Recent results on bottomonium studies at Belle

2021 ◽  
pp. 2044018
Author(s):  
Alexey Garmash
Keyword(s):  
Energy Range ◽  
Center Of Mass ◽  
Mass Energy ◽  
Text Data ◽  
Center Of Mass Energy ◽  
Belle Detector ◽  
Scan Data

We review results of recent studies of transitions between bottomonium states obtained from analysis of the large [Formula: see text] data sample recorded by the Belle detector at various [Formula: see text]-resonances and energy scan data in the center-of-mass energy range from [Formula: see text] GeV to 11.02 GeV.

scholarly journals Study of the process $$e^+e^- \rightarrow \eta \pi ^0\gamma $$ in the energy range $$\sqrt{s} = {1.05-2.00}$$ GeV with the SND detector

2020 ◽  
Vol 80 (11) ◽  
Author(s):  
M. N. Achasov ◽  
A. Yu. Barnyakov ◽  
A. A. Baykov ◽  
K. I. Beloborodov ◽  
A. V. Berdyugin ◽  
...  
Keyword(s):  
Energy Range ◽  
Cross Section ◽  
Center Of Mass ◽  
Wide Energy Range ◽  
Mass Energy ◽  
Center Of Mass Energy ◽  
Wide Energy ◽  
Radiation Processes ◽  
Using Data ◽  
First Time

AbstractThe process $$e^+e^-\rightarrow \eta \pi ^0\gamma $$ e + e - → η π 0 γ is studied in the center-of-mass energy range 1.05–2.00 GeV using data with an integrated luminosity of 94.5 $$\hbox {pb}^{-1}$$ pb - 1 collected by the SND detector at the VEPP-2000 $$e^{+}e^{-}$$ e + e - collider. The $$e^+e^-\rightarrow \eta \pi ^0\gamma $$ e + e - → η π 0 γ cross section is measured for the first time. It is shown that the dominant mechanism of this reaction is the transition through the $$\omega \eta $$ ω η intermediate state. The measured cross section of the subprocess $$e^+e^-\rightarrow \omega \eta \rightarrow \eta \pi ^0\gamma $$ e + e - → ω η → η π 0 γ is consistent with previous measurements in the $$e^+e^-\rightarrow \pi ^+\pi ^-\pi ^0\eta $$ e + e - → π + π - π 0 η mode. It is found, with a significance of $$5.6\sigma $$ 5.6 σ , that the process $$e^+e^-\rightarrow \eta \pi ^0\gamma $$ e + e - → η π 0 γ is not completely described by hadronic vector-pseudoscalar intermediate states. The cross section of this missing contribution, which can originate from radiation processes, e. g. $$e^+e^-\rightarrow a_{0}(1450)\gamma $$ e + e - → a 0 ( 1450 ) γ , is measured. It is found to be 15–20 pb in the wide energy range from 1.3 to 1.9 GeV.

scholarly journals Study of the processe+e−→ηγin the center-of-mass energy range 1.07–2.00 GeV

2014 ◽  
Vol 90 (3) ◽  
Author(s):  
M. N. Achasov ◽  
V. M. Aulchenko ◽  
A. Yu. Barnyakov ◽  
K. I. Beloborodov ◽  
A. V. Berdyugin ◽  
...  
Keyword(s):  
Energy Range ◽  
Center Of Mass ◽  
Mass Energy ◽  
Center Of Mass Energy

scholarly journals Charm Meson Physics at BESIII

2018 ◽  
Vol 46 ◽  
pp. 1860063
Author(s):  
Lei Li
Keyword(s):  
Decay Constant ◽  
Phase Measurement ◽  
Center Of Mass ◽  
Form Factors ◽  
Mass Energy ◽  
Text Data ◽  
Strong Phase ◽  
Center Of Mass Energy ◽  
Plot Analysis ◽  
Mixing Parameter

Based on 2.93 fb[Formula: see text] data taken at the center-of-mass energy of [Formula: see text] GeV with the BESIII detector at the BEPCII collider, we report the precise measurements of the decay constant [Formula: see text], the form factors of [Formula: see text] semileptonic decays [Formula: see text] and [Formula: see text], the Dalitz plot analysis of [Formula: see text], the strong phase measurement in [Formula: see text] and the [Formula: see text] mixing parameter [Formula: see text].

scholarly journals An amplitude analysis of the process e+e-→ 4π in the center-of-mass energy range 900–2000 MeV with the CMD3 detector at the VEPP-2000 e+e- collider

2019 ◽  
Vol 212 ◽  
pp. 03008
Author(s):  
E. A. Kozyrev ◽  
R. R. Akhmetshin ◽  
A. N. Amirkhanov ◽  
A. V. Anisenkov ◽  
V. M. Aulchenko ◽  
...  
Keyword(s):  
Energy Range ◽  
Center Of Mass ◽  
Large Data ◽  
Mass Energy ◽  
Amplitude Analysis ◽  
Center Of Mass Energy

A large data sample of e+e-→ 4π collected by the CMD-3 experiment at the VEPP-2000 e+ e− collider allowed for an amplitude analysis of the process e+e−→ 4π in the center-of-mass energy range 900–2000 MeV. Various intermediate components were distinguished and dominance of the ωπ0 and a1π amplitudes has been proved.

scholarly journals Study of the process e+e−→K+K− in the center-of-mass energy range 1010–1060 MeV with the CMD-3 detector

2018 ◽  
Vol 779 ◽  
pp. 64-71 ◽  
Author(s):  
E.A. Kozyrev ◽  
E.P. Solodov ◽  
R.R. Akhmetshin ◽  
A.N. Amirkhanov ◽  
A.V. Anisenkov ◽  
...  
Keyword(s):  
Energy Range ◽  
Center Of Mass ◽  
Mass Energy ◽  
Center Of Mass Energy

scholarly journals Upgrade of the KEDR detector DAQ system

2020 ◽  
Vol 245 ◽  
pp. 01004
Author(s):  
Dmitriy Maximov ◽  
Alexey Talyshev ◽  
Alexander Ruban ◽  
Alexey Kozyrev
Keyword(s):  
Energy Range ◽  
Wide Spectrum ◽  
Center Of Mass ◽  
Decision Time ◽  
Mass Energy ◽  
Center Of Mass Energy ◽  
Data Transfers ◽  
Trigger Decision ◽  
High Level ◽  
Planned Activities

The KEDR experiment is ongoing at the VEPP-4M e+e− collider at Budker INP in Novosibirsk. The collider center of mass energy range covers a wide spectrum from 2 to 11 GeV. Most of the up-to-date statistics were taken at the lower end of the energy range around the charmonia region. Planned activities at greater energies up to the bottomonia would lead to a significant increase of event recording rates and accelerator backgrounds, thus stressing the existing DAQ and trigger systems beyond their limits. The described DAQ upgrade plan includes: the redesign of the trigger electronics using modern components to improve the trigger decision time; the development of new readout processors using ethernet connections; new software for collecting events and electronics management; high level of parallelization of data transfers and events processing; improved reliability based on readout computing cluster with redundancy. The upgraded DAQ system is going to be very flexible and could be considered as a concept prototype of the projected BINP Super Charm-Tau Factory.

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