Radiative decay width measurements of neutral kaon excitations using the primakoff effect.

نویسندگان

  • A Alavi-Harati
  • T Alexopoulos
  • M Arenton
  • K Arisaka
  • S Averitte
  • R F Barbosa
  • A R Barker
  • M Barrio
  • L Bellantoni
  • A Bellavance
  • J Belz
  • D R Bergman
  • E Blucher
  • G J Bock
  • C Bown
  • S Bright
  • E Cheu
  • S Childress
  • R Coleman
  • M D Corcoran
  • G Corti
  • B Cox
  • A Cunha
  • A R Erwin
  • R Ford
  • A Glazov
  • A Golossanov
  • G Graham
  • J Graham
  • E Halkiadakis
  • J Hamm
  • K Hanagaki
  • S Hidaka
  • Y B Hsiung
  • V Jejer
  • D A Jensen
  • R Kessler
  • H G E Kobrak
  • J LaDue
  • A Lath
  • A Ledovskoy
  • P L McBride
  • D Medvigy
  • P Mikelsons
  • E Monnier
  • T Nakaya
  • K S Nelson
  • H Nguyen
  • V O'Dell
  • R Pordes
  • V Prasad
  • X R Qi
  • B Quinn
  • E J Ramberg
  • R E Ray
  • A Roodman
  • S Schnetzer
  • K Senyo
  • P Shanahan
  • P S Shawhan
  • J Shields
  • W Slater
  • N Solomey
  • S V Somalwar
  • R L Stone
  • E C Swallow
  • S A Taegar
  • R J Tesarek
  • G B Thomson
  • P A Toale
  • A Tripathi
  • R Tschirhart
  • S E Turner
  • Y W Wah
  • J Wang
  • H B White
  • J Whitmore
  • B Winstein
  • R Winston
  • T Yamanaka
  • E D Zimmerman
چکیده

We use K(L)'s in the 100-200 GeV energy range to produce 147 candidate events of the axial vector pair K1(1270)-K1(1400) in the nuclear Coulomb field of a Pb target and determine the radiative widths Gamma(K1(1400)-->K0+gamma)=280.8+/-23.2(stat)+/-40.4(syst) keV and Gamma(K1(1270)-->K0+gamma)=73.2+/-6.1(stat)+/-28.3(syst) keV. These first measurements appear to be lower than the quark-model predictions. We also place upper limits on the radiative widths for K(*)(1410) and K(*)(2)(1430) and find that the latter is vanishingly small in accord with SU(3) invariance in the naive quark model.

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عنوان ژورنال:
  • Physical review letters

دوره 89 7  شماره 

صفحات  -

تاریخ انتشار 2002