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Journal Articles

"$$K^-pp$$", a $$bar K$$-meson nuclear bound state, observed in $$^3$$He($$K^-,Lambda p)n$$ reactions

Hashimoto, Tadashi; Tanida, Kiyoshi; 67 of others*

Physics Letters B, 789, p.620 - 625, 2019/02

https://doi.org/10.1016/j.physletb.2018.12.058
 Times Cited Count：33 Percentile：95.08(Astronomy & Astrophysics)

We observed a distinct peak in the $$Lambda p$$ invariant mass spectrum of $$^{3}{rm He}(K^-, , Lambda p)n$$, well below $$m_K + 2m_p$$, $$i.e.$$, the mass threshold of the $$K^-$$ to be bound to two protons. By selecting a relatively large momentum-transfer region $$q = 350 sim650$$ MeV/$$c$$, one can clearly separate the peak from the quasi-free process,$$overline{K}N rightarrow overline{K}N$$ followed by the non-resonant absorption by the non-resonant absorption by the two spectator-nucleons $$overline{K}NN rightarrow Lambda N$$. We found that the simplest fit to the observed peak gives us a Breit-Wignerpole position at $$B_{rm {it Kpp}} = 47 pm 3 , (stat.) ,^{+3}_{-6},(sys.)$$ MeV having a width $$Gamma_{rm {it Kpp}} = 115 pm 7 , (stat.),^{+10}_{-20} ,(sys.)$$ MeV, and the $$S$$-wave Gaussian reaction form-factor parameter $$Q_{rm {it Kpp}} = 381 pm 14 , (stat.),^{+57}_{-0} ,(sys.)$$MeV/$$c$$, as a new form of the nuclear bound system with strangeness -"$$K^-pp$$".

Journal Articles

Production cross sections of hyperons and charmed baryons from $$e^+e^-$$ annihilation near $$sqrt{s} = 10.52$$ GeV

Niiyama, Masayuki*; Tanida, Kiyoshi; Belle Collaboration*; 167 of others*

Physical Review D, 97(7), p.072005_1 - 072005_21, 2018/04

AA2018-0515.pdf:1.37MB

https://doi.org/10.1103/PhysRevD.97.072005
 Times Cited Count：19 Percentile：69.32(Astronomy & Astrophysics)

Journal Articles

Observation of an alternative $$chi_{c0}(2P)$$ candidate in $$e^+e^- to J/psi Dbar{D}$$

Chilikin, K.*; Tanida, Kiyoshi; Belle Collaboration*; 167 of others*

Physical Review D, 95(11), p.112003_1 - 112003_17, 2017/06

AA2017-0237.pdf:0.72MB

https://doi.org/10.1103/PhysRevD.95.112003
 Times Cited Count：47 Percentile：89.68(Astronomy & Astrophysics)

Journal Articles

Heavy-quark production and elliptic flow in Au + Au collisions at $$sqrt{s_{NN}} = 62.4$$ GeV

Adare, A.*; Tanida, Kiyoshi; PHENIX Collaboration*; 367 of others*

Physical Review C, 91(4), p.044907_1 - 044907_19, 2015/04

AA2015-0711.pdf:1.19MB

https://doi.org/10.1103/PhysRevC.91.044907
 Times Cited Count：18 Percentile：75(Physics, Nuclear)

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