标题： 强子对撞机上激发夸克的发现质量范围 显示英文标题

标题： Discovery Mass Reach for Excited Quarks at Hadron Colliders

摘要： 如果夸克是复合粒子，则预期存在激发态。我们估算了在费米实验室的Tevatron、大型强子对撞机（LHC）以及一个超大强子对撞机（VLHC）上，由激发夸克衰变到二喷注时的发现质量范围与积分亮度的关系。在Tevatron，运行II期（积分亮度为2 fb^-1）的质量范围可达0.94 TeV，而TeV33（积分亮度为30 fb^-1）可达1.1 TeV。在LHC上，积分亮度为100 fb^-1时，质量范围可达6.3 TeV。在VLHC中质心能量sqrt(s)为50 TeV（200 TeV）的情况下，积分亮度为10^4 fb^-1时，质量范围可达25 TeV（78 TeV）。然而，一个质量为25 TeV的激发夸克将在sqrt(s)=100 TeV的强子对撞机上，积分亮度为13 fb^-1时被发现，这说明了一个物理实例：机器能量提高一倍相当于积分亮度提高了1000倍。 显示英文摘要

摘要： If quarks are composite particles then excited states are expected. We estimate the discovery mass reach as a function of integrated luminosity for excited quarks decaying to dijets at the Tevatron, LHC, and a Very Large Hadron Collider (VLHC). At the Tevatron the mass reach is 0.94 TeV for Run II (2 fb^-1) and 1.1 TeV for TeV33 (30 fb^-1). At the LHC the mass reach is 6.3 TeV for 100 fb^-1. At a VLHC with a center of mass energy, sqrt(s), of 50 TeV (200 TeV) the mass reach is 25 TeV (78 TeV) for an integrated luminosity of 10^4 fb^-1. However, an excited quark with a mass of 25 TeV would be discovered at a hadron collider with sqrt(s)=100 TeV and an integrated luminosity of 13 fb^-1, illustrating a physics example where a factor of 2 in machine energy is worth a factor of 1000 in luminosity.