Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
2011-03-14
Phys.Rev.D83:072003,2011
Physics
High Energy Physics
High Energy Physics - Experiment
14 pages, 26 postscript figures, submitted to Phys. Rev. D
Scientific paper
10.1103/PhysRevD.83.072003
The decay width and mass of the Ds1(2536)+ meson are measured via the decay channel Ds1+ -> D*+KS0 using 385 fb^-1 of data recorded with the BABAR detector in the vicinity of the Y(4S) resonance at the PEP-II asymmetric-energy electron-positron collider. The result for the decay width is 0.92 +- 0.03 (stat) +- 0.04 (syst) MeV. For the mass, a value of 2535.08 +- 0.01 +- 0.15 MeV/c^2 is obtained. The mass difference between the Ds1+ and the D*+ is measured to be 524.83 +- 0.01 +- 0.04 MeV/c^2, representing a significant improvement compared to the current world average. The unnatural spin-parity assignment for the Ds1+ meson is confirmed.
"The BABAR Collaboration
Lees Jean-Pierre
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