π⁻, Ξ(c)⁰→pK⁻K⁻π⁺ channel and the mass and lifetime are measured using the Λ(b)⁰→Λ(c)⁺π⁻ mode as a reference. We measure M(Ξ(b)⁻)-M(Λ(b)⁰)=178.36±0.46±0.16  MeV/c², (τ(Ξ(b)⁻)/τ(Λ(b)⁰)=1.089±0.026±0.011, where the uncertainties are statistical and systematic, respectively. These results lead to a factor of 2 better precision on the Ξ(b)⁻ mass and lifetime compared to previous best measurements, and are consistent with theoretical expectations.

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عنوان ژورنال:
  • Physical review letters

دوره 113 24  شماره 

صفحات  -

تاریخ انتشار 2014