Abstract
A new particle σ* with JP = 1/2− was predicted by unquenched quark models with its mass around the well established σ* (1385) with JP = 3/2+. Here we re-examine some old data of the K− p → Λπ−π+ reaction. Firstly we re-fit the data for kaon beam momenta in the range of 1.0–1.8 GeV. Secondly we study the reaction at the energies around Λ* (1520) peak. Both studies show evidence for the existence of σ* with JP = 1/2− around 1380 MeV. Higher statistic data on relevant reactions are needed to clarify the situation.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
