scholarly journals Updated BBN constraints on electromagnetic decays of MeV-scale particles

2021 ◽  
Vol 2021 (04) ◽  
pp. 011
Author(s):  
Paul Frederik Depta ◽  
Marco Hufnagel ◽  
Kai Schmidt-Hoberg
Keyword(s):  
Electromagnetic Decays

Electromagnetic decays of excited hyperons

1991 ◽  
Vol 529 (4) ◽  
pp. 713-726 ◽  
Author(s):  
Y. Umino ◽  
F. Myhrer
Keyword(s):  
Electromagnetic Decays

Remarks on the electromagnetic decays of the neutral pion

2021 ◽  
pp. 2150123
Author(s):  
Stanley A. Bruce
Keyword(s):  
Chiral Symmetry ◽  
Neutral Pion ◽  
Classical Electrodynamics ◽  
Dirac Field ◽  
Electromagnetic Decays

We propose a simple classical electrodynamics model in which a Lorentz pseudoscalar field and a Dirac field are present in the general Lagrangian of the system. The model is constructed by allowing explicit violation of chiral symmetry. This approach is intended to predict possible electromagnetic decays of the neutral pion in effective terms.

scholarly journals BBN constraints on MeV-scale dark sectors. Part II: Electromagnetic decays

2018 ◽  
Vol 2018 (11) ◽  
pp. 032-032 ◽  
Author(s):  
Marco Hufnagel ◽  
Kai Schmidt-Hoberg ◽  
Sebastian Wild
Keyword(s):  
Electromagnetic Decays

scholarly journals Production and electromagnetic decay of hyperons: a feasibility study with HADES as a phase-0 experiment at FAIR

2021 ◽  
Vol 57 (4) ◽  
Author(s):  
J. Adamczewski-Musch ◽  
◽  
A. Belyaev ◽  
A. Blanco ◽  
C. Blume ◽  
...  
Keyword(s):  
Kinetic Energy ◽  
Feasibility Study ◽  
Cross Sections ◽  
Production Cross ◽  
Electromagnetic Decay ◽  
Electromagnetic Decays ◽  
Detector Acceptance ◽  
Phase 0 ◽  
Forward Detector ◽  
Expected Signal

AbstractA feasibility study has been performed in order to investigate the performance of the HADES  detector to measure the electromagnetic decays of the hyperon resonances $$\Sigma (1385)^{0}$$ Σ ( 1385 ) 0 ,  $$\Lambda (1405)$$ Λ ( 1405 )   and $$\Lambda (1520)$$ Λ ( 1520 )   as well as the production of double strange baryon systems $$\Xi ^{-}$$ Ξ -  and $$\Lambda $$ Λ $$\Lambda $$ Λ  in p + p reactions at a beam kinetic energy of $$4.5\,{\mathrm{GeV}}$$ 4.5 GeV . The existing HADES  detector will be upgraded by a new Forward Detector, which extends the detector acceptance into a range of polar angles that plays a crucial role for these investigations. The analysis of each channel is preceded by a consideration of the production cross-sections. Afterwards the expected signal count rates using a target consisting of either liquid hydrogen or polyethylene are summarized.

Polarizabilities and electromagnetic decays of hyperons in the bound state soliton model

1997 ◽  
Author(s):  
Carlos L. Schat ◽  
Carlo Gobbi ◽  
Norberto N. Scoccola
Keyword(s):  
Bound State ◽  
Soliton Model ◽  
Electromagnetic Decays

Weak Electromagnetic Decays of Hyperons inSU(3)

1965 ◽  
Vol 140 (4B) ◽  
pp. B1144-B1150 ◽  
Author(s):  
R. H. Graham ◽  
S. Pakvasa
Keyword(s):  
Electromagnetic Decays

HYPERFINE MIXING IN b → c SEMILEPTONIC AND ELECTROMAGNETIC DECAYS OF DOUBLY HEAVY bc BARYONS

2014 ◽  
Vol 26 ◽  
pp. 1460107
Author(s):  
C. ALBERTUS ◽  
E. HERNÁNDEZ ◽  
J. NIEVES
Keyword(s):  
Heavy Quark ◽  
Quark Mass ◽  
Semileptonic Decay ◽  
Spin Symmetry ◽  
Mass Limit ◽  
Electromagnetic Decays ◽  
Heavy Quark Mass ◽  
Quark Spin ◽  
Heavy Quark Spin Symmetry ◽  
Symmetry Relations

We show that semileptonic and electromagnetic decays involving spin-1/2 doubly heavy bc baryons are very sensitive to hyperfine mixing in their wave functions. We further show how heavy quark spin symmetry relations, obtained in the infinite heavy quark mass limit and near zero recoil, could be used to extract the admixtures in a model independent way from semileptonic decay data. On the other hand the infinite heavy quark mass limit gives wrong predictions in the electromagnetic case.

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