Distributions sensitive to the underlying event are studied in events containing one or more charged particles. Jets are reconstructed using the anti-$k_t$ algorithm with radius parameter $R$ varying between 0.2 and 1.0. Distributions of the charged-particle multiplicity, the scalar sum of the transverse momentum of charged particles, and the average charged-particle pT are measured as functions of $p_\perp^\text{jet}$ in regions transverse to and opposite the leading jet for $4 \text{GeV} < p_\perp^\text{jet} < 100 \text{GeV}$. In addition, the $R$-dependence of the mean values of these observables is studied.
Generated at Thursday, 12. December 2019 02:35PM