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 Variation in rms charge radii of deuteron and helium nuclei with s\sqrt s

Nukleonika ◽  
2020 ◽  
Vol 65 (4) ◽  
pp. 211-215
Author(s):  
Sarwat Zahra ◽  
Bushra Shafaq ◽  
Bushra Kanwal ◽  
Nosheen Akbar
Keyword(s):  
Center Of Mass ◽  
Form Factors ◽  
Mass Energy ◽  
Charge Radii ◽  
Center Of Mass Energy ◽  
Theoretical Predictions ◽  
Dependent Form ◽  
Energy Dependent ◽  
The Relationship ◽  
Good Agreement

AbstractBy considering energy-dependent form factors extracted from generalized Chou–Yang model, root mean square (rms) charge radii of deuteron and helium nuclei (alpha) are predicted at different values of center of mass energy which are in good agreement with theoretical predictions and experimental results. The rms radius is inversely proportional to mass of nuclei. Besides, the relationship between radii and energy are also derived.

scholarly journals CHARM PHYSICS AT BESIII

2014 ◽  
Vol 35 ◽  
pp. 1460412
Author(s):  
GUANG ZHAO ◽  
Keyword(s):  
Dalitz Plot ◽  
Decay Constant ◽  
Rare Decay ◽  
Form Factors ◽  
Charm Physics ◽  
Text Search ◽  
Strong Phase ◽  
Plot Analysis ◽  
Selection Of

We present a selection of recent charm results from the BESIII Collaboration. The topics include measurements of strong phase in D0 → Kπ decay and yCP, decay constant fD+ measurement from D+ → μ+ν, form-factors measurement in D0 → K−e+ν, π−e+ν, Dalitz plot analysis of [Formula: see text], search for D0 → γγ rare decay and Ds decays.

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 Search for the rare semi-leptonic decay J/ψ → D−e+νe + c.c.

2021 ◽  
Vol 2021 (6) ◽  
Author(s):  
◽  
M. Ablikim ◽  
M. N. Achasov ◽  
P. Adlarson ◽  
S. Ahmed ◽  
...  
Keyword(s):  
Confidence Level ◽  
Branching Fraction ◽  
Center Of Mass ◽  
Leptonic Decay ◽  
Mass Energy ◽  
Center Of Mass Energy ◽  
Upper Limit ◽  
Electron Positron

Abstract Using 10.1 × 109J/ψ events produced by the Beijing Electron Positron Collider (BEPCII) at a center-of-mass energy $$ \sqrt{s} $$ s = 3.097 GeV and collected with the BESIII detector, we present a search for the rare semi-leptonic decay J/ψ → D−e+νe + c.c. No excess of signal above background is observed, and an upper limit on the branching fraction ℬ(J/ψ → D−e+νe + c. c.) < 7.1 × 10−8 is obtained at 90% confidence level. This is an improvement of more than two orders of magnitude over the previous best limit.

scholarly journals Measuring the quartic Higgs self-coupling at a multi-TeV muon collider

2020 ◽  
Vol 2020 (9) ◽  
Author(s):  
M. Chiesa ◽  
F. Maltoni ◽  
L. Mantani ◽  
B. Mele ◽  
F. Piccinini ◽  
...  
Keyword(s):  
Higgs Boson ◽  
Center Of Mass ◽  
Mass Energy ◽  
Simple Analysis ◽  
Proton Proton ◽  
Coupling Interaction ◽  
Center Of Mass Energy ◽  
Muon Collider ◽  
Better Than

Abstract Measuring the shape of the Higgs boson potential is of paramount importance, and will be a challenging task at current as well as future colliders. While the expectations for the measurement of the trilinear Higgs self-coupling are rather promising, an accurate measurement of the quartic self-coupling interaction is presently considered extremely challenging even at a future 100 TeV proton-proton collider. In this work we explore the sensitivity that a muon collider with a center of mass energy in the multi-TeV range and luminosities of the order of 1035cm−2s−1, as presently under discussion, might provide, thanks to a rather large three Higgs-boson production and to a limited background. By performing a first and simple analysis, we find a clear indication that a muon collider could provide a determination of the quartic Higgs self-coupling that is significantly better than what is currently considered attainable at other future colliders.

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