$\vert \mathit q_{{{\mathit p}}}~+~\mathit q_{{{\overline{\mathit p}}}}\vert /{{\mathit e}}$

INSPIRE   JSON  (beta) PDGID:
S016DQ2
A test of $\mathit CPT$ invariance. Note that the comparison of the ${{\overline{\mathit p}}}$ and ${{\mathit p}}$ charge-to-mass ratios given above is much better determined. See also a similar test involving the electron.
VALUE CL% DOCUMENT ID TECN  COMMENT
$\bf{<7 \times 10^{-10}}$ 90 1
HORI
2011
SPEC ${{\overline{\mathit p}}}{{\mathit e}^{-}}{}^{}\mathrm {He}$ atom
• • We do not use the following data for averages, fits, limits, etc. • •
$<2 \times 10^{-9}$ 90 1
HORI
2006
SPEC ${{\overline{\mathit p}}}{{\mathit e}^{-}}$He atom
$<1.0 \times 10^{-8}$ 90 1
HORI
2003
SPEC ${{\overline{\mathit p}}}{{\mathit e}^{-}}{}^{4}\mathrm {He}$, ${{\overline{\mathit p}}}{{\mathit e}^{-}}{}^{3}\mathrm {He}$
$<6 \times 10^{-8}$ 90 1
HORI
2001
SPEC ${{\overline{\mathit p}}}{{\mathit e}^{-}}{}^{}\mathrm {He}$ atom
$<5 \times 10^{-7}$ 2
TORII
1999
SPEC ${{\overline{\mathit p}}}{{\mathit e}^{-}}{}^{}\mathrm {He}$ atom
$<2 \times 10^{-5}$ 3
HUGHES
1992
RVUE
1  HORI 2001, HORI 2003, HORI 2006, and HORI 2011 use the more-precisely-known constraint on the ${{\overline{\mathit p}}}$ charge-to-mass ratio of GABRIELSE 1999 (see above) to get their results. Their results are not independent of the HORI 2001, HORI 2003, HORI 2006, and HORI 2011 values for $\vert {\mathit m}_{{{\mathit p}}}−{\mathit m}_{{{\overline{\mathit p}}}}\vert /{\mathit m}_{{{\mathit p}}}$, above.
2  TORII 1999 uses the more-precisely-known constraint on the ${{\overline{\mathit p}}}$ charge-to-mass ratio of GABRIELSE 1995 (see above) to get this result. This is not independent of the TORII 1999 value for $\vert {\mathit m}_{{{\mathit p}}}−{\mathit m}_{{{\overline{\mathit p}}}}\vert /{\mathit m}_{{{\mathit p}}}$, above.
3  HUGHES 1992 uses recent measurements of Rydberg-energy and cyclotron-frequency ratios.
Conservation Laws:
$\mathit CPT$ INVARIANCE
References