12th International Conference on Hard and Electromagnetic Probes of High-Energy Nuclear Collisions

The system-size dependence of the bottom-baryon-to-meson production in high-energy proton-proton collisions

24 Sept 2024, 09:00

20m

DEJIMA MESSE NAGASAKI

Oral presentation 3. Heavy quarks and quarkonia Parallel Session 10

Speaker

Min He (Nanjing University of Science & Technology)

Description

The latest measurement of bottom baryon-to-meson production ratio [1], $\Lambda_b/B$, in proton-proton collisions at the LHC, shows a continuous evolution from the saturation value toward the small value identified in electron-positron collisions as the system size reduces. We address this in a canonical ensemble statistical hadronization model, and demonstrate that the decreasing trend of $\Lambda_b/B$ can be quantitatively understood in terms of the canonical suppression on the yield of $\Lambda_b$ toward small system size caused by exact conservation of baryon number [2]. We have thereby proposed a plausible scenario for the origin of non-universality of heavy quark hadronization currently under hot debates.

[1] LHCb Collab., Phys. Rev. Lett. 132, 081901 (2024).
[2] Yuxuan Dai, Shouxing Zhao, and Min He, arXiv: 2402.03692 (2024).