Decay properties of b-hadrons with the ATLAS experiment

Leonid Gladilin
2016 Nuclear and Particle Physics Proceedings  
Recent results of the ATLAS experiment at LHC on decay properties of b-hadrons are reviewed. The timedependent CP asymmetry parameters have been measured in B 0 s → J/ψφ decays using flavour tagging. The parityviolating decay asymmetry parameter α b and the helicity amplitudes have been measured for the decay Λ 0 b → J/ψΛ 0 . The branching fraction B(B + → χ c1 K + ) has been measured with χ c1 reconstruction in the decay χ c1 → J/ψγ. An excited B ± c state has been observed through its decays
more » ... o the ground B ± c state and two oppositely charged pions. The mass and decay of this state are consistent with expectations for the second S -wave state of the B ± c meson, B ± c (2S ).
doi:10.1016/j.nuclphysbps.2015.09.227 fatcat:zmpgydylejfyxgp7ld6eyc2hdy