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論文

Observation of an excited $$Omega^-$$ Baryon

Yelton, J.*; 谷田 聖; Belle Collaboration*; 他190名*

Physical Review Letters, 121(5), p.052003_1 - 052003_7, 2018/08

 被引用回数:7 パーセンタイル:6.69(Physics, Multidisciplinary)

Using data recorded with the Belle detector, we observe a new excited hyperon, an $$Omega^{*-}$$ candidate decaying into $$Xi^0K^-$$ and $$Xi^-K^0_S$$ with a mass of $$2012.4pm0.7 {rm (stat)pm 0.6 (rm syst)} {rm MeV}/c^2$$ and a width of $$Gamma=6.4^{+2.5}_{-2.0} {rm(stat)}pm1.6 {rm(syst)} {rm MeV}$$. The $$Omega^{*-}$$ is seen primarily in $$Upsilon(1S), Upsilon(2S)$$, and $$Upsilon(3S)$$ decays.

論文

Observation of excited $$Omega_c$$ charmed baryons in $$e^+e^-$$ collisions

Yelton, J.*; 谷田 聖; Belle Collaboration*; 他177名*

Physical Review D, 97(5), p.051102_1 - 051102_6, 2018/03

 被引用回数:12 パーセンタイル:3.72(Astronomy & Astrophysics)

Using the entire Belle data sample of 980 $${rm fb}^{-1}$$ of $$e^+e^-$$ collisions, we present the results of a study of excited $$Omega_c$$ charmed baryons in the decay mode $$Xi_c^+K^-$$. We show confirmation of four of the five narrow states reported by the LHCb Collaboration: the $$Omega_c(3000)$$, $$Omega_c(3050)$$, $$Omega_c(3066)$$, and $$Omega_c(3090)$$.

論文

Measurement of branching fractions of hadronic decays of the $$Omega_c^0$$ baryon

Yelton, J.*; 谷田 聖; Belle Collaboration*; 他187名*

Physical Review D, 97(3), p.032001_1 - 032001_8, 2018/02

 被引用回数:1 パーセンタイル:64.74(Astronomy & Astrophysics)

Using a data sample of 980 $${rm fb}^{-1}$$ of $$e^+e^-$$ annihilation data taken with the Belle detector operating at the KEKB asymmetric-energy $$e^+e^-$$ collider, we report the results of a study of the decays of the $$Omega_c^0$$ charmed baryon into hadronic final states. We report the most precise measurements to date of the relative branching fractions of the $$Omega_c^0$$ into $$Omega^-pi^+pi^0$$, $$Omega^-pi^+pi^-pi^+$$, $$Xi^-K^-pi^+pi^+$$, and $$Xi^0K^-pi^+$$, as well as the first measurements of the branching fractions of the $$Omega_c^0$$ into $$Xi^-bar{K}^0pi^+$$, $$Xi^0bar{K}^0$$, and $$Lambda bar{K}^0bar{K}^0$$, all with respect to the $$Omega^-pi^+$$ decay. In addition, we investigate the resonant substructure of these modes. Finally, we present a limit on the branching fraction for the decay $$Omega_c^0toSigma^+K^-K^-pi^+$$.

論文

Study of excited $$Xi_c$$ states decaying into $$Xi_c^0$$ and $$Xi_c^+$$ baryons

Yelton, J.*; 谷田 聖; Belle Collaboration*; 他155名*

Physical Review D, 94(5), p.052011_1 - 052011_14, 2016/09

AA2016-0394.pdf:0.69MB

 被引用回数:26 パーセンタイル:7.88(Astronomy & Astrophysics)

Using a data sample of 980 fb$$^{-1}$$ of $$e^+e^-$$ annihilation data taken with the Belle detector operating at the KEKB asymmetric-energy $$e^+e^-$$ collider, we report the results of a study of excited $$Xi_c$$ states that decay, via the emission of photons and/or charged pions, into $$Xi_c^0$$ or $$Xi_c^+$$ ground state charmed-strange baryons. We present new measurements of the masses of all members of the $$Xi_c'$$, $$Xi_c(2645)$$, $$Xi_c(2790)$$, $$Xi_c(2815)$$, $$Xi_c(2980)$$ isodoublets, measurements of the intrinsic widths of those that decay strongly, and evidence of previously unknown transitions.

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