From the first principles, particles with the same quark content and similar masses should have similar kinematic distributions. Transverse mass scaling may be employed to estimate possible differences in the momentum distribution of such particles. Based on this scaling, the excited bottomonium states measured at the LHC are found to be significantly different from Υ(1S) to the extent that the integrated yield of Υ(2S) is 1.6 times less and Υ(3S) 2.4 times less than would be explained by the mass difference. This contribution explains how the estimate is worked out and relates it to other measurements performed at the LHC.
All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)