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Journal Articles

Theoretical analysis on the $$K^{-3}$$He $$rightarrow Lambda pn$$ reaction for the $$bar{K} N N$$ bound-state search in the J-PARC E15 experiment

Sekihara, Takayasu; Oset, E.*; Ramos, A.*

Proceedings of Science (Internet), 310, 5 Pages, 2018/03

Journal Articles

What makes the peak structure of the $$Lambda p$$ invariant-mass spectrum in the $$K^{-3} rm He rightarrow Lambda$$$$pn$$ reaction?

Sekihara, Takayasu; Oset, E.*; Ramos, A.*

Acta Physica Polonica B, 48(10), p.1869 - 1874, 2017/10

 Times Cited Count:1 Percentile:81.71(Physics, Multidisciplinary)

Journal Articles

Theoretical study of the $$Xi(1620)$$ and $$Xi(1690)$$ resonances in $$Xi_c to pi+MB$$ decays

Miyahara, Kenta*; Hyodo, Tetsuo*; Oka, Makoto; Nieves, J.*; Oset, E.*

Physical Review C, 95(3), p.035212_1 - 035212_12, 2017/03

 Times Cited Count:16 Percentile:9.92(Physics, Nuclear)

Nonleptonic weak decays of $$Xi_c$$ into $$pi^+$$ and a meson-baryon final state, $$MB$$, are analyzed from the viewpoint of probing $$S=-2$$ baryon resonances, i.e. $$Xi (1620)$$ and $$Xi (1690)$$. We argue that the weak decay of $$Xi_c$$ is dominated by a single quark-line diagram. The decay process has an advantage of being free from meson resonances in the $$pi+M$$ invariant mass distribution. The invariant mass distribution of the meson-baryon final state is calculated, assuming that the $$Xi (1620)$$ and $$Xi (1690)$$ resonances have $$J^P = 1/2^-$$. It is found that a clear peak for the $$Xi(1690)$$ is seen in the $$pi Xi$$ and $$K^-Lambda$$ spectra. We also suggest that the ratios of the $$pi Xi$$, $$K^-Lambda$$ and $$K^-Sigma$$ final states are useful to distinguish whether the peak is originated from the $$Xi (1690)$$ resonance or it is a $$K^- Sigma$$ threshold effect.

Journal Articles

The Peak structure in the in-flight $$^{3}$$He$$(K^{-}, Lambda p) n$$ reaction around the $$bar{K} N N$$ Threshold

Sekihara, Takayasu; Oset, E.*; Ramos, A.*

JPS Conference Proceedings (Internet), 13, p.020002_1 - 020002_5, 2017/02

Journal Articles

On the structure observed in the in-flight $$^{3}$$He($$K^{-}, Lambda p)n$$ reaction at J-PARC

Sekihara, Takayasu; Oset, E.*; Ramos, A.*

Progress of Theoretical and Experimental Physics (Internet), 2016(12), p.123D03_1 - 123D03_27, 2016/12

AA2016-0237.pdf:1.53MB

 Times Cited Count:29 Percentile:10.42(Physics, Multidisciplinary)

Journal Articles

Two-, three-, many-body systems involving mesons. Multimeson condensates

Oset, E.*; 10 of others*; Oka, Makoto

Acta Physica Polonica B, 47(2), p.357 - 365, 2016/02

 Times Cited Count:3 Percentile:62.78(Physics, Multidisciplinary)

We review results from studies with unconventional many-hadron systems containing mesons: systems with two mesons and one baryon, three mesons, some novel systems with two baryons and one meson, and finally, systems with many vector mesons, up to six, with their spins aligned forming states of increasing spin. We show that in many cases, one has experimental counterparts for the states found, while in some other cases, they remain as predictions, which we suggest to be searched in BESIII, Belle, LHCb, FAIR and other facilities.

Oral presentation

On the structure observed in the in-flight $$^{3}$$He$$(K^{-}, Lambda p)n$$ reaction at J-PARC

Sekihara, Takayasu; Oset, E.*; Ramos, A.*

no journal, , 

Oral presentation

On the structure observed in the in-flight $$^{3}$$He($$K^{-}, Lambda p)n$$ reaction at J-PARC

Sekihara, Takayasu; Oset, E.*; Ramos, A.*

no journal, , 

Oral presentation

On the structure observed in the in-flight $$^{3}$$He($$K^{-}, Lambda p)n$$ reaction at J-PARC

Sekihara, Takayasu; Oset, E.*; Ramos, A.*

no journal, , 

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