scholarly journals New limits on light scalar and pseudoscalar particles produced in nuclear decay

1988 ◽  
Vol 37 (5) ◽  
pp. 1134-1141 ◽  
Author(s):  
M. J. Savage ◽  
B. W. Filippone ◽  
L. W. Mitchell
Keyword(s):  
Nuclear Decay ◽  
Light Scalar

Search for a Light Scalar Boson Emitted in Nuclear Decay

1984 ◽  
Vol 52 (4) ◽  
pp. 240-243 ◽  
Author(s):  
S. J. Freedman ◽  
J. Napolitano ◽  
J. Camp ◽  
M. Kroupa
Keyword(s):  
Scalar Boson ◽  
Nuclear Decay ◽  
Light Scalar

scholarly journals A cosmic microscope for the preheating era

2021 ◽  
Vol 2021 (1) ◽  
Author(s):  
JiJi Fan ◽  
Zhong-Zhi Xianyu
Keyword(s):  
Scalar Field ◽  
Nonlinear Effect ◽  
Large Scale ◽  
Nonlinear Effects ◽  
Light Fields ◽  
Unique Probe ◽  
Light Scalar ◽  
Spatially Varying ◽  
Near Future ◽  
Scalar Perturbations

Abstract Light fields with spatially varying backgrounds can modulate cosmic preheating, and imprint the nonlinear effects of preheating dynamics at tiny scales on large scale fluctuations. This provides us a unique probe into the preheating era which we dub the “cosmic microscope”. We identify a distinctive effect of preheating on scalar perturbations that turns the Gaussian primordial fluctuations of a light scalar field into square waves, like a diode. The effect manifests itself as local non-Gaussianity. We present a model, “modulated partial preheating”, where this nonlinear effect is consistent with current observations and can be reached by near future cosmic probes.

scholarly journals Gamma Spectrum Measurement Following the Nuclear Decay

2021 ◽  
Vol 1739 ◽  
pp. 012035
Author(s):  
Shuifa Shen ◽  
Feipeng Wang ◽  
Yupeng Yan ◽  
Jiejie Shen ◽  
Yan Li ◽  
...  
Keyword(s):  
Gamma Spectrum ◽  
Nuclear Decay ◽  
Spectrum Measurement

Half-lives of spherical proton emitters within the framework of fractional calculus

2014 ◽  
Vol 23 (09) ◽  
pp. 1450044 ◽  
Author(s):  
Abdullah Engin Çalik ◽  
Hüseyin Şirin ◽  
Hüseyin Ertik ◽  
Buket Öder ◽  
Mürsel Şen
Keyword(s):  
Fractional Calculus ◽  
Fractional Derivative ◽  
Nuclear Structure ◽  
Caputo Fractional Derivative ◽  
Half Life ◽  
Nuclear Decay ◽  
Life Values ◽  
Derivative Order

In this paper, the half-life values of spherical proton emitters such as Sb , Tm , Lu , Ta , Re , Ir , Au , Tl and Bi have been calculated within the framework of fractional calculus. Nuclear decay equation, related to this phenomenon, has been resolved by using Caputo fractional derivative. The order of fractional derivative μ being considered is 0 < μ ≤ 1, and characterizes the fractality of time. Half-life values have been calculated equivalent with empirical ones. The dependence of fractional derivative order μ on the nuclear structure has also been investigated.

Nuclear Decay ofBr84and the Level Scheme inKr84

1957 ◽  
Vol 108 (1) ◽  
pp. 82-90 ◽  
Author(s):  
Noah R. Johnson ◽  
G. D. O'Kelley
Keyword(s):  
Level Scheme ◽  
Nuclear Decay

scholarly journals Dark scalars and heavy neutral leptons at DarkQuest

2021 ◽  
Vol 2021 (5) ◽  
Author(s):  
Brian Batell ◽  
Jared A. Evans ◽  
Stefania Gori ◽  
Mudit Rai
Keyword(s):  
Particle Production ◽  
Meson Production ◽  
Gluon Fusion ◽  
New Physics ◽  
Dark Sector ◽  
Hidden Sector ◽  
Detector Acceptance ◽  
Light Scalar ◽  
Near Term

Abstract The proposed DarkQuest beam dump experiment, a modest upgrade to the existing SeaQuest/SpinQuest experiment, has great potential for uncovering new physics within a dark sector. We explore both the near-term and long-term prospects for observing two distinct, highly-motivated hidden sector benchmark models: heavy neutral leptons and Higgs-mixed scalars. We comprehensively examine the particle production and detector acceptance at DarkQuest, including an updated treatment of meson production, and light scalar production through both bremsstrahlung and gluon-gluon fusion. In both benchmark models, DarkQuest will provide an opportunity to probe previously inaccessible interesting regions of parameter space on a fairly short timescale when compared to other proposed experiments.

scholarly journals Further Evidence Suggestive of a Solar Influence on Nuclear Decay Rates

Solar Physics ◽  
2011 ◽  
Vol 272 (1) ◽  
pp. 1-10 ◽  
Author(s):  
P. A. Sturrock ◽  
E. Fischbach ◽  
J. H. Jenkins
Keyword(s):  
Decay Rates ◽  
Nuclear Decay ◽  
Solar Influence
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