Speaker
Description
First results from the PHENIX experiment on the fraction of $J/\psi$ mesons at midrapidity region ($\mid \eta \mid <$ 0.35 ) coming from $B$-meson decay ($F_{B{\rightarrow}J/\psi}$) in $p$+$p$ collisions at $\sqrt{s}=$~200~GeV at RHIC will be presented. The measurement is performed using the central silicon vertex detector, which provides precise tracking and distance-of-closest-approach determinations, enabling the statistical separation of $J/\psi$ due to $B$-meson decays from prompt $J/\psi$. PHENIX results will be shown across a large rapidity range, and compared to other experiments as a function of transverse momentum, and center of mass energy. In addition, the interpretation of the results with respect to fixed-order-next-to-leading-logarithm, and the current theoretical model calculations are provided for better understanding of the underlying physics. It should be noted that the measurement of bottom ($B$) mesons in $p$+$p$ collisions is of interest to constrain the total bottom cross section as well as test our understanding of bottom quark production mechanisms and hadronization. The present results in $p$+$p$ collisions are crucial baseline for the future measurements of $B$-meson decay in more complex environments like in Au $+$ Au collisions at maximum RHIC energy where the quark-gluons plasma has been created.
| Category | Experiment |
|---|---|
| Collaboration (if applicable) | PHENIX |
