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Publication

A bb(b)over-bar(b)over-bar di-bottomonium at the LHC?

Angelo Esposito
2018
Journal Articles

Abstract

We study the case of a di-bottomonium bb (b) over bar(b) over bar particle at the LHC. Its mass and decay width are obtained within a new model of diquark-antidiquark interactions in tetraquarks. The same model solves several open problems on the phenomenology of the experimentally better known X, Z states. We show that the bb (b) over bar(b) over bar tetraquark is expected approximately 100 MeV below threshold, and compare to a recent analysis by LHCb seeking it in the Y mu mu final state.

Official source

https://infoscience.epfl.ch/entities/publication/6dbd5618-341c-4c49-a706-065276179a83

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Angelo Esposito
2018
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/6dbd5618-341c-4c49-a706-065276179a83

About this result

Related concepts (9)

Quark

A quark (kwɔːrk,_kwɑːrk) is a type of elementary particle and a fundamental constituent of matter. Quarks combine to form composite particles called hadrons, the most stable of which are protons and neutrons, the components of atomic nuclei. All commonly observable matter is composed of up quarks, down quarks and electrons. Owing to a phenomenon known as color confinement, quarks are never found in isolation; they can be found only within hadrons, which include baryons (such as protons and neutrons) and mesons, or in quark–gluon plasmas.

Exotic hadron

Exotic hadrons are subatomic particles composed of quarks and gluons, but which – unlike "well-known" hadrons such as protons, neutrons and mesons – consist of more than three valence quarks. By contrast, "ordinary" hadrons contain just two or three quarks. Hadrons with explicit valence gluon content would also be considered exotic. In theory, there is no limit on the number of quarks in a hadron, as long as the hadron's color charge is white, or color-neutral.

Muon

A muon (ˈmjuːɒn ; from the Greek letter mu (μ) used to represent it) is an elementary particle similar to the electron, with an electric charge of −1 e and a spin of , but with a much greater mass. It is classified as a lepton. As with other leptons, the muon is not thought to be composed of any simpler particles; that is, it is a fundamental particle. The muon is an unstable subatomic particle with a mean lifetime of 2.2μs, much longer than many other subatomic particles.

Related publications (24)

A bb(b)over-bar(b)over-bar di-bottomonium at the LHC?

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