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

2. J PC for J ≤ 2 0 - - Violates parity 0 -+ OK (  c ” ) 0 ++ DD allowed 0 +- exotic 1 - - DD allowed 1 -+ exotic 1 ++ OK (  c1 ’ ) 1 +- OK (h c ’ ) 2 - - OK (  2 ) 2 - + OK (  2 ) 2 ++ DDallow’d  c2 ’ ) 2 +- exotic

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 -- : sin 2  K  K compute angles in J/  restframe D.V. Bugg hep-ph/0410168v2

5. data  ’ is 1 -- X(3872) is not!  ’  2 /dof = 8.9/9 X  2 /dof = 60.3/9

6. J PC for J ≤ 2 0 - - Violates parity 0 -+ OK (  c ” ) 0 ++ DD allowed 0 +- exotic 1 - - DD allowed 1 -+ exotic 1 ++ OK (  c1 ’ ) 1 +- OK (h c ’ ) 2 - - OK (  2 ) 2 - + OK (  2 ) 2 ++ DDallow’d  c2 ’ ) 2 +- exotic

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 (  2 /dof = 23/9) 1 ++ looks good –only non-exotic assignment left with J≤1 –1 ++ is favored by molecular models