Puzzles of excited charm meson masses

Ananthanarayan, B. ; Banerjee, Sunanda ; Shivaraj, K. ; Upadhyay, A. (2007) Puzzles of excited charm meson masses Physics Letters B: Nuclear Physics and Particle Physics, 651 (2-3). pp. 124-128. ISSN 0370-2693

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Official URL: http://linkinghub.elsevier.com/retrieve/pii/S03702...

Related URL: http://dx.doi.org/10.1016/j.physletb.2007.06.013


We attempt a comprehensive analysis of the low lying charm meson states which present several puzzles, including the poor determination of masses of several non-strange excited mesons. We use the well-determined masses of the ground states and the strange first excited states to 'predict' the mass of the non-strange first excited state in the framework of heavy hadron chiral perturbation theory, an approach that is complementary to the well-known analysis of Mehen and Springer. This approach points to values for the masses of these states that are smaller than the experimental determinations. We provide a critical assessment of these mass measurements and point out the need for new experimental information.

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