Frontiers in Physics | |
Naturalness of Asymptotically Safe Higgs | |
Strumia, Alessandro1  Pelaggi, Giulio M.3  Vigiani, Elena4  Sannino, Francesco5  | |
[1] di Pisa, Italy;CP3-Origins and Danish IAS, University of Southern Denmark, Denmark;Dipartimento di Fisica dell'INFN, Italy;Università | |
关键词: asymptotic safety; beyond standard model physics; Naturalness; QFT; Fundamental interactions; | |
DOI : 10.3389/fphy.2017.00049 | |
学科分类:物理(综合) | |
来源: Frontiers | |
【 摘 要 】
We extend the list of theories featuring a rigorous interacting ultraviolet fixed point by constructing the first theory featuring a Higgs-like scalar with gauge, Yukawa and quartic interactions. We show that the theory enters a perturbative asymptotically safe regime at energies above a physical scale $\Lambda$. We determine the salient properties of the theory and use it as a concrete example to test whether scalars masses unavoidably receive quantum correction of order $\Lambda$. Having at our dispose a calculable model allowing us to precisely relate the IR and UV of the theory we demonstrate that the scalars can be lighter than $\Lambda$. Although we do not have an answer to whether the Standard Model hypercharge coupling growth towards a Landau pole at around $\Lambda \sim 10^{40}\GeV$ can be tamed by non-perturbative asymptotic safety, our results indicate that such a possibility is worth exploring. In fact, if successful, it might also offer an explanation for the unbearable lightness of the Higgs.
【 授权许可】
CC BY
【 预 览 】
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RO201904024139178ZK.pdf | 1217KB | download |