{"paper":{"title":"Muonic hydrogen cascade time and lifetime of the short-lived $2S$ state","license":"","headline":"","cross_cats":[],"primary_cat":"physics.atom-ph","authors_text":"A. Antognini, A. Dax, C.A.N.Conde, C.M.B. Monteiro, C. Schwob, D.Taqqu, F. Biraben, F.D. Amaro, F. Kottmann, F. Mulhauser, F. Nez, J.A.M. Lopes, J.F.C.A. Veloso, J.M.F. dos Santos, J.M.R. Cardoso, L.A. Schaller, L. Julien, L. Ludhova, L.M.P. Fernandes, P.E. Knowles, P. Indelicato, P. Rabinowitz, R. Pohl, S. Dhawan, T.W. Haensch, V.W. Hughes, Y.-W. Liu","submitted_at":"2006-11-13T16:25:38Z","abstract_excerpt":"Metastable ${2S}$ muonic-hydrogen atoms undergo collisional ${2S}$-quenching, with rates which depend strongly on whether the $\\mu p$ kinetic energy is above or below the ${2S}\\to {2P}$ energy threshold. Above threshold, collisional ${2S} \\to {2P}$ excitation followed by fast radiative ${2P} \\to {1S}$ deexcitation is allowed. The corresponding short-lived $\\mu p ({2S})$ component was measured at 0.6 hPa $\\mathrm{H}_2$ room temperature gas pressure, with lifetime $\\tau_{2S}^\\mathrm{short} = 165 ^{+38}_{-29}$ ns (i.e., $\\lambda_{2S}^\\mathrm{quench} = 7.9 ^{+1.8}_{-1.6} \\times 10^{12} \\mathrm{s}^"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"physics/0611121","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}