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oai:recercat.cat:2445/1317522025-12-05T16:47:15Zcom_2072_1057col_2072_478823col_2072_478917

Measurement of the mass and width of the Ds1(2536)+ meson Garra Ticó, Jordi Graugés Pous, Eugeni BABAR Collaboration Física de partícules Experiments Particle physics Experiments The decay width and mass of the D s 1 ( 2536 ) + meson are measured via the decay channel D + s 1 → D * + K 0 S using 385     fb − 1 of data recorded with the BABAR detector in the vicinity of the Υ ( 4 S ) resonance at the PEP-II asymmetric-energy electron-positron collider. The result for the decay width is Γ ( D + s 1 ) = 0.92 ± 0.03 ( stat . ) ± 0.04 ( syst . )     MeV . For the mass, a value of m ( D + s 1 ) = 2535.08 ± 0.01 ( stat . ) ± 0.15 ( syst . )     MeV / c 2 is obtained. The mass difference between the D + s 1 and the D * + is measured to be m ( D + s 1 ) − 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 + s 1 meson is confirmed. 2019-04-08T10:39:33Z 2019-04-08T10:39:33Z 2011-04-19 2019-04-08T10:39:33Z info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 1550-7998 https://hdl.handle.net/2445/131752 602007 eng Reproducció del document publicat a: https://doi.org/10.1103/PhysRevD.83.072003 Physical Review D, 2011, vol. 83, num. 7, p. 072003 https://doi.org/10.1103/PhysRevD.83.072003 (c) American Physical Society, 2011 info:eu-repo/semantics/openAccess 14 p. application/pdf American Physical Society Articles publicats en revistes (Física Quàntica i Astrofísica)