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論文

Measurement of the energy dependence of the $$e^+e^-to Bbar{B}$$, $$Bbar{B}^*$$ and $$B^*bar{B}^*$$ exclusive cross sections

Mizuk, R.*; 谷田 聖; Belle Collaboration*; 他188名*

Journal of High Energy Physics (Internet), 2021(6), p.137_1 - 137_35, 2021/06

https://doi.org/10.1007/JHEP06(2021)137
 被引用回数：6 パーセンタイル：45.23(Physics, Particles & Fields)

We report the first measurement of the exclusive cross sections $$e^+e^-to Bbar{B}$$, $$e^+e^-to Bbar{B}^*$$, and $$e^+e^-to B^*bar{B}^*$$ in the energy range from 10.63 GeV to 11.02 GeV. The $$B$$ mesons are fully reconstructed in a large number of hadronic final states and the three channels are identified using a beam-constrained-mass variable. The shapes of the exclusive cross sections show oscillatory behavior with several maxima and minima. The results are obtained using data collected by the Belle experiment at the KEKB asymmetric-energy $$e^+e^-$$ collider.

論文

Measurement of time-dependent $$CP$$ asymmetries in $$B^{0}to K_S^0 eta gamma$$ decays

中野 浩至*; 谷田 聖; Belle Collaboration*; 他188名*

Physical Review D, 97(9), p.092003_1 - 092003_10, 2018/05

AA2018-0584.pdf:0.54MB

https://doi.org/10.1103/PhysRevD.97.092003
 被引用回数：7 パーセンタイル：37.62(Astronomy & Astrophysics)

We report a measurement of time-dependent $$CP$$ violation parameters in $${B^0 to K_S^0 eta gamma}$$ decays. The study is based on a data sample, containing $${772 times 10^6 Bbar{B}}$$ pairs, that was collected at the $$Upsilon(4S)$$ resonance with the Belle detector at the KEKB asymmetric-energy $$e^+ e^-$$ collider. We obtain the $$CP$$ violation parameters of $${{cal S} = -1.32 pm 0.77 {rm (stat.)} pm 0.36{rm (syst.)}}$$ and $${{cal A} = -0.48 pm 0.41 {rm (stat.)} pm 0.07{rm (syst.)}}$$ for the invariant mass of the $$K_S^0 eta$$ system up to 2.1 GeV/$$c^2$$.

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