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Update on angle studies of the X(3872)

Update on angle studies of the X(3872). Preliminary!!!!!. S.K. Choi & S.L. Olsen. Jan 21, 2005 Belle charmonium group video Meeting (Jan 20 in Hawaii). J PC for J ≤ 2. can we just dismiss 1 -- ?. K.Seth hep-ph/0411122: Proposes that the X(37872) is a vector glueball,

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Update on angle studies of the X(3872)

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  1. Update on angle studies of the X(3872) Preliminary!!!!! S.K. Choi & S.L. Olsen Jan 21, 2005 Belle charmonium group video Meeting (Jan 20 in Hawaii)

  2. JPC for J ≤ 2

  3. can we just dismiss 1-- ? K.Seth hep-ph/0411122: Proposes that the X(37872) is a vector glueball, i.e. ggg with small cc mixture. DD decays are not seen because gggcq + cq is small

  4. 1-- 1--: sin2qKm compute angles in J/y restframe qKm K D.V. Bugg hep-ph/0410168v2

  5. data y’: c2/dof = 8.9/9 X: c2/dof = 60.3/9 y’ is 1-- X(3872) is not!

  6. JPC for J ≤ 2

  7. Summary • Thanks to Rosner & Bugg we can learn a lot from ang. distributions with only ~50 events • Rule out 0 -+, 0++ , 1+- and 1-- • 2 - - seems unlikely (c2/dof = 23/9) • 1++ looks good • only non-exotic assignment left with J≤1 • 1++ is favored by molecular models

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