Possible experimental signatures of stable double beauty tetraquarks

TL;DR

This paper proposes a novel experimental approach to detect stable double beauty tetraquarks through their unique decay signatures involving displaced vertices and specific final states, enhancing detection prospects.

Contribution

It introduces a new method for searching for stable double beauty tetraquarks, focusing on their mixing and decay signatures in high-energy collisions.

Findings

Proposes a clean experimental signature involving displaced vertices and specific decay channels.

Suggests the possibility of detecting other double heavy tetraquarks through similar mixing mechanisms.

Highlights the high efficiency and background separation capability of the proposed detection method.

Abstract

A new method is proposed to search for the double beauty tetraquark $bb\bar{u}\bar{d}$ with a mass below the $BB$ threshold. The $b\bar{d}-\bar{b}d$ mixing can result in evolution of the tetraquark content to $b\bar{b}\bar{u}d$ with the following strong decay into the $\Upsilon$(1S)$\pi^-$ and $\Upsilon$(2S)$\pi^-$ final states in a secondary vertex displaced from the primary $pp$ collision vertex. This experimental signature is clean, has a high selection efficiency and can be well separated from backgrounds. Experimental signatures for searches for other double heavy tetraquarks are also discussed, suggesting the possibility of the $b\bar{d}$ or $b\bar{s}$ mixing.