Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
and 
lifetimes at Belle IIAbudin
n, F.*; 谷田 聖; Belle II Collaboration*; 他385名*
Physical Review Letters, 127(21), p.211801_1 - 211801_9, 2021/11
被引用回数：6 パーセンタイル：60.19(Physics, Multidisciplinary)We report a measurement of the and lifetimes using 
and 
decays reconstructed in 
data recorded by the Belle II experiment at the SuperKEKB asymmetric-energy 
collider. The data, collected at center-of-mass energies at or near the 
resonance, correspond to an integrated luminosity of 
. The results, 
and 
, are the most precise to date and are consistent with previous determinations.
collisions at Belle IIAbudinn, F.*; 谷田 聖; Belle II Collaboration*; 他334名*
Physical Review Letters, 125(16), p.161806_1 - 161806_9, 2020/10
被引用回数：40 パーセンタイル：92.14(Physics, Multidisciplinary)We present a search for the direct production of a light pseudoscalar 
decaying into two photons with the Belle II detector at the SuperKEKB collider. We search for the process 
in the mass range 
using data corresponding to an integrated luminosity of 
pb
. Light pseudoscalars interacting predominantly with standard model gauge bosons (so-called axion-like particles or ALPs) are frequently postulated in extensions of the standard model. We find no evidence for ALPs and set 95% confidence level upper limits on the coupling strength 
of ALPs to photons at the level of 
GeV. The limits are the most restrictive to date for 
GeV/
.
Abudinn, F.*; 谷田 聖; Belle II Collaboration*; 他420名*
Chinese Physics C, 44(2), p.021001_1 - 021001_12, 2020/02
被引用回数：24 パーセンタイル：93.66(Physics, Nuclear)From April to July 2018, a data sample at the peak energy of the resonance was collected with the Belle II detector at the SuperKEKB electron-positron collider. This is the first data sample of the Belle II experiment. Using Bhabha and digamma events, we measure the integrated luminosity of the data sample to be (
) pb, where the first uncertainty is statistical and the second is systematic. This work provides a basis for future luminosity measurements at Belle II.
