Measurements of $B \rightarrow J/\psi$ at forward rapidity in $p$$+$$p$ collisions at $\sqrt{s}=510$ GeV

We report the first measurement of the fraction of $ J/\ psi$ mesonscoming from $ B$- mesondecay ($F_{B{\rightarrow}J/\psi}$) in $p$+$p$ collisions at $\sqrt{s}=$ 510 GeV. The measurement is performed using the forward silicon vertex detector and central vertex detector at PHENIX, which provide precise tracking and distance-of-closest-approach determinations, enabling the statistical separation of $J/\psi$ due to $ B$- mesondecays from prompt $J/\psi$. The measured value of $F_{B{\rightarrow}J/\psi}$ is 8.1\%$\pm$2.3\% (stat)$\pm$1.9\% (syst) for $J/\psi$ with transverse momenta $0

Keywords:

• Hadron
• Nuclear physics
• Vertex (geometry)
• Meson
• Center of mass
• Particle physics
• Physics
• Rapidity

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