English

Flavor anomalies from asymptotically safe gravity

High Energy Physics - Phenomenology 2021-05-13 v2

Abstract

We use the framework of asymptotically safe quantum gravity to derive predictions for scalar leptoquark solutions to the bsb \to s and bcb\to c flavor anomalies. The presence of an interactive UV fixed point in the system of gauge and Yukawa couplings imposes a set of boundary conditions at the Planck scale, which allows one to determine low-energy values of the leptoquark Yukawa matrix elements. As a consequence, the allowed leptoquark mass range can be significantly narrowed down. We find that a consistent gravity-driven solution to the bsb\to s anomalies predicts a leptoquark with the mass of 4-7 TeV, entirely within the reach of a future hadron-hadron collider with s=100\sqrt{s}=100 TeV. Conversely, in the case of the bcb\to c anomalies the asymptotically safe gravity framework predicts a leptoquark mass at the edge of the current LHC bounds. Complementary signatures appear in flavor observables, namely the (semi)leptonic decays of B and D mesons and kaons.

Keywords

Cite

@article{arxiv.2007.03567,
  title  = {Flavor anomalies from asymptotically safe gravity},
  author = {Kamila Kowalska and Enrico Maria Sessolo and Yasuhiro Yamamoto},
  journal= {arXiv preprint arXiv:2007.03567},
  year   = {2021}
}

Comments

39 pages, 6 figures. Added discussion of a trans-Planckian IR fixed point in Section 3.1. Added scenarios of type FPc, corresponding to Gaussian fixed points of the NP couplings. References added

R2 v1 2026-06-23T16:55:26.146Z