| _version_ | 1866901623195828224 |
|---|---|
| author | Berretta, Francesco |
| author_facet | Berretta, Francesco |
| contents | <p>Contact email multiversou@gmail.com</p> <p>This report analyzes the unfolding procedure used by the ALICE collaboration to extract strangeness multiplicity distributions P(ns) in high-multiplicity pp collisions at √s = 13 TeV. While the approach marks a methodological advance, the Bayesian unfolding is shown to be ill-conditioned due to low reconstruction efficiencies (A × ε < 10%), leading to prior-dominated tail behavior. A sensitivity analysis using alternative priors (Poisson, exponential) reveals up to 61% variation in tail moments, exceeding ALICE’s reported systematics by a factor of two. These uncertainties propagate into higher-order yields (Yns), potentially weakening the claimed agreement with PYTHIA 8 over EPOS LHC in AS = 0 ratios. Recommendations include explicit prior sensitivity tests, regularization techniques, and bias-corrected multiplicity plots to ensure robustness in future Run 3 analyses.</p> |
| format | Recurso digital |
| id | zenodo_https___doi_org_10_5281_zenodo_17635182 |
| institution | Zenodo |
| language | |
| publishDate | 2025 |
| publisher | Zenodo |
| record_format | zenodo |
| spellingShingle | Unfolding Sensitivity in ALICE Strangeness Multiplicities: Model Dependence in the Tails Berretta, Francesco <p>Contact email multiversou@gmail.com</p> <p>This report analyzes the unfolding procedure used by the ALICE collaboration to extract strangeness multiplicity distributions P(ns) in high-multiplicity pp collisions at √s = 13 TeV. While the approach marks a methodological advance, the Bayesian unfolding is shown to be ill-conditioned due to low reconstruction efficiencies (A × ε < 10%), leading to prior-dominated tail behavior. A sensitivity analysis using alternative priors (Poisson, exponential) reveals up to 61% variation in tail moments, exceeding ALICE’s reported systematics by a factor of two. These uncertainties propagate into higher-order yields (Yns), potentially weakening the claimed agreement with PYTHIA 8 over EPOS LHC in AS = 0 ratios. Recommendations include explicit prior sensitivity tests, regularization techniques, and bias-corrected multiplicity plots to ensure robustness in future Run 3 analyses.</p> |
| title | Unfolding Sensitivity in ALICE Strangeness Multiplicities: Model Dependence in the Tails |
| url | https://doi.org/10.5281/zenodo.17635182 |