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Measurement of the neutron lifetime using a magneto-gravitational trap and in situ detection

Pattie, Jr, R W ; Callahan, N B ; Cude-Woods, C ; Adamek, E R ; Broussard, L J ; Clayton, S M ; Currie, S A ; Dees, E B ; Ding, X ; Engel, E M ; Fellers, D E ; Fox, W ; Geltenbort, P ; Hickerson, K P ; Hoffbauer, M A ; Holley, A T ; Komives, A ; Liu, C-Y ; MacDonald, S W T ; Makela, M ; Morris, C L ; Ortiz, J D ; Ramsey, J ; Salvat, D J ; Saunders, A ; Seestrom, S J ; Sharapov, E I ; Sjue, S K ; Tang, Z ; Vanderwerp, J ; Vogelaar, B ; Walstrom, P L ; Wang, Z ; Wei, W ; Weaver, H L ; Wexler, J W ; Womack, T L ; Young, A R ; Zeck, B A

Science (American Association for the Advancement of Science), 2018-05, Vol.360 (6389), p.627-632 [Periódico revisado por pares]

United States: The American Association for the Advancement of Science

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Título:
Measurement of the neutron lifetime using a magneto-gravitational trap and in situ detection
Autor: Pattie, Jr, R W ; Callahan, N B ; Cude-Woods, C ; Adamek, E R ; Broussard, L J ; Clayton, S M ; Currie, S A ; Dees, E B ; Ding, X ; Engel, E M ; Fellers, D E ; Fox, W ; Geltenbort, P ; Hickerson, K P ; Hoffbauer, M A ; Holley, A T ; Komives, A ; Liu, C-Y ; MacDonald, S W T ; Makela, M ; Morris, C L ; Ortiz, J D ; Ramsey, J ; Salvat, D J ; Saunders, A ; Seestrom, S J ; Sharapov, E I ; Sjue, S K ; Tang, Z ; Vanderwerp, J ; Vogelaar, B ; Walstrom, P L ; Wang, Z ; Wei, W ; Weaver, H L ; Wexler, J W ; Womack, T L ; Young, A R ; Zeck, B A
Assuntos: Astronomical models ; Atomic and Nuclear Physics ; Big bang cosmology ; Containers ; Cosmology ; Gravity ; Helium ; Helium atoms ; High Energy Physics - Experiment ; Magnetic fields ; Neutron counters ; Neutrons ; Nuclear Experiment ; Nuclear Theory ; Nuclei ; Nuclei (nuclear physics) ; Particle physics ; Physics ; PHYSICS OF ELEMENTARY PARTICLES AND FIELDS ; Protons ; Standard model (particle physics) ; Universe ; Walls
É parte de: Science (American Association for the Advancement of Science), 2018-05, Vol.360 (6389), p.627-632
Notas: ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
FG02-97ER41042; AC05-00OR22725; AC52-06NA25396; 20140568DR; 8215; 130692; 1307426; 161454; 1306997; 1553861
National Science Foundation (NSF)
USDOE Office of Science (SC), Nuclear Physics (NP)
USDOE Laboratory Directed Research and Development (LDRD) Program
National Institute of Standards and Technology (NIST)
LA-UR-17-24449
Descrição: The precise value of the mean neutron lifetime, τ , plays an important role in nuclear and particle physics and cosmology. It is used to predict the ratio of protons to helium atoms in the primordial universe and to search for physics beyond the Standard Model of particle physics. We eliminated loss mechanisms present in previous trap experiments by levitating polarized ultracold neutrons above the surface of an asymmetric storage trap using a repulsive magnetic field gradient so that the stored neutrons do not interact with material trap walls. As a result of this approach and the use of an in situ neutron detector, the lifetime reported here [877.7 ± 0.7 (stat) +0.4/-0.2 (sys) seconds] does not require corrections larger than the quoted uncertainties.
Editor: United States: The American Association for the Advancement of Science
Idioma: Inglês

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Measurement of the neutron lifetime using a magneto-gravitational trap and in situ detection

United States: The American Association for the Advancement of Science

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