scholarly journals Composite solution to the neutron lifetime anomaly

2021 ◽  
Vol 103 (3) ◽  
Author(s):  
Surjeet Rajendran ◽  
Harikrishnan Ramani
Keyword(s):  
Neutron Lifetime ◽  
Composite Solution

scholarly journals Space-based measurement of the neutron lifetime using data from the neutron spectrometer on NASA's MESSENGER mission

2020 ◽  
Vol 2 (2) ◽  
Author(s):  
Jack T. Wilson ◽  
David J. Lawrence ◽  
Patrick N. Peplowski ◽  
Vincent R. Eke ◽  
Jacob A. Kegerreis
Keyword(s):  
Neutron Lifetime ◽  
Neutron Spectrometer ◽  
Using Data

scholarly journals Corrections of order O(Ee2∕mN2), caused by weak magnetism and proton recoil, to the neutron lifetime and correlation coefficients of the neutron beta decay

2021 ◽  
pp. 103806
Author(s):  
A.N. Ivanov ◽  
R. Höllwieser ◽  
N.I. Troitskaya ◽  
M. Wellenzohn ◽  
Ya.A. Berdnikov
Keyword(s):  
Beta Decay ◽  
Correlation Coefficients ◽  
Neutron Lifetime ◽  
Neutron Beta Decay ◽  
Weak Magnetism ◽  
Proton Recoil

Precise measurement of neutron lifetime

2021 ◽  
Author(s):  
Ankita Anirban
Keyword(s):  
Precise Measurement ◽  
Neutron Lifetime

scholarly journals Quasielastic scattering in the interaction of ultracold neutrons with a liquid wall and application in a reanalysis of the Mambo I neutron-lifetime experiment

2012 ◽  
Vol 85 (6) ◽  
Author(s):  
A. Steyerl ◽  
J. M. Pendlebury ◽  
C. Kaufman ◽  
S. S. Malik ◽  
A. M. Desai
Keyword(s):  
Ultracold Neutrons ◽  
Quasielastic Scattering ◽  
Neutron Lifetime ◽  
Liquid Wall

Magnetic storage of UCN for a measurement of the neutron lifetime

2009 ◽  
Vol 611 (2-3) ◽  
pp. 167-170 ◽  
Author(s):  
V.F. Ezhov ◽  
A.Z. Andreev ◽  
G. Ban ◽  
B.A. Bazarov ◽  
P. Geltenbort ◽  
...  
Keyword(s):  
Magnetic Storage ◽  
Neutron Lifetime

Neutron tunneling and neutron lifetime in a NiVNi Fabry-Perot thin film resonator

1996 ◽  
Vol 223 (3) ◽  
pp. 145-148 ◽  
Author(s):  
M. Mâaza ◽  
B. Pardo ◽  
J.P. Chauvineau ◽  
A. Raynal ◽  
A. Menelle ◽  
...  
Keyword(s):  
Thin Film ◽  
Neutron Lifetime ◽  
Fabry Perot

Resolving the neutron lifetime puzzle

Science ◽  
2018 ◽  
Vol 360 (6389) ◽  
pp. 605-606 ◽  
Author(s):  
Pieter Mumm
Keyword(s):  
Neutron Lifetime

scholarly journals Characterization of Electrical Heating Textile Coated by Graphene Nanoplatelets/PVDF-HFP Composite with Various High Graphene Nanoplatelet Contents

Polymers ◽  
2019 ◽  
Vol 11 (5) ◽  
pp. 928 ◽  
Author(s):  
Hyelim Kim ◽  
Sunhee Lee
Keyword(s):  
Sheet Resistance ◽  
Cotton Fabric ◽  
Electrical Heating ◽  
Coated Sample ◽  
Graphene Nanoplatelet ◽  
Pattern Type ◽  
Heating Performance ◽  
Composite Solution ◽  
Coated Cotton ◽  
Conductive Yarn

We prepared a horseshoe-pattern type electrical heating textile that was coated with high graphene nanoplatelet (GNP) content (32 wt% to 64 wt%) of graphene nanoplatelet/poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) composite. Silver-coated conductive yarn is used as electrode in the sample to improve its flexibility and applicability as wearable textile. These graphene nanoplatelet/PVDF-HFP coated samples with various high-contents of graphene were characterized using scanning electron microscopy (SEM), thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), X-ray diffraction (XRD), sheet resistance analysis, and electrical heating performance analysis. Graphene nanoplatelet/PVDF-HFP coated cotton fabric improved the crystallinity and thermal stability with increasing thw high-content of GNP. With an increasing of the high-content of graphene nanoplatelet in the PVDF-HFP composite solution, the sheet resistance of samples tended to gradually decrease. That of, 64 wt% graphene nanoplatelet/PVDF-HFP composite coated sample (64 GR/cotton) was 44 Ω/sq. The electrical heating performance of graphene nanoplatelet/PVDF-HFP composite coated cotton fabric was improved with increasing the high-content of graphene nanoplatelet. When 5 V was applied to 64 GR/cotton, its surface temperature has been indicated to be about 48 °C and it could be used at a low voltage (<10 V). Thus, a horseshoe-pattern type electrical heating textile that is coated by high content of graphene nanoplatelet/PVDF-HFP composite solution sewn with silver-coated conductive yarn is expected to be applied to glove, shoes, jacket, and so on to improve its wearability and applicability.

scholarly journals A meta-analysis of neutron lifetime measurements

2020 ◽  
Vol 2020 (1) ◽  
Author(s):  
Ashwani Rajan ◽  
Shantanu Desai
Keyword(s):  
Gaussian Distribution ◽  
Meta Analysis ◽  
Cauchy Distribution ◽  
Neutron Lifetime ◽  
Weighted Mean ◽  
Lifetime Measurements ◽  
Median Estimate ◽  
Error Distributions ◽  
Student’S T ◽  
Data Group

Abstract We calculate the median as well as weighted mean central estimates for the neutron lifetime from a subset of measurements compiled in the 2019 update of the Particle Data Group (PDG). We then reconstruct the error distributions for the residuals using three different central estimates and then check for consistency with a Gaussian distribution. We find that although the error distributions using the weighted mean as well as median estimate are consistent with a Gaussian distribution, the Student’s $t$ and Cauchy distribution provide a better fit. This median statistic estimate of the neutron lifetime from these measurements is given by $881.5 \pm 0.47$ seconds. This can be used as an alternate estimate of the neutron lifetime. We also note that the discrepancy between beam and bottle-based measurements using median statistics of the neutron lifetime persists with a significance between 4 $\sigma$ and 8 $\sigma$, depending on which combination of measurements is used.

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