Mesonic weak decay spectrum of hypertriton HΛ3

2021 ◽  
Author(s):  
Ei Sandar Maung ◽  
Thida Wint ◽  
Khin Swe Myint ◽  
Yoshinori Akaishi
Keyword(s):  
Weak Decay ◽  
Decay Spectrum

scholarly journals Decay amplitudes to three hadrons from finite-volume matrix elements

2021 ◽  
Vol 2021 (4) ◽  
Author(s):  
Maxwell T. Hansen ◽  
Fernando Romero-López ◽  
Stephen R. Sharpe
Keyword(s):  
Finite Volume ◽  
Decay Amplitude ◽  
Weak Decay ◽  
Matrix Elements ◽  
Isospin Breaking ◽  
Final State ◽  
Identical Particles ◽  
Hadron Decay ◽  
Finite State ◽  
Particle Decays

Abstract We derive relations between finite-volume matrix elements and infinite-volume decay amplitudes, for processes with three spinless, degenerate and either identical or non-identical particles in the final state. This generalizes the Lellouch-Lüscher relation for two-particle decays and provides a strategy for extracting three-hadron decay amplitudes using lattice QCD. Unlike for two particles, even in the simplest approximation, one must solve integral equations to obtain the physical decay amplitude, a consequence of the nontrivial finite-state interactions. We first derive the result in a simplified theory with three identical particles, and then present the generalizations needed to study phenomenologically relevant three-pion decays. The specific processes we discuss are the CP-violating K → 3π weak decay, the isospin-breaking η → 3π QCD transition, and the electromagnetic γ* → 3π amplitudes that enter the calculation of the hadronic vacuum polarization contribution to muonic g − 2.

scholarly journals Dark matter spectra from the electroweak to the Planck scale

2021 ◽  
Vol 2021 (6) ◽  
Author(s):  
Christian W. Bauer ◽  
Nicholas L. Rodd ◽  
Bryan R. Webber
Keyword(s):  
Dark Matter ◽  
Standard Model ◽  
Symmetry Breaking ◽  
Planck Scale ◽  
Electroweak Symmetry Breaking ◽  
Indirect Detection ◽  
Electroweak Symmetry ◽  
Stable States ◽  
Decay Spectrum ◽  
Crucial Ingredient

Abstract We compute the decay spectrum for dark matter (DM) with masses above the scale of electroweak symmetry breaking, all the way to the Planck scale. For an arbitrary hard process involving a decay to the unbroken standard model, we determine the prompt distribution of stable states including photons, neutrinos, positrons, and antiprotons. These spectra are a crucial ingredient in the search for DM via indirect detection at the highest energies as being probed in current and upcoming experiments including IceCube, HAWC, CTA, and LHAASO. Our approach improves considerably on existing methods, for instance, we include all relevant electroweak interactions.

Experimental study of the decay spectrum of KLO → π+π−πO

1970 ◽  
Vol 32 (2) ◽  
pp. 133-136 ◽  
Author(s):  
R.C. Smith ◽  
L. Wang ◽  
M.C. Whatley ◽  
G.T. Zorn ◽  
J. Hornbostel
Keyword(s):  
Experimental Study ◽  
Decay Spectrum

Addendum to “Search for the weak decay of anHdibaryon”

1997 ◽  
Vol 56 (2) ◽  
pp. 1164-1164 ◽  
Author(s):  
J. Belz ◽  
R. D. Cousins ◽  
M. V. Diwan ◽  
M. Eckhause ◽  
K. M. Ecklund ◽  
...  
Keyword(s):  
Weak Decay

A superconductive measurement of the 187Re beta decay spectrum: preliminary results

2000 ◽  
Vol 87 (1-3) ◽  
pp. 493-494
Author(s):  
M.R. Gomes ◽  
T.A. Girard ◽  
C. Oliveira ◽  
V. Jeudy ◽  
D. Limagne
Keyword(s):  
Beta Decay ◽  
Decay Spectrum ◽  
Preliminary Results

scholarly journals Search for the H particle: Its production and weak decay

1992 ◽  
Vol 547 (1-2) ◽  
pp. 3-15 ◽  
Author(s):  
Peter D. Barnes
Keyword(s):  
Weak Decay

Using the η′ to understand the weak decay of charmed hadrons

1991 ◽  
Vol 259 (1-2) ◽  
pp. 135-138 ◽  
Author(s):  
Martin J. Savage
Keyword(s):  
Weak Decay
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