Publication

Search for B0→J/ψ decays

Olivier Schneider, Aurelio Bay, Chao Wang, Tagir Aushev, Sun Hee Kim, Xiao Wang, Jing Li
2008
Journal Articles

Résumé

We report a search for the decay B0→J/ψ, using a sample of 657×106 BB̄ pairs collected with the Belle detector at the Υ(4S) resonance. No statistically significant signal is found and an upper limit for the branching fraction is determined to be B(B0→J/ψ)

Source officielle

https://infoscience.epfl.ch/entities/publication/0f7c25f0-073e-4e0a-b461-68ea1fa59c25

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Olivier Schneider, Aurelio Bay, Chao Wang, Tagir Aushev, Sun Hee Kim, Xiao Wang, Jing Li
2008
Journal Articles

Résumé

Source officielle

https://infoscience.epfl.ch/entities/publication/0f7c25f0-073e-4e0a-b461-68ea1fa59c25

À propos de ce résultat

Concepts associés (22)

Méson J/ψ

En physique des particules, le J/ψ (ψ étant la lettre grecque psi) est un méson, une particule composée d'un quark et d'un antiquark. Le J/ψ est un méson sans saveur composé d'un quark charm et d'un antiquark charm. Les mésons composés d'une paire charm-anticharm sont généralement connus sous le terme générique de « charmonium » ; le J/ψ est le premier état excité de charmonium (c'est-à-dire la forme de charmonium possédant la deuxième plus petite masse). Le J/ψ possède une masse de 3 096,9 MeV.

Méson B

In particle physics, B mesons are mesons composed of a bottom antiquark and either an up (_B+), down (_B0), strange (_Strange B0) or charm quark (_Charmed B+). The combination of a bottom antiquark and a top quark is not thought to be possible because of the top quark's short lifetime. The combination of a bottom antiquark and a bottom quark is not a B meson, but rather bottomonium, which is something else entirely. Each B meson has an antiparticle that is composed of a bottom quark and an up (_B-), down (_AntiB0), strange (_Strange antiB0) or charm (_Charmed b-) antiquark respectively.

Quarkonium

In particle physics, quarkonium (from quark and -onium, pl. quarkonia) is a flavorless meson whose constituents are a heavy quark and its own antiquark, making it both a neutral particle and its own antiparticle. The name "quarkonium" is analogous to positronium, the bound state of electron and anti-electron. The particles are short-lived due to matter-antimatter annihilation. Vector meson Light quarks (up, down, and strange) are much less massive than the heavier quarks, and so the physical states actually seen in experiments (η, η′, and π0 mesons) are quantum mechanical mixtures of the light quark states.

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Search for B0→J/ψ decays

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Search for the lepton flavour violating decays B0→e±μ∓ and B0s→e±μ∓ with LHCb Run 2 data

Two-particle Bose-Einstein correlations and their Lévy parameters in PbPb collisions at √sNN=5.02 TeV

Search for Inelastic Dark Matter in Events with Two Displaced Muons and Missing Transverse Momentum in Proton-Proton Collisions at p s=13 TeV