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Properties of the Lambda(1670)(1-)/2 resonance
D M Manley ; V V Abaev ; C E Allgower ; V Bekrenev ; W J Briscoe ; M Clajus ; J R Comfort ; K Craig ; D Grosnick ; D Isenhower ; N Knecht ; D D Koetke ; A A Kulbardis ; N G Kozlenko ; S Kruglov ; G Lolos ; I V Lopatin ; R Manweiler ; A Marusić ; S McDonald ; B M K Nefkens ; J Olmsted ; Z Papandreou ; D C Peaslee ; N Phaisangittisakul ; S Prakhov ; J W Price ; A F Ramirez ; M Sadler ; A Shafi ; H Spinka ; T D S Stanislaus ; A Starostin ; H M Staudenmaier ; I I Strakovsky ; I Supek ; W B Tippens ; ;
Date:	7 Jan 2002
Journal:	Phys Rev Lett, 88 (1), 012002
Abstract:	Recently the Crystal Ball Collaboration measured precise new data for the near-threshold reaction K(-)p-->etaLambda, which is dominated by formation of the Lambda(1670)1 / 2(-). In this Letter, we present results of a unitary, multichannel analysis that incorporates the new Crystal Ball data. For our preferred fit, we obtain mass M = 1673+/-2 MeV, width Gamma = 23+/-6 MeV, and elasticity x = 0.37+/-0.07. This elasticity is significantly larger than previously recognized. Resonance parameters of our preferred fit are in striking agreement with the quark-model predictions of Koniuk and Isgur.
Source:	PubMed, pmid11800936
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