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Improved Neutron Lifetime Measurement with UCNτ.
Gonzalez, F M; Fries, E M; Cude-Woods, C; Bailey, T; Blatnik, M; Broussard, L J; Callahan, N B; Choi, J H; Clayton, S M; Currie, S A; Dawid, M; Dees, E B; Filippone, B W; Fox, W; Geltenbort, P; George, E; Hayen, L; Hickerson, K P; Hoffbauer, M A; Hoffman, K; Holley, A T; Ito, T M; Komives, A; Liu, C-Y; Makela, M; Morris, C L; Musedinovic, R; O'Shaughnessy, C; Pattie, R W; Ramsey, J; Salvat, D J; Saunders, A; Sharapov, E I; Slutsky, S; Su, V; Sun, X; Swank, C; Tang, Z; Uhrich, W; Vanderwerp, J; Walstrom, P; Wang, Z; Wei, W; Young, A R.
Afiliação
  • Gonzalez FM; Department of Physics, Indiana University, Bloomington, Indiana 47405, USA.
  • Fries EM; Center for Exploration of Energy and Matter, Indiana University, Bloomington, Indiana 47405, USA.
  • Cude-Woods C; Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA.
  • Bailey T; Kellogg Radiation Laboratory, California Institute of Technology, Pasadena, California 91125, USA.
  • Blatnik M; Department of Physics, North Carolina State University, Raleigh, North Carolina 27695, USA.
  • Broussard LJ; Triangle Universities Nuclear Laboratory, Durham, North Carolina 27708, USA.
  • Callahan NB; Department of Physics, North Carolina State University, Raleigh, North Carolina 27695, USA.
  • Choi JH; Triangle Universities Nuclear Laboratory, Durham, North Carolina 27708, USA.
  • Clayton SM; Kellogg Radiation Laboratory, California Institute of Technology, Pasadena, California 91125, USA.
  • Currie SA; Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA.
  • Dawid M; Argonne National Laboratory, Lemont, Illinois 60439, USA.
  • Dees EB; Department of Physics, North Carolina State University, Raleigh, North Carolina 27695, USA.
  • Filippone BW; Triangle Universities Nuclear Laboratory, Durham, North Carolina 27708, USA.
  • Fox W; Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
  • Geltenbort P; Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
  • George E; Department of Physics, Indiana University, Bloomington, Indiana 47405, USA.
  • Hayen L; Center for Exploration of Energy and Matter, Indiana University, Bloomington, Indiana 47405, USA.
  • Hickerson KP; Department of Physics, North Carolina State University, Raleigh, North Carolina 27695, USA.
  • Hoffbauer MA; Triangle Universities Nuclear Laboratory, Durham, North Carolina 27708, USA.
  • Hoffman K; Kellogg Radiation Laboratory, California Institute of Technology, Pasadena, California 91125, USA.
  • Holley AT; Department of Physics, Indiana University, Bloomington, Indiana 47405, USA.
  • Ito TM; Center for Exploration of Energy and Matter, Indiana University, Bloomington, Indiana 47405, USA.
  • Komives A; Institut Laue-Langevin, CS 20156, 38042 Grenoble Cedex 9, France.
  • Liu CY; Tennessee Technological University, Cookeville, Tennessee 38505, USA.
  • Makela M; Department of Physics, North Carolina State University, Raleigh, North Carolina 27695, USA.
  • Morris CL; Triangle Universities Nuclear Laboratory, Durham, North Carolina 27708, USA.
  • Musedinovic R; Kellogg Radiation Laboratory, California Institute of Technology, Pasadena, California 91125, USA.
  • O'Shaughnessy C; Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
  • Pattie RW; Tennessee Technological University, Cookeville, Tennessee 38505, USA.
  • Ramsey J; Tennessee Technological University, Cookeville, Tennessee 38505, USA.
  • Salvat DJ; Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
  • Saunders A; DePauw University, Greencastle, Indiana 46135, USA.
  • Sharapov EI; Department of Physics, Indiana University, Bloomington, Indiana 47405, USA.
  • Slutsky S; Center for Exploration of Energy and Matter, Indiana University, Bloomington, Indiana 47405, USA.
  • Su V; Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
  • Sun X; Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
  • Swank C; Department of Physics, North Carolina State University, Raleigh, North Carolina 27695, USA.
  • Tang Z; Triangle Universities Nuclear Laboratory, Durham, North Carolina 27708, USA.
  • Uhrich W; Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
  • Vanderwerp J; East Tennessee State University, Johnson City, Tennessee 37614, USA.
  • Walstrom P; Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA.
  • Wang Z; Department of Physics, Indiana University, Bloomington, Indiana 47405, USA.
  • Wei W; Center for Exploration of Energy and Matter, Indiana University, Bloomington, Indiana 47405, USA.
  • Young AR; Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA.
Phys Rev Lett ; 127(16): 162501, 2021 Oct 15.
Article em En | MEDLINE | ID: mdl-34723594
ABSTRACT
We report an improved measurement of the free neutron lifetime τ_{n} using the UCNτ apparatus at the Los Alamos Neutron Science Center. We count a total of approximately 38×10^{6} surviving ultracold neutrons (UCNs) after storing in UCNτ's magnetogravitational trap over two data acquisition campaigns in 2017 and 2018. We extract τ_{n} from three blinded, independent analyses by both pairing long and short storage time runs to find a set of replicate τ_{n} measurements and by performing a global likelihood fit to all data while self-consistently incorporating the ß-decay lifetime. Both techniques achieve consistent results and find a value τ_{n}=877.75±0.28_{stat}+0.22/-0.16_{syst} s. With this sensitivity, neutron lifetime experiments now directly address the impact of recent refinements in our understanding of the standard model for neutron decay.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Phys Rev Lett Ano de publicação: 2021 Tipo de documento: Article País de afiliação: Estados Unidos
Texto completo
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XML
PubMed Links
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Phys Rev Lett Ano de publicação: 2021 Tipo de documento: Article País de afiliação: Estados Unidos