/ Experiment-HEP


Status of the NPDGamma experiment


Fry, J. (Virginia U.) ; Alarcon, R. (Arizona State U.) ; Allen, R. (Oak Ridge) ; Askanazi, E. (Virginia U.) ; Balascuta, S. (Arizona State U.) ; Barron-Palos, L. (Mexico U.) ; Baeßler, S. (Virginia U.) ; Barzilov, A. (Nevada U., Las Vegas) ; Blessinger, C. (Oak Ridge) ; Blyth, D. (Arizona State U.) ; Bowman, J.D. (Oak Ridge) ; Calarco, J.R. (UNH, Durham) ; Chupp, T.E. (Michigan U.) ; Coppola, C.E. (Tennessee U.) ; Crawford, C. (Kentucky U.) ; Craycraft, K. (Kentucky U.) ; Dabaghyan, M. (UNH, Durham) ; Evans, D. (Virginia U.) ; Favela, J. (Mexico U.) ; Fieseler, C. (Kentucky U.) ; Fomin, N. (Tennessee U.) ; Fox, W. (Indiana U., Bloomington (main)) ; Freedman, S. (LBL, Berkeley) ; Frlež, E. (Virginia U.) ; Fu, C. (Indiana U., Bloomington (main)) ; Garcia, C. (Mexico U.) ; Garishvili, I. (Tennessee U.) ; Gericke, M.T. (Manitoba U.) ; Gillis, R.C. (Oak Ridge) ; Grammer, K. (Tennessee U.) ; Greene, G.L. (Tennessee U.) ; Hamblen, J. (U. Tennessee, Chattanooga) ; Hayes, C. (Tennessee U.) ; Hersman, F.W. (UNH, Durham) ; Ino, T. (KEK, Tanashi) ; Iverson, E.B. (Oak Ridge) ; Jones, G.L. (Hamilton Coll.) ; Kabir, L. (Kentucky U.) ; Kucucker, S. (Tennessee U.) ; Lauss, B. (PSI, Villigen) ; Li, Y. (SINAP, Shanghai) ; Mahurin, R. (Manitoba U.) ; Maldonado-Velazquez, M. (Mexico U.) ; McCrea, M. (Manitoba U.) ; Masuda, Y. (KEK, Tanashi) ; Mei, J. (Indiana U., Bloomington (main)) ; Milburn, R. (Kentucky U.) ; Mitchell, G.S. (UC, Davis) ; Mueller, P. (Oak Ridge) ; Muto, S. (KEK, Tanashi) ; Musgrave, M. (Tennessee U.) ; Nann, H. (Indiana U., Bloomington (main)) ; Novikov, I. (Western Kentucky U.) ; Page, S. (Manitoba U.) ; Parsons, D. (U. Tennessee, Chattanooga) ; Počanić, D. (Virginia U.) ; Penttilä, S.I. (Oak Ridge) ; Ramsay, W.D. (TRIUMF) ; Salas-Bacci, A. (Virginia U.) ; Santra, S. (Bhabha Atomic Res. Ctr.) ; Seo, P.N. (Duke U.) ; Sharapov, E. (Dubna, JINR) ; Sharma, M. (Michigan U.) ; Simmons, F. (Kentucky U.) ; Smith, T. (Dayton U.) ; Snow, W.M. (Indiana U., Bloomington (main)) ; Stuart, J. (U. Tennessee, Chattanooga) ; Tang, E. (Kentucky U.) ; Tang, Z. (Los Alamos) ; Thomison, J. (Oak Ridge) ; Tong, T. (Oak Ridge) ; Vanderwerp, J. (Indiana U., Bloomington (main)) ; Waldecker, S. (U. Tennessee, Chattanooga) ; Wilburn, W.S. (Los Alamos) ; Xu, W. (SINAP, Shanghai) ; Yuan, V. (Los Alamos) ; Zhang, Y. (Lanzhou U.)

Published in: Hyperfine Interact.
Year: 2017
Vol.: 238    Num./Issue: 1
Page No: 11
Year: 2016-12-27 published

Abstract: The NPDGamma experiment measures the parity-violating (PV) gamma asymmetry from polarized cold neutrons captured on protons at the Spallation Neutron Source (SNS) at Oak Ridge National Laboratory (ORNL). The (PV) neutron spin asymmetry A$_{γ}$ of photons from polarized cold neutron capture on protons is proportional to the ΔI=1 long range weak meson coupling $h_{\pi }^{1}$ between nucleons in the hadronic weak interaction (HWI). Liquid para-hydrogen production data taking concluded in April 2014 and once the background aluminum asymmetry measurements are complete, the PV asymmetry A$_{γ}$ can be extracted. Preliminary results of the analysis of A$_{γ}$ are presented.

Keyword(s): Nucleon-nucleon interactions ; Parity-violation ; Nuclear tests of fundamental symmetries ; Few nucleon systems


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Total numbers of views: 329
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DOI: 10.1007/s10751-016-1376-4
 Запись создана 2017-01-09, последняя модификация 2017-02-02



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