Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1993-03-27
Phys.Rev.Lett.70:4038-4041,1993; Erratum-ibid.71:1117,1993; Erratum-ibid.76:2825,1996
Physics
High Energy Physics
High Energy Physics - Phenomenology
Plain TeX,12 pages,IP/BBSR/92-92
Scientific paper
10.1103/PhysRevLett.70.4038
Pseudo-Goldstone bosons couple with photons through a P and T violating interaction of the form ${\cal {L_I}}=g_{a\gamma \gamma}~ a F\tilde F$. Strong magnetic fields in rotating compact stars induce a non-zero ${\vec E}\cdot{\vec B}$ outside the stellar surface which acts as a source for the pseudo-scalar field. Pulsar signals propagating through this pseudo-scalar `hair' suffer a differential time lag between the left and the right circularly polarised modes because of the P and T violating pseudoscalar boson-photon interaction. Determination of this time lag upto a microsecond accuracy can lead to a measurment of (or rule out) pseudo-Goldstone boson-photon coupling upto $g_{a \gamma \gamma}\leq 4.6 \times 10^{-9}~GeV^{-1}$.
Mohanty Subhendra
Nayak S. N.
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