Study of DsJ decays to D+KS0 and D0K+ final states in pp collisions

Abstract

A study of D+KS0 and D0K + final states is performed in a sample of 1.0 fb-1 of pp collision data collected at a centre-of-mass energy of √s = 7TeV with the LHCb detector. We confirm the existence of the Ds1*(2700)+ and DsJ* (2860)+ excited states and measure their masses and widths to be m(Ds1* (2700)+) = 2709:2 ± 1:9(stat) ± 4:5(syst) MeV/c2;Γ(Ds1*(2700)+) = 115:8 ± 7:3(stat) ± 12:1(syst) MeV/c2; m(DsJ*(2860) +) = 2866:1 ± 1:0(stat) ± 6:3(syst) MeV/c2; Γ(DsJ*(2860)+) = 69:9 ± 3:2(stat) ± 6:6(syst) MeV/c2.