Khachatryan, V., Sirunyan, A.M., Tumasyan, A., Albayrak, E.A., Gülmez, E., Kaya, M., Kaya, O., Yetkin, T., et.al., "Measurement of the Production Cross Section Ratio Sigma(Chi B2(1P))/Sigma(Chi B1(1P)) in Pp Collisions at Root S=8tev", Physics Letters B, 743, 383-402, 2015.