Year: 2026
Type: preprint
Abstract: A causal-horizon ensemble relates changes in prompt production to spatial correlations involved in forming $\X$. Each horizon represents the spatial coherence range of an early-field pulse. For weak phase fluctuations and overlap widths small compared with the mean horizon, ensemble averaging makes the fractional loss of formation probability proportional to the Gaussian source-state overlap width. Extending this dependence as an effective law at finite attenuation, we compare three states to eliminate the common field coefficient. A common-slope fit to matched LHCb prompt $\X/\Ps$ and $\Ps/\Jp$ ratios at 13 TeV gives conditional formation scales. With a common Gaussian source, common field coupling, fixed relative production baselines and a direct-$\Jp$ reference, the central fit requires a source root-mean-square width above about 0.60 fm and an $\X$ effective Gaussian RMS separation of at least about 1.25 fm. The same assumptions require at least a factor of about 4.5 increase in the $\X$ formation probability relative to its no-field value between 4--6 and 12--14 GeV/$c$ in $2
Source: arXiv (Cornell University)
Author: Yang, Yi
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W7222987672