Solving the Naturalness Problem by Baby Universes in the Lorentzian Multiverse

TL;DR

This paper presents a multiverse wavefunction approach incorporating wormholes to address the naturalness problem, predicting a small cosmological constant and specific Higgs mass without relying on anthropic reasoning.

Contribution

It introduces a novel framework using microscopic wormholes in the multiverse wavefunction to fix coupling constants and solve naturalness issues.

Findings

Cosmological constant is predicted to be extremely small in the far future.

Higgs mass is predicted to be 140±20 GeV.

The strong CP problem is addressed within this framework.

Abstract

We propose a solution of the naturalness problem in the context of the multiverse wavefunction without the anthropic argument. If we include microscopic wormhole configurations in the path integral, the wave function becomes a superposition of universes with various values of the coupling constants such as the cosmological constant, the parameters in the Higgs potential, and so on. We analyze the quantum state of the multiverse, and evaluate the density matrix of one universe. We show that the coupling constants induced by the wormholes are fixed in such a way that the density matrix is maximized. In particular, the cosmological constant, which is in general time-dependent, is chosen such that it takes an extremely small value in the far future. We also discuss the gauge hierarchy problem and the strong CP problem in this context. Our study predicts that the Higgs mass is 140\pm20 GeV and {\theta}=0.