Abashian-Booth-Crowe effect in basic double-pionic fusion: a new resonance?

نویسندگان

  • P Adlarson
  • C Adolph
  • W Augustyniak
  • V Baru
  • M Bashkanov
  • T Bednarski
  • F S Bergmann
  • M Berłowski
  • H Bhatt
  • K-T Brinkmann
  • M Büscher
  • H Calén
  • H Clement
  • D Coderre
  • E Czerwiński
  • E Doroshkevich
  • C Ekström
  • R Engels
  • W Erven
  • W Eyrich
  • P Fedorets
  • K Föhl
  • K Fransson
  • F Goldenbaum
  • P Goslawski
  • K Grigoryev
  • V Grishina
  • C-O Gullström
  • J Hampe
  • C Hanhart
  • L Heijkenskjöld
  • V Hejny
  • F Hinterberger
  • M Hodana
  • B Höistad
  • M Jacewicz
  • M Janusz
  • A Jany
  • B R Jany
  • L Jarczyk
  • T Johansson
  • B Kamys
  • G Kemmerling
  • O Khakimova
  • A Khoukaz
  • S Kistryn
  • J Klaja
  • H Kleines
  • B Kłos
  • F Kren
  • W Krzemień
  • P Kulessa
  • S Kullander
  • A Kupść
  • K Lalwani
  • B Lorentz
  • A Magiera
  • R Maier
  • P Marciniewski
  • B Mariański
  • M Mikirtychiants
  • P Moskal
  • H-P Morsch
  • B K Nandi
  • S Niedźwiecki
  • H Ohm
  • A Passfeld
  • C Pauly
  • E Perez del Rio
  • Y Petukhov
  • N Piskunov
  • P Pluciński
  • P Podkopał
  • A Povtoreyko
  • D Prasuhn
  • A Pricking
  • K Pysz
  • T Rausmann
  • C F Redmer
  • J Ritman
  • A Roy
  • R J M Y Ruber
  • Z Rudy
  • S Sawant
  • S Schadmand
  • A Schmidt
  • W Schroeder
  • T Sefzick
  • V Serdyuk
  • N Shah
  • M Siemaszko
  • R Siudak
  • T Skorodko
  • M Skurzok
  • J Smyrski
  • V Sopov
  • R Stassen
  • J Stepaniak
  • G Sterzenbach
  • H Stockhorst
  • H Ströher
  • A Szczurek
  • A Täschner
  • T Tolba
  • A Trzciński
  • R Varma
  • P Vlasov
  • G J Wagner
  • W Węglorz
  • A Winnemöller
  • A Wirzba
  • M Wolke
  • A Wrońska
  • P Wüstner
  • P Wurm
  • X Yuan
  • L Yurev
  • J Zabierowski
  • C Zheng
  • M J Zieliński
  • W Zipper
  • J Złomańczuk
  • P Zuprański
چکیده

We report on an exclusive and kinematically complete high-statistics measurement of the basic double-pionic fusion reaction pn→dπ(0)π(0) over the full energy region of the ABC effect, a pronounced low-mass enhancement in the ππ-invariant mass spectrum. The measurements, which cover also the transition region to the conventional t-channel ΔΔ process, were performed with the upgraded WASA detector setup at COSY. The data reveal the Abashian-Booth-Crowe effect to be uniquely correlated with a Lorentzian energy dependence in the integral cross section. The observables are consistent with a narrow resonance with m=2.37  GeV, Γ≈70  MeV and I(J(P))=0(3(+)) in both pn and ΔΔ systems. Necessary further tests of the resonance interpretation are discussed.

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عنوان ژورنال:
  • Physical review letters

دوره 106 24  شماره 

صفحات  -

تاریخ انتشار 2011