2015
DOI: 10.1051/epjconf/20159700023
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The two Λ(1405) poles from photoproduction data

Abstract: Abstract. We present results extracting the position of the two Λ(1405) poles from experimental photoproduction data measured recently at different energies in the γp → K + π 0 Σ 0 and γp → K + π ± Σ ∓ reactions at Jefferson Lab. The analysis is done by means of a chiral dynamics motivated potential but with free parameters, which guarantees analyticity and unitarity in the solutions. With the best result we find the two Λ(1405) poles at about 1352 − 48i MeV and 1419 − 29i MeV.

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Cited by 3 publications
(4 citation statements)
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“…In the case of I(J P ) = 0 (1/2 − ), in both types of fits, a double pole structure is found in the energy region around 1400 MeV (see Table III), which can be related to Λ(1405). The double pole nature of Λ( 1405) is widely discussed in the literature [4,17,20,22,49,72,74].…”
Section: Resultsmentioning
confidence: 99%
See 1 more Smart Citation
“…In the case of I(J P ) = 0 (1/2 − ), in both types of fits, a double pole structure is found in the energy region around 1400 MeV (see Table III), which can be related to Λ(1405). The double pole nature of Λ( 1405) is widely discussed in the literature [4,17,20,22,49,72,74].…”
Section: Resultsmentioning
confidence: 99%
“…The list of references on this topic is extensive, but for some of the recent works we refer the reader to Refs. [15][16][17][18][19][20][21][22][23]. A lot of effort is being put in by the lattice community too, bringing valuable information on the topic [24][25][26][27][28][29][30].…”
Section: Introductionmentioning
confidence: 99%
“…Furthermore, it is also interesting to discuss the possible different predictions of the Λ(1405) polarization in the one-pole or two-pole pictures of the Λ(1405). To our best knowledge, such questions are still not discussed in previous works [10][11][12][13].…”
Section: Resultsmentioning
confidence: 89%
“…These data were analyzed in Refs. [10][11][12][13]. However, it seems current data cannot offer enough constraints on the model.…”
Section: Introductionmentioning
confidence: 99%