E-viri
PDF
Recenzirano
-
Dunwoodie, W.; Ziegler, V.
Physical review letters, 02/2008, Letnik: 100, Številka: 6Journal Article
We propose a simple explanation for the increase of approximately 3 MeV/c{sup 2} in the mass value of the X(3872) obtained from D*{sup 0}D{sup 0} decay relative to that obtained from decay to J/{psi}{pi}{sup +}{pi}{sup -}. If the total width of the X(3872) is 2-3 MeV, the peak position in the D*{sup 0}D{sup 0} invariant mass distribution is sensitive to the final state orbital angular momentum because of the proximity of the X(3872) to D*{sup 0}D{sup 0} threshold. We show that for total width 3 MeV and one unit of orbital angular momentum, a mass shift {approx}3 MeV/c{sup 2} is obtained; experimental mass resolution should slightly increase this value. A consequence is that spin-parity 2{sup -} is favored for the X(3872)
