Photon intrinsic frequency and size in stringy photon model

Exploiting an open string which performs both rotational and pulsating motions, we investigate a photon intrinsic frequency. Explicitly evaluating the zero point fluctuation of the string which is delineated in terms of the quantum mechanical ground state energy in the vibrational mode of the string and the classical energy in the rotational mode, we find that the intrinsic frequency of the photon is given by $ω_γ=9.00\times 10^{23}~{\rm sec}^{-1}$ and comparable to those of the baryons such as nucleon and delta baryon. Next, we calculate the photon size $\langle r^{2}\rangle^{1/2}(\rm photon)=0.17~{\rm fm}$ in a phenomenological stringy photon model.

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