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Probing neutrino Dirac mass in left-right symmetric models at the LHC and next generation colliders

机译:在大型强子对撞机和下一代对撞机的左右对称模型中探测中微子狄拉克质量

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We assess the sensitivity of the LHC, its high energy upgrade, and a prospective 100?TeV hadronic collider to the Dirac Yukawa coupling of the heavy neutrinos in left-right symmetric models (LRSMs). We focus specifically on the trilepton final state in regions of parameter space yielding prompt decays of the right-handed gauge bosons ( W R ) and neutrinos ( N R ). In the minimal LRSM, the Dirac Yukawa couplings are completely fixed in terms of the mass matrices for the heavy and light neutrinos. In this case, the trilepton signal provides a direct probe of the Dirac mass term for a fixed W R and N R mass. We find that while it is possible to discover the W R at the LHC, probing the Dirac Yukawa couplings will require a 100?TeV p p collider. We also show that the observation of the trilepton signal at the LHC would indicate the presence of a nonminimal LRSM scenario.
机译:在左右对称模型(LRSM)中,我们评估了大型强子对撞机的敏感性,其高能升级以及对重中微子的狄拉克·汤河耦合的潜在的100?TeV强子对撞机。我们特别关注参数空间区域中的trilepton最终状态,从而使右手规玻色子(W R)和中微子(N R)迅速衰减。在最小LRSM中,Dirac Yukawa联轴器在重中微子的质量矩阵方面是完全固定的。在这种情况下,三态信号为固定的W R和N R质量提供了狄拉克质量项的直接探测。我们发现,虽然有可能在大型强子对撞机上发现W R,但探测Dirac Yukawa联轴器将需要100?TeV p p对撞机。我们还表明,在大型强子对撞机上对三叶草信号的观察将表明存在非最小LRSM情况。

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