9th International Conference on New Frontiers in Physics (ICNFP 2020)

Measurement of bb_bar production at forward rapidity in p+p collisions at \sqrt{s} = 510 GeV

10 Sept 2020, 17:20

25m

Room 2

Talk Workshop on Physics at FAIR-NICA-SPS-BES/RHIC

Speaker

Murad Sarsour (Georgia State University)

Description

Heavy flavor quarks are an important probe of the initial state of the Quark Gluon Plasma formed in heavy-ion collisions. Bottom and charm quarks are produced early in the collision, primarily through hard interactions, and experience the full evolution of the medium. Understanding bottom quark production in $p$+$p$ collisions gives a baseline reference for studying larger collision systems. The measurement of the $b\overline{b}$ cross section gives insight into $b$ quark production mechanisms which can directly test pQCD predictions. Utilizing the unique properties of neutral $B$ meson oscillation, the $b\overline{b}$ signal is extracted from like-sign dimuons with invariant mass of 5--10 GeV/$c^2$ at forward rapidity. Measuring like-sign dimuons within this mass range provides an enriched bottom signal with minimal amount of open charm background and without any contributions from quarkonia or Drell-Yan pairs. In this talk, we report the $b\overline{b}$ differential cross section and extrapolated total cross section. The azimuthal opening angle between muon pairs from $b\overline{b}$ decays and their $p_T$ distributions will also be presented. The total cross section at $\sqrt{s}$ = 510 GeV is compared to world data at different energies and to a perturbative quantum chromodynamics calculation.

Details

Murad Sarsour, Professor, Georgia State University, USA
https://www.gsu.edu/

Presentation materials

ICNFP2020.bb_bar_Sarsour.pdf