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論文

Angular analysis of the $$e^+ e^- to D^{(*) pm} D^{* mp}$$ process near the open charm threshold using initial-state radiation

Zhukova, V.*; 谷田 聖; Belle Collaboration*; 他155名*

Physical Review D, 97(1), p.012002_1 - 012002_21, 2018/01

AA2018-0507.pdf:1.29MB

 被引用回数:7 パーセンタイル:41.87(Astronomy & Astrophysics)

We report a new measurement of the exclusive $$e^+ e^- to D^{(*) pm} D^{*mp}$$ cross sections as a function of the center-of-mass energy from the $$D^{(*) pm} D^{* mp}$$ threshold through $$sqrt{s}=6.0$$ GeV with initial-state radiation. The analysis is based on a data sample collected with the Belle detector with an integrated luminosity of $$951$$ fb$$^{-1}$$. The accuracy of the cross section measurement is increased by a factor of two over the first Belle study. We perform the first angular analysis of the $$e^+ e^- to D^{* pm} D^{* mp}$$ process and decompose this exclusive cross section into three components corresponding to the $$D^*$$ helicities.

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:55 パーセンタイル:91.99(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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