scholarly journals Neutron lifetime measurements using gravitationally trapped ultracold neutrons

2008 ◽  
Vol 78 (3) ◽  
Author(s):  
A. P. Serebrov ◽  
V. E. Varlamov ◽  
A. G. Kharitonov ◽  
A. K. Fomin ◽  
Yu. N. Pokotilovski ◽  
...  
Keyword(s):  
Ultracold Neutrons ◽  
Neutron Lifetime ◽  
Lifetime Measurements

scholarly journals Neutron lifetime measurements with a large gravitational trap for ultracold neutrons

2018 ◽  
Vol 97 (5) ◽  
Author(s):  
A. P. Serebrov ◽  
E. A. Kolomensky ◽  
A. K. Fomin ◽  
I. A. Krasnoshchekova ◽  
A. V. Vassiljev ◽  
...  
Keyword(s):  
Ultracold Neutrons ◽  
Neutron Lifetime ◽  
Lifetime Measurements

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.

scholarly journals Neutron lifetime measurement with the big gravitational trap for ultracold neutrons. Current state and future prospects.

2019 ◽  
Vol 1390 ◽  
pp. 012136
Author(s):  
A P Serebrov ◽  
E A Kolomensky ◽  
A K Fomin ◽  
I A Krasnoschekova ◽  
A V Vassiljev ◽  
...  
Keyword(s):  
Lifetime Measurement ◽  
Ultracold Neutrons ◽  
Future Prospects ◽  
Neutron Lifetime ◽  
Current State

Results of Neutron Lifetime Measurements with Gravitational UCN Trap

1991 ◽  
Author(s):  
V. P. Gudkov ◽  
A. G. Kharitonov ◽  
V. V. Nesvizhevsky ◽  
A. P. Serebrov ◽  
S. O. Sumbaev ◽  
...  
Keyword(s):  
Neutron Lifetime ◽  
Lifetime Measurements

scholarly journals A measurement of the neutron lifetime using the method of storage of ultracold neutrons and detection of inelastically up-scattered neutrons

2015 ◽  
Vol 745 ◽  
pp. 79-89 ◽  
Author(s):  
S. Arzumanov ◽  
L. Bondarenko ◽  
S. Chernyavsky ◽  
P. Geltenbort ◽  
V. Morozov ◽  
...  
Keyword(s):  
Ultracold Neutrons ◽  
Neutron Lifetime ◽  
Scattered Neutrons

MAGNETIC TRAPPING OF ULTRACOLD NEUTRONS: PROSPECTS FOR AN IMPROVED MEASUREMENT OF THE NEUTRON LIFETIME

2001 ◽  
Author(s):  
P. R. HUFFMAN ◽  
A. K. THOMPSON ◽  
F. E. WIETFELDT ◽  
G. L. YANO ◽  
K. J. ALVINE ◽  
...  
Keyword(s):  
Ultracold Neutrons ◽  
Magnetic Trapping ◽  
Neutron Lifetime
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