The decay width and mass of the D(s1)(2536)(+) meson are measured via the decay channel D(s1)(+) -> D(*+)K(S)(0) using 385 fb(-1) of data recorded with the BABAR detector in the vicinity of the Gamma(4S) resonance at the PEP-II asymmetric-energy electron-positron collider. The result for the decay width is Gamma(D(s1)(+)) = 92 +/- 0.03(stat.) +/- 0.04(syst.) MeV. For the mass, a value of m(D(s1)(+)) = 2535.08 +/- 0.01(stat.) +/- 0.15(syst.) MeV/c(2) is obtained. The mass difference between the D(s1)(+) and the D(*+) is measured to be m(D(s1)(+)) - m(D(*+)) = 524.83 +/- 0.01(stat.) +/- 0.04(syst.) MeV/c(2), representing a significant improvement compared to the current world average. The unnatural spin-parity assignment for the D(s1)(+) meson is confirmed.

Measurement of the mass and width of the D(s1)(2536)(+) meson RID C-5223-2009

BIANCHI, Fabrizio;GAMBA, Diego;PELLICCIONI, Mario;
2011-01-01

Abstract

The decay width and mass of the D(s1)(2536)(+) meson are measured via the decay channel D(s1)(+) -> D(*+)K(S)(0) using 385 fb(-1) of data recorded with the BABAR detector in the vicinity of the Gamma(4S) resonance at the PEP-II asymmetric-energy electron-positron collider. The result for the decay width is Gamma(D(s1)(+)) = 92 +/- 0.03(stat.) +/- 0.04(syst.) MeV. For the mass, a value of m(D(s1)(+)) = 2535.08 +/- 0.01(stat.) +/- 0.15(syst.) MeV/c(2) is obtained. The mass difference between the D(s1)(+) and the D(*+) is measured to be m(D(s1)(+)) - m(D(*+)) = 524.83 +/- 0.01(stat.) +/- 0.04(syst.) MeV/c(2), representing a significant improvement compared to the current world average. The unnatural spin-parity assignment for the D(s1)(+) meson is confirmed.
2011
83
072003
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J. P. Lees;V. Poireau;E. Prencipe;V. Tisserand;J. G. Tico;E. Grauges;M. Martinelli;D. A. Milanes;A. Palano;M. Pappagallo;G. Eigen;B. Stugu...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/91430
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