Charmonium options for the X(3872)
Abstract
In this paper we consider all possible 1D and 2P cc̄ assignments for the recently discovered X(3872). Taking the experimental mass as input, we give numerical results for the E1 radiative widths as well as the three principal types of strong decays; opencharm, cc̄ annihilation and closedcharm hadronic transitions. We find that many assignments may be immediately eliminated due to the small observed total width. The remaining viable cc̄ assignments are 1 ^{3}D_{3}, 1 ^{3}D_{2}, 1 ^{1}D_{2}, 2 ^{3}P_{1} and 2 ^{1}P_{1}. A search for the mode J/ψπ^{0}π^{0} can establish the C parity of the X(3872), which will eliminate many of these possibilities. Radiative transitions can then be used to test the remaining assignments, as they populate characteristic final states. The 1 ^{3}D_{2} and 1 ^{1}D_{2} states are predicted to have large (ca. 50%) radiative branching fractions to χ_{c1}γ and h_{c}γ, respectively. We predict that the 1 ^{3}D_{3} will also be relatively narrow and will have a significant (ca. 10%) branching fraction to χ_{c2}γ, and should also be observable in B decay. Tests for noncc̄ X(3872) assignments are also discussed.
 Publication:

Physical Review D
 Pub Date:
 March 2004
 DOI:
 10.1103/PhysRevD.69.054008
 arXiv:
 arXiv:hepph/0311162
 Bibcode:
 2004PhRvD..69e4008B
 Keywords:

 12.39.x;
 13.20.Gd;
 13.25.Gv;
 14.40.Gx;
 Phenomenological quark models;
 Decays of J/psi Upsilon and other quarkonia;
 Mesons with S=C=B=0 mass>2.5 GeV;
 High Energy Physics  Phenomenology
 EPrint:
 11 pages, 5 tables. typos corrected, references and discussion added