First measurement of the charge asymmetry in beauty-quark pair production.
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
- V Balagura
- 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
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- A Bondar
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- H Carranza-Mejia
- L Carson
- K Carvalho Akiba
- G Casse
- L Cassina
- L Castillo Garcia
- M Cattaneo
- Ch Cauet
- R Cenci
- M Charles
- Ph Charpentier
- S Chen
- S-F Cheung
- N Chiapolini
- M Chrzaszcz
- K Ciba
- X Cid Vidal
- G Ciezarek
- P E L Clarke
- M Clemencic
- H V Cliff
- J Closier
- V Coco
- J Cogan
- E Cogneras
- 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
- D Decamp
- M Deckenhoff
- L Del Buono
- N Déléage
- D Derkach
- O Deschamps
- F Dettori
- A Di Canto
- H Dijkstra
- S Donleavy
- F Dordei
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- A Dosil Suárez
- D Dossett
- A Dovbnya
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- G Dujany
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- 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
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- H-M Evans
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- A Falabella
- C Färber
- C Farinelli
- N Farley
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- F Ferreira Rodrigues
- M Ferro-Luzzi
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- C Fitzpatrick
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- O Francisco
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- E Gersabeck
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- C Göbel
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- L A Granado Cardoso
- E Graugés
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- A Grecu
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- S Gregson
- P Griffith
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- O Grünberg
- B Gui
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- Yu Guz
- T Gys
- C Hadjivasiliou
- G Haefeli
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- B Hamilton
- T Hampson
- X Han
- S Hansmann-Menzemer
- N Harnew
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- J Harrison
- J He
- T Head
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- E van Herwijnen
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- C Joram
- B Jost
- N Jurik
- M Kaballo
- S Kandybei
- W Kanso
- M Karacson
- T M Karbach
- S Karodia
- M Kelsey
- I R Kenyon
- T Ketel
- B Khanji
- 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
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- F Kruse
- W Kucewicz
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- V Kudryavtsev
- K Kurek
- T Kvaratskheliya
- V N La Thi
- D Lacarrere
- G Lafferty
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- G Lanfranchi
- C Langenbruch
- B Langhans
- T Latham
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- 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
- M Liles
- R Lindner
- C Linn
- F Lionetto
- B Liu
- G Liu
- S Lohn
- I Longstaff
- J H Lopes
- N Lopez-March
- P Lowdon
- H Lu
- D Lucchesi
- H Luo
- A Lupato
- E Luppi
- O Lupton
- F Machefert
- I V Machikhiliyan
- F Maciuc
- O Maev
- S Malde
- G Manca
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- J Maratas
- J F Marchand
- U Marconi
- C Marin Benito
- P Marino
- R Märki
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- G Martellotti
- A Martens
- A Martín Sánchez
- M Martinelli
- D Martinez Santos
- F Martinez Vidal
- D Martins Tostes
- A Massafferri
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- Z Mathe
- C Matteuzzi
- A Mazurov
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- A McNab
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- B McSkelly
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- 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
- R Muresan
- 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
- G Onderwater
- M Orlandea
- J M Otalora Goicochea
- P Owen
- A Oyanguren
- B K Pal
- A Palano
- F Palombo
- M Palutan
- J Panman
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- C Parkes
- C J Parkinson
- G Passaleva
- G D Patel
- M Patel
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- A Pazos Alvarez
- A Pearce
- A Pellegrino
- M Pepe Altarelli
- S Perazzini
- E Perez Trigo
- P Perret
- M Perrin-Terrin
- L Pescatore
- E Pesen
- K Petridis
- A Petrolini
- E Picatoste Olloqui
- B Pietrzyk
- T Pilař
- D Pinci
- A Pistone
- S Playfer
- M Plo Casasus
- F Polci
- A Poluektov
- E Polycarpo
- A Popov
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- C Potterat
- E Price
- J Prisciandaro
- A Pritchard
- C Prouve
- V Pugatch
- A Puig Navarro
چکیده
The difference in the angular distributions between beauty quarks and antiquarks, referred to as the charge asymmetry, is measured for the first time in bb pair production at a hadron collider. The data used correspond to an integrated luminosity of 1.0 fb(-1) collected at 7 TeV center-of-mass energy in proton-proton collisions with the LHCb detector. The measurement is performed in three regions of the invariant mass of the bb system. The results obtained are A(C)(bb))(40 105 GeV/c(2)) = 1.6 ± 1.7 ± 0.6%, where A(C)(bb)) is defined as the asymmetry in the difference in rapidity between jets formed from the beauty quark and antiquark, where in each case the first uncertainty is statistical and the second systematic. The beauty jets are required to satisfy 2 < η < 4, E(T) >20 GeV, and have an opening angle in the transverse plane Δ ϕ > 2.6 rad. These measurements are consistent with the predictions of the standard model.
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ورودعنوان ژورنال:
- Physical review letters
دوره 113 8 شماره
صفحات -
تاریخ انتشار 2014