Multidimensional resonance analysis of Lambda+(c) ---> p K- pi+

Journal Article · Wed Dec 01 04:00:00 EST 1999 · Phys.Lett.B

DOI:https://doi.org/10.1016/S0370-2693(99)01397-0· OSTI ID:1893502

Aitala, E. M.

We present the results of a five-dimensional resonant amplitude analysis of the $$\Lambda_c^+{\to}pK^{-}\pi^{+}$$ system based on $$946\pm 38$$ reconstructed decays. These data were produced in 500 GeV/$$c$$ $$\pi^-$$-N interactions by Fermilab experiment E791. We report measurements of the amplitudes for $$\Lambda_c^+$$ decay into nonresonant $$pK^-\pi^+$$ and to $$p\bar{K}^{*0}(890)$$, $$\Delta^{++}(1232)K^-$$, and $$\Lambda(1520)\pi^+$$ and we comment on other possible resonant enhancements. This is the first complete amplitude analysis of the $$\Lambda_c^{+}{\to}pK^{-}\pi^{+}$$ system. We find that $$(54.8\pm5.5\pm3.5)$$% of the decays are nonresonant, $$(19.5\pm2.6\pm1.8)$$% of the decays are via the $$\bar{K}^{*0}$$ resonance, $$(18.0\pm2.9\pm2.9)$$% of the decays are via the $$\Delta^{++}$$ resonance, and $$(7.7\pm1.8\pm1.1)$$% of the decays are via the $$\Lambda(1520)$$ resonance. We find evidence for an increasingly negative polarization of the $$\Lambda_c^+$$ baryons as a function of $$p_T^2$$, in agreement with a recent model\cite{dha} and with a related measurement\cite{jez}.

• Research Organization: Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
• Sponsoring Organization: USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
• Contributing Organization: E791
• DOE Contract Number: AC02-07CH11359
• OSTI ID: 1893502
• Report Number(s): FERMILAB-PUB-99-349-E; arXiv:hep-ex/9912003; oai:inspirehep.net:510975
• Journal Information: Phys.Lett.B, Journal Name: Phys.Lett.B Vol. 471
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS