Tetraquarks composed of 4 heavy quarks

TL;DR

This paper investigates the masses and potential observability of tetraquarks composed of four heavy quarks at the LHC, using nonrelativistic quantum mechanics to predict their properties and decay channels.

Contribution

It provides theoretical mass calculations for heavy tetraquarks and assesses their detectability in specific LHC decay channels, highlighting the possibility of observing these states as peaks in invariant mass distributions.

Findings

Masses of certain tetraquarks are high enough for detection as peaks in invariant mass spectra.

T_{4c} and T_{2[bc]} tetraquarks can be observed in specific decay channels.

T_{4b} tetraquark is below the decay threshold for certain channels.

Abstract

In the current work spectroscopy and possibility of observation at the LHC of tetraquarks composed of 4 heavy quarks is discussed. Tetraquarks concerned are T_{4c}=[cc][cc]$, T_{4b}=[bb][bb] and T_{2[bc]}=[bc][bc]. By solving nonrelativistic Schroedinger equation masses of these states are found with the hyperfine splitting accounted for. It is shown that masses of tensor tetraquarks T_{4c}(2++) and T_{2[bc]}(2++) are high enough to observe these states as peaks in the invariant mass distributions of heavy quarkonia pairs in pp -> T_{4c}+X -> 2J/\psi+X, pp -> T_{2[bc]}+X -> 2B_{c}+X and pp -> T_{2[bc]}+X -> J/\psi\Upsilon(1S)+X channels while T_{4b} is under the threshold of decay into a vector bottomonia pair.