Determination of the X(3872) meson quantum numbers.
نویسندگان
- R Aaij
- C Abellan Beteta
- B Adeva
- M Adinolfi
- C Adrover
- A Affolder
- Z Ajaltouni
- J Albrecht
- F Alessio
- M Alexander
- S Ali
- G Alkhazov
- P Alvarez Cartelle
- A A Alves
- S Amato
- S Amerio
- Y Amhis
- L Anderlini
- J Anderson
- R Andreassen
- R B Appleby
- O Aquines Gutierrez
- F Archilli
- A Artamonov
- M Artuso
- E Aslanides
- G Auriemma
- S Bachmann
- J J Back
- C Baesso
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- C Barschel
- S Barsuk
- W Barter
- Th Bauer
- A Bay
- J Beddow
- F Bedeschi
- I Bediaga
- S Belogurov
- K Belous
- I Belyaev
- E Ben-Haim
- M Benayoun
- 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
- T J V Bowcock
- E Bowen
- C Bozzi
- T Brambach
- J van den Brand
- J Bressieux
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- T Britton
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- H Brown
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- M Calvo Gomez
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- L Carson
- K Carvalho Akiba
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- Ch Cauet
- M Charles
- Ph Charpentier
- P Chen
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- P E L Clarke
- M Clemencic
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- B Muster
- P Naik
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- M Needham
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- A D Nguyen
- T D Nguyen
- C Nguyen-Mau
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- T Nikodem
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- O Okhrimenko
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- P Owen
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- G N Patrick
- C Patrignani
- C Pavel-Nicorescu
- A Pazos Alvarez
- A Pellegrino
- G Penso
- M Pepe Altarelli
- S Perazzini
- D L Perego
- E Perez Trigo
- A Pérez-Calero Yzquierdo
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- G Pessina
- K Petridis
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- G Punzi
- W Qian
- J H Rademacker
- B Rakotomiaramanana
- M S Rangel
- I Raniuk
- N Rauschmayr
- G Raven
- S Redford
- M M Reid
- A C dos Reis
- S Ricciardi
- A Richards
- K Rinnert
- V Rives Molina
- D A Roa Romero
- P Robbe
- E Rodrigues
- P Rodriguez Perez
- S Roiser
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- A Romero Vidal
- J Rouvinet
- T Ruf
- F Ruffini
- H Ruiz
- P Ruiz Valls
- G Sabatino
- J J Saborido Silva
- N Sagidova
- P Sail
- B Saitta
- C Salzmann
- B Sanmartin Sedes
- M Sannino
- R Santacesaria
- C Santamarina Rios
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- A Sarti
- C Satriano
- A Satta
- M Savrie
- D Savrina
- P Schaack
- M Schiller
- H Schindler
- M Schlupp
- M Schmelling
- B Schmidt
- O Schneider
- A Schopper
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- R Schwemmer
- B Sciascia
- A Sciubba
- M Seco
- A Semennikov
- K Senderowska
- I Sepp
- N Serra
چکیده
The quantum numbers of the X(3872) meson are determined to be J(PC)=1(++) based on angular correlations in B(+)→X(3872)K(+) decays, where X(3872)→π(+)π(-)J/ψ and J/ψ→μ(+)μ(-). The data correspond to 1.0 fb(-1) of pp collisions collected by the LHCb detector. The only alternative assignment allowed by previous measurements J(PC)=2(-+) is rejected with a confidence level equivalent to more than 8 Gaussian standard deviations using a likelihood-ratio test in the full angular phase space. This result favors exotic explanations of the X(3872) state.
منابع مشابه
ar X iv : h ep - p h / 04 10 16 8 v 1 1 2 O ct 2 00 4 The X ( 3872 ) and the 3941 MeV peak in ωJ / Ψ
Belle data for the ππ mass spectrum in X(3872) → π + π − J/Ψ are well fitted by ρ + J/Ψ with J P C = 1 ++ , but are poorly fitted by the ππ S-wave. Formulae for partial wave amplitudes are given for all likely J P C and decay modes of the 3941 MeV peak in ω + J/Ψ. Angular correlations involving up to five angles may allow a spin-parity determination, even with quite low statistics. Special atte...
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If the recently discovered charmonium state X( 3872) is a loosely bound S-wave molecule of the charm mesons D0 D(*0) or D(*0) D0, it can be produced in B-meson decay by the coalescence of charm mesons. If this coalescence mechanism dominates, the ratio of the differential rate for B+ -->D(0) D(* 0)K+ near the D0 D(*0) threshold and the rate for B+ -->XK+ is a function of the D0 D(*0) invariant ...
متن کاملar X iv : h ep - p h / 04 10 16 8 v 3 2 1 O ct 2 00 4 The X ( 3872 ) and the 3941 MeV peak in ωJ / Ψ
Belle data for the ππ mass spectrum in X(3872) → π + π − J/Ψ are well fitted by ρ + J/Ψ with J P C = 1 ++ , but are poorly fitted by the ππ S-wave. Formulae for partial wave amplitudes are given for all likely J P C and decay modes of the 3941 MeV peak in ω + J/Ψ. Angular correlations involving up to five angles may allow a spin-parity determination, even with quite low statistics. Special atte...
متن کاملThe X ( 3872 ) and the 3941 MeV peak in ωJ / Ψ
Belle data for the ππ mass spectrum in X(3872) → π + π − J/Ψ are well fitted by ρ + J/Ψ with J P C = 1 ++ , but are poorly fitted by the ππ S-wave. Formulae for partial wave amplitudes are given for all likely J P C and decay modes of the 3941 MeV peak in ω + J/Ψ. Angular correlations involving up to five angles may allow a spin-parity determination, even with quite low statistics. Special atte...
متن کاملX ( 3872 ) and Y ( 4140 ) using diquark - antidiquark operators with lattice QCD
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متن کاملar X iv : h ep - p h / 04 10 16 8 v 4 1 7 Ja n 20 05 The X ( 3872 ) and the 3941 MeV peak in ωJ
Belle data for the ππ mass spectrum in X(3872) → π + π − J/Ψ are well fitted by ρ + J/Ψ with J P C = 1 ++ , but are poorly fitted by the ππ S-wave. This rules out quantum numbers 1 +− , 2 −− and 3 −−. Formulae for partial wave amplitudes are given for all likely J P C and decay modes of the 3941 MeV peak which Belle observe in ω + J/Ψ. Angular correlations involving up to five angles may allow ...
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ورودعنوان ژورنال:
- Physical review letters
دوره 110 22 شماره
صفحات -
تاریخ انتشار 2013