Strong CP, Up-Quark Mass, and the Randall-Sundrum Microscope - High Energy Physics - PhenomenologyReportar como inadecuado




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Abstract: In the Randall-Sundrum model, setting the ratio of up and down quark masses$m u-m d << 1$, relevant to the strong CP problem, does not require chiralsymmetry or fine-tuning, due to exponential bulk fermion profiles. We point outthat such geometric suppression of the mass of a fermion magnifies the massesof its corresponding Kaluza-Klein (KK) states. In this sense, these KK statesact as -microscopes- for probing light quark and lepton masses. In simplerealizations, this hypothesis can be testable at future colliders, like theLHC, by measuring the spectrum of level-1 KK fermions. The microscope can thenprovide an experimental test for the vanishing of $m u$ in the ultraviolet,independently of non-perturbative determinations, by lattice simulations orother means, at hadronic scales. We also briefly comment on application of ourmicroscope idea to other fermions, such as the electron and neutrinos.



Autor: Hooman Davoudiasl, Amarjit Soni

Fuente: https://arxiv.org/







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