$\vert {{\mathit q}_{{{p}}}}+{{\mathit q}_{{{e}}}}\vert /{{\mathit e}}$

INSPIRE   JSON  (beta) PDGID:
S016DQ
See BRESSI 2011 for a summary of experiments on the neutrality of matter. See also “${{\mathit n}}$ CHARGE” in the neutron Listings.
VALUE DOCUMENT ID  COMMENT
$\bf{<1 \times 10^{-21}}$ 1
BRESSI
2011
Neutrality of SF$_{6}$
• • We do not use the following data for averages, fits, limits, etc. • •
$<3.2 \times 10^{-20}$ 2
SENGUPTA
2000
binary pulsar
$<0.8 \times 10^{-21}$
MARINELLI
1984
Magnetic levitation
$<1.0 \times 10^{-21}$ 1
DYLLA
1973
Neutrality of SF$_{6}$
1  BRESSI 2011 uses the method of DYLLA 1973 but finds serious errors in that experiment that greatly reduce its accuracy. The BRESSI 2011 limit assumes that ${{\mathit n}}$ $\rightarrow$ ${{\mathit p}}{{\mathit e}^{-}}{{\mathit \nu}_{{{e}}}}$ conserves charge. Thus the limit applies equally to the charge of the neutron.
2  SENGUPTA 2000 uses the difference between the observed rate of of rotational energy loss by the binary pulsar PSR B1913+16 and the rate predicted by general relativity to set this limit. See the paper for assumptions.
Conservation Laws:
ELECTRIC CHARGE ($\mathit Q$)
References