"Cross-section limits - $M(X)/M(Y) = 0.13$" of "Search for resonant and nonresonant production of pairs of dijet resonances in proton-proton collisions at $\sqrt{s}$ = 13 TeV"

The observed 95% CL upper limits on the product of the cross section, branching fraction, and acceptance for resonant production of paired dijet resonances decaying to a quark-gluon pair, with $M(X)/M(Y) = 0.13$. The corresponding expected limits and their variations at the 1 and 2 standard deviation levels are also shown. Limits are compared to predictions for a scalar diquark with couplings to pairs of up quarks, $y_{uu}$ = 0.4, and to pairs of vector-like quarks, $y_{χ}$ = 0.6.

本数据集给出了衰变至夸克-胶子对的成对双喷注共振态的共振产生过程中，截面、分支比与接收度的乘积的观测95%置信度上限，其中质量比$M(X)/M(Y) = 0.13$。同时一并展示了对应的预期极限及其在1倍、2倍标准偏差下的涨落情况。将上述极限与两类理论预言进行对比：一类是与上夸克对耦合（耦合常数$y_{uu}$ = 0.4）的标量双夸克，另一类是与类矢量夸克对耦合（耦合常数$y_{χ}$ = 0.6）的模型。