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Monopole Density $-$ Matter Searches

DENSITY

CHG ${\mathrm {(\mathit g)}}$

MATERIAL

DOCUMENT ID

TECN

$ \text{<9.8E-5/gram} $

${}\geq{}$1

Polar rock

INDU

$ \text{<6.9E-6/gram} $

$>$1/3

Meteorites and other

INDU

$ \text{<2.E-7/gram} $

>0.6

${}^{}\mathrm {Fe}$ ore

INDU

$ \text{<4.6E-6/gram} $

$>0.5$

deep schist

INDU

$ \text{<1.6E-6/gram} $

$>0.5$

manganese nodules

INDU

$ \text{<1.3E-6/gram} $

$>0.5$

seawater

INDU

$ \text{>1.E+14/gram} $

$>$1/3

iron aerosols

SPEC

$ \text{<6.E-4/gram} $

air, seawater

CNTR

$ \text{<5.E-1/gram} $

>0.04

11 materials

INDU

$ \text{<2.E-4/gram} $

>0.05

moon rock

INDU

$ \text{<6.E-7/gram} $

<140

seawater

CNTR

$ \text{<1.E-2/gram} $

<120

manganese nodules

PLAS

$ \text{<1.E-4/gram} $

>0

manganese

PLAS

$ \text{<2.E-3/gram} $

$<1-$3

magnetite, meteor

EMUL

$ \text{<2.E-2/gram} $

meteorite

CNTR

¹	Mass $1 \times 10^{14}-1 \times 10^{17}$ GeV.

²	KOVALIK 1986 examined 498 kg of schist from two sites which exhibited clear mineralogical evidence of having been buried at least 20$~$km deep and held below the Curie temperature.

Except where otherwise noted, content of the 2024 Review of Particle Physics is licensed under a Creative Commons Attribution 4.0 International (CC BY 4.0) license. The publication of the Review of Particle Physics is supported by US DOE, MEXT (Japan), INFN (Italy) and CERN. Individual collaborators receive support for their PDG activities from their respective institutes or funding agencies. © 2024. See LBNL disclaimers.