Production of the Doubly Charmed Baryons at the SELEX experiment -- The double intrinsic charm approach

TL;DR

This paper explains the high production rates of doubly charmed baryons observed in experiments using the double intrinsic charm model, aligning theoretical predictions with experimental data and extending to LHC fixed-target scenarios.

Contribution

It introduces a QCD-based double intrinsic charm approach to accurately predict doubly heavy baryon production rates and momentum distributions, addressing previous perturbative limitations.

Findings

Reproduces the high production rate and momentum distribution of doubly charmed baryons.

Shows the production rates are comparable to double J/ψ production.

Provides predictions for LHC fixed-target experiments.

Abstract

The high production rate and $\langle x_{F} \rangle > 0.33$ of the doubly charmed baryons measured by the SELEX experiment is not amenable to perturbative QCD analysis. In this paper we calculate the production of the doubly heavy baryons with the double intrinsic charm Fock states whose existence is rigorously predicted by QCD. The production rate and the longitudinal momentum distribution are both reproduced. We also show that the production rates of the doubly charmed baryons and double $J/\psi $ production observed by NA3 collaboration are comparable. Recent experimental results are reviewed. The production cross section of the doubly charmed baryons at a fixed-target experiment at the LHC is presented.