Quark Matter 2025

First ALICE measurement of $\text{B}^\pm \rightarrow \text{J}/\psi + \text{K}^\pm$ in pp collisions

Not scheduled

20m

Goethe University Frankfurt, Campus Westend, Theodor-W.-Adorno-Platz 1, 60629 Frankfurt am Main, Germany

Poster Heavy flavor & quarkonia Poster session 2

Speaker

Ida Storehaug (University of Oslo (NO))

Description

Ida Storehaug, for the ALICE Collaboration

The $\text{B}^\pm$ meson is the most frequently produced beauty meson in proton-proton (pp) collisions at the LHC. Measuring its production cross-section is important for two reasons. First, it allows for testing of perturbative quantum chromodynamics calculations. Second, the $\text{B}^\pm$ meson cross-section measurement provides an essential reference for measurements of the nuclear modification factor ($R_{\text{AA}}$) in heavy-ion collisions. Here, we present the first preliminary results from ALICE on the $\text{B}^\pm$ meson cross-section measured in the $\text{J}/\psi + \text{K}^\pm$ channel, covering the previously unexplored region at low pT and midrapidity (|y|<0.9). Achieving this measurement for the first time in Run 3 has been made possible by two critical advancements: the high statistics from increased luminosity recorded by ALICE in Run 3, and the improved vertex resolution provided by the upgraded Inner Tracking System, which enables the reconstruction of $\text{B}^\pm$ meson candidates.