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Mitra, R.*; Prasannaa, V. S.*; Garcia Ruiz, R. F.*; 佐藤 哲也; 阿部 穣里*; 酒見 泰寛*; Das, B. P.*; Sahoo, B. K.*
Physical Review A, 104(6), p.062801_1 - 062801_9, 2021/12
被引用回数:3 パーセンタイル:24.56(Optics)ローレンシウムを含む二原子分子における電子電気双極子モーメント(eEDM)および核-電子スカラー-擬スカラー相互作用の理論的研究をおこなった。反転に対する感度をさまざまな中性およびイオン分子について調べたところ、これらの系の実効電場が、eEDM実験が行われている他の既知の分子よりも約3
4倍大きいことがわかった。同様に、これらの超重元素分子は、
に違反するスカラー-擬スカラー核-電子相互作用に対して3倍以上の増強を示す。Woods-Saxon核モデルを用いて検討した結果、これらがLr核内の拡散表面相互作用に敏感であることが示唆された。
綿貫 峻*; 谷田 聖; Belle Collaboration*; 他175名*
Physical Review D, 99(3), p.032012_1 - 032012_13, 2019/02
被引用回数:14 パーセンタイル:56.42(Astronomy & Astrophysics)We report measurements of isospin asymmetry and difference of direct
asymmetries
between charged and neutral
decays. This analysis is based on the data sample containing
pairs that was collected with the Belle detector at the KEKB energy-asymmetric
collider. Using a sum-of-exclusive technique with invariant
mass up to 2.8 GeV/
, we obtain
% and
%, where the last uncertainty for
is due to the uncertainty on the production ratio of
to
in
decays. The measured value of
is consistent with zero, allowing us to constrain the resolved photon contribution in the
, and improve the branching fraction prediction. The result for
is consistent with the prediction of the SM. We also measure the direct
asymmetries for charged and neutral
decays. All the measurements are the most precise to date.
遊佐 洋右*; 谷田 聖; Belle Collaboration*; 他159名*
Physical Review D, 99(1), p.011102_1 - 011102_7, 2019/01
被引用回数:2 パーセンタイル:11.81(Astronomy & Astrophysics)We report a measurement of time-dependent violation in
decays using a data sample of
pairs collected by the Belle experiment running at the
resonance at the KEKB
collider. This decay proceeds mainly via a
"penguin" amplitude. The results are
(stat.)
(syst.) and
(stat.)
(syst.), which are the most precise measurements of
violation in this decay mode to date. The value for the
-violating parameter
is consistent with that obtained using decay modes proceeding via a
"tree" amplitude.
足立 一郎*; 谷田 聖; Belle Collaboration*; 他421名*
Physical Review Letters, 121(26), p.261801_1 - 261801_11, 2018/12
被引用回数:10 パーセンタイル:56.13(Physics, Multidisciplinary)We present first evidence that the cosine of the -violating weak phase
is positive, and hence exclude trigonometric multifold solutions of the CKM Unitarity Triangle using a time-dependent Dalitz plot analysis of
with
decays, where
denotes a light unflavored and neutral hadron. The measurement is performed combining the final data sets of the BaBar and Belle experiments collected at the
resonance at the asymmetric-energy B factories PEP-II at SLAC and KEKB at KEK, respectively. The data samples contain
pairs recorded by the BaBar detector and
pairs recorded by the Belle detector. The results of the measurement are
and
. The result for the direct measurement of the angle
of the CKM Unitarity Triangle is
. The quoted model uncertainties are due to the composition of the
decay amplitude model, which is newly established by performing a Dalitz plot amplitude analysis using a high-statistics
data sample. CP violation is observed in
decays at the level of
standard deviations. The significance for
is
standard deviations. The trigonometric multifold solution
is excluded at the level of
standard deviations. The measurement resolves an ambiguity in the determination of the apex of the CKM Unitarity Triangle.
足立 一郎*; 谷田 聖; Belle Collaboration*; 他406名*
Physical Review D, 98(11), p.112012_1 - 112012_29, 2018/11
被引用回数:18 パーセンタイル:61.96(Astronomy & Astrophysics)We report measurements of and
from a time-dependent Dalitz plot analysis of
with
decays, where the light unflavored and neutral hadron
is a
,
, or
meson. The analysis is performed with a combination of the final data sets of the BABAR and Belle experiments containing
and
pairs collected at the
resonance at the asymmetric-energy B factories PEP-II at SLAC and KEKB at KEK, respectively. We measure
and
. The result for the direct measurement of the angle is
. The last quoted uncertainties are due to the composition of the
decay amplitude model, which is newly established by a Dalitz plot amplitude analysis of a high-statistics
data sample as part of this analysis. We find the first evidence for
at the level of
standard deviations. The measurement excludes the trigonometric multifold solution
at the level of
standard deviations and therefore resolves an ambiguity in the determination of the apex of the CKM Unitarity Triangle. The hypothesis of
is ruled out at the level of
standard deviations, and thus
violation is observed in
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
被引用回数:12 パーセンタイル:43.26(Astronomy & Astrophysics)We report a measurement of time-dependent violation parameters in
decays. The study is based on a data sample, containing
pairs, that was collected at the
resonance with the Belle detector at the KEKB asymmetric-energy
collider. We obtain the
violation parameters of
and
for the invariant mass of the
system up to 2.1 GeV/
.
Babu, V.*; 谷田 聖; Belle Collaboration*; 他197名*
Physical Review D, 97(1), p.011101_1 - 011101_8, 2018/01
被引用回数:11 パーセンタイル:46.13(Astronomy & Astrophysics)We search for violation in the charged charm meson decay
, based on a data sample corresponding to an integrated luminosity of
collected by the Belle experiment at the KEKB
asymmetric-energy collider. The measured
violating asymmetry is
, which is consistent with the standard model prediction and has a significantly improved precision compared to previous results.