TY - JOUR
T1 - Multidimensional resonance analysis of Λ(c)/+ → pK- π+
AU - Aitala, E. M.
AU - Amato, S.
AU - Anjos, J. C.
AU - Appel, J. A.
AU - Ashery, D.
AU - Banerjee, S.
AU - Bediaga, I.
AU - Blaylock, G.
AU - Bracker, S. B.
AU - Burchat, P. R.
N1 - Funding Information:
It is a pleasure to acknowledge useful conversations with William Dunwoodie, Gary Goldstein, and Fred Myhrer. We gratefully acknowledge the staffs of Fermilab and of all the participating institutions. This research was supported by the Brazilian Conselho Nacional de Desenvolvimento Cientı́fico e Technológio, the Mexican Consejo Nacional de Ciencia y Tecnologica, the Israeli Academy of Sciences and Humanities, the US Department of Energy, the US-Israel Binational Science Foundation, and the US National Science Foundation. Fermilab is operated by the Universities Research Association, Inc., under contract with the United States Department of Energy.
PY - 2000/1/6
Y1 - 2000/1/6
N2 - We present the results of a five-dimensional resonant amplitude analysis of the Λ(c)/+ → pK- π+ system based on 946 ± 38 reconstructed decays. These data were produced in 500 GeV/c π-N interactions by Fermilab experiment E791. We report measurements of the amplitudes for Λ(c)/+ decay into nonresonant pK-π+ and to pK̄*0(890), Δ++(1232)K-, and Λ(1520)π+ and we comment on other possible resonant enhancements. This is the first complete amplitude analysis of the Λ(c)/+ → pK-π+ system. We find that (54.8 ± 5.5 ± 3.5)% of the decays are nonresonant, (19.5 ± 2.6 ± 1.8)% of the decays are via the K̄*(0) resonance, (18.0 ± 2.9 ± 2.9)% of the decays are via the Δ++ resonance, and (7.7 ± 1.8 ± 1.1)% of the decays are via the Λ(1520) resonance. We find evidence for an increasingly negative polarization of the Λ(c)/+ baryons as a function of p(T)/2, in agreement with a recent model [W.G.D. Dharmaratna, G.R. Goldstein, Phys. Rev. D 53 (1996) 1073; G.R. Goldstein, hep-ph/9907573] and with a related measurement [M. Jezabek, K. Rybicki, R. Rylko, Phys. Lett. B 286 (1992) 175]. (C) 2000 Published by Elsevier Science B.V.
AB - We present the results of a five-dimensional resonant amplitude analysis of the Λ(c)/+ → pK- π+ system based on 946 ± 38 reconstructed decays. These data were produced in 500 GeV/c π-N interactions by Fermilab experiment E791. We report measurements of the amplitudes for Λ(c)/+ decay into nonresonant pK-π+ and to pK̄*0(890), Δ++(1232)K-, and Λ(1520)π+ and we comment on other possible resonant enhancements. This is the first complete amplitude analysis of the Λ(c)/+ → pK-π+ system. We find that (54.8 ± 5.5 ± 3.5)% of the decays are nonresonant, (19.5 ± 2.6 ± 1.8)% of the decays are via the K̄*(0) resonance, (18.0 ± 2.9 ± 2.9)% of the decays are via the Δ++ resonance, and (7.7 ± 1.8 ± 1.1)% of the decays are via the Λ(1520) resonance. We find evidence for an increasingly negative polarization of the Λ(c)/+ baryons as a function of p(T)/2, in agreement with a recent model [W.G.D. Dharmaratna, G.R. Goldstein, Phys. Rev. D 53 (1996) 1073; G.R. Goldstein, hep-ph/9907573] and with a related measurement [M. Jezabek, K. Rybicki, R. Rylko, Phys. Lett. B 286 (1992) 175]. (C) 2000 Published by Elsevier Science B.V.
KW - Multidimensional
KW - Polarization
KW - Resonance
KW - Λ(c)
UR - http://www.scopus.com/inward/record.url?scp=0034610708&partnerID=8YFLogxK
U2 - 10.1016/S0370-2693(99)01397-0
DO - 10.1016/S0370-2693(99)01397-0
M3 - ???researchoutput.researchoutputtypes.contributiontojournal.article???
AN - SCOPUS:0034610708
SN - 0370-2693
VL - 471
SP - 449
EP - 459
JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
IS - 4
ER -