in Bargmann–Michel–Telegdi equation(adsbygoogle = window.adsbygoogle || []).push({});

[tex]

{\;\,dS^\alpha\over d\tau}={e\over m}\bigg[{g\over2}F^{\alpha\beta}S_\beta+\left({g\over2}-1\right)U^\alpha\left(S_\lambda F^{\lambda\mu}U_\mu\right)\bigg]\;,

[/tex]

there is [itex]g[/itex]-factor present. I'm a bit confused about its definition. If it is defined as

[tex]

\boldsymbol{\mu}_S = \frac{g_{e,p}\mu_\mathrm{B}}{\hbar}\boldsymbol{S}\;,

[/tex]

where for electron it is [itex]g_e=−2.0023193043622[/itex] and for proton [itex]g_p= 5.585694713[/itex], then in BMT equation one should probably use its negative [itex]g=-g_{e,p}[/itex] and not the absolute value.

Is this correct?

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# G-factor in BMT equation

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