Journal
PHYSICAL REVIEW C
Volume 95, Issue 1, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevC.95.015205
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Funding
- Chinese Academy of Science [2013T2J0012]
- National Natural Science Foundation of China [11565007, 11547307, 11475227, 11505158]
- Youth Innovation Promotion Association CAS [2016367]
- DFG
- NSFC [CRC 110, 11621131001]
- Chinese Academy of Sciences [QYZDB-SSW-SYS013]
- Thousand Talents Plan for Young Professionals
- China Postdoctoral Science Foundation [2015M582197]
- Postdoctoral Research Sponsorship in Henan Province [2015023]
- Spanish Ministerio de Economia y Competitividad
- European FEDER funds [FIS2011-28853-C02-01, FIS2011-28853-C02-02, FIS2014-57026-REDT, FIS2014-51948-C2-1-P, FIS2014-51948-C2-2-P]
- Generalitat Valenciana in the program Prometeo [II-2014/068]
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We show the effects of a triangle singularity mechanism for the gamma p -> K+Lambda(1405) reaction. The mechanism has a N-* resonance around 2030 MeV, which decays into K*Sigma. The K-* decays to K+ pi, and the pi Sigma merge to form the Lambda (1405). This mechanism produces a peak around root s = 2110 MeV, and has its largest contribution around cos theta= 0. The addition of this mechanism to other conventional ones leads to a good reproduction of d sigma/dcos theta and the integrated cross section around this energy, providing a solution to a problem encountered in previous theoretical models.
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