17 papers
Measurement of Born Cross Section for at GeV
BESIII Collaboration, M. Ablikim, M. N. Achasov +759
Using collision data collected with the BESIII detector at the BEPCII collider corresponding to a total integrated luminosity of 44~fb, we present the first measure…
First Measurement of the Relative Phase between Proton Psionic Form Factors
BESIII Collaboration, M. Ablikim, M. N. Achasov +754
The relative phase between the time-like form factors of the proton is a crucial observable for a complete understanding of its internal structure, yet it has remained unmeasured d…
Study of decays at Belle and Belle II
Belle, Belle II Collaborations, : +412
We report a measurement of the branching fraction for the leptonic decay . This work presents the first result using Belle~II data, an updated Be…
Study of via initial-state radiation at Belle~II
Belle II Collaboration, M. Abumusabh, I. Adachi +417
Using a data sample of 427.9 fb collected by the Belle~II detector at or near the and resonances, the cross sections for $(h=Ï/K…
Measurement of Born cross sections for at GeV
BESIII Collaboration, M. Ablikim, M. N. Achasov +758
We report a measurement of the Born cross section and the effective form factor for the reaction at 47 center-of-mass energies between 3.510 and 4.946 GeV. The…
Observation of and Measurement of Electromagnetic Form Factors of Proton at GeV
BESIII Collaboration, M. Ablikim, M. N. Achasov +758
We search for possible charmonium(-like) states decaying into the final state by studying the Born cross sections of the reaction, and we determine…