Opper AK, Korkmaz E, Hutcheon DA, Abegg R, Davis CA, Finlay RW, Green PW, Greeniaus LG, Jordan DV, Niskanen JA, O'Rielly GV, Porcelli TA, Reitzner SD, Walden PL, Yen S. Charge symmetry breaking in np-->dpi(0).
PHYSICAL REVIEW LETTERS 2003;
91:212302. [PMID:
14683292 DOI:
10.1103/physrevlett.91.212302]
[Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/05/2003] [Indexed: 05/24/2023]
Abstract
The forward-backward asymmetry in np-->dpi(0), which must be zero in the center-of-mass system if charge symmetry is respected, has been measured to be [17.2+/-8.0(stat)+/-5.5(syst)]x10(-4), at an incident neutron energy of 279.5 MeV. This observable is compared to recent chiral effective field theory calculations, with implications regarding the du quark mass difference.
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