Hamburg 2016 – scientific programme

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T: Fachverband Teilchenphysik

T 31: Elektroschwache Wechselwirkung und BSM (Theorie)

T 31.7: Talk

Monday, February 29, 2016, 18:20–18:35, VMP8 SR 105

Nonlinear neutrino-photon interactions inside strong laser pulses — •Sebastian Meuren, Christoph H. Keitel, and Antonino Di Piazza — Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, D-69117 Heidelberg

As different neutrino mass eigenstates exist, only the lightest neutrino is absolutely stable. However, due to the small phase space and the GIM suppression mechanism the radiative neutrino lifetime is much larger than the age of the universe [1]. Interestingly, the photon-emission probability by a neutrino is drastically increased in the presence of an external background field [2]. Therefore, it is natural to ask the question whether this so-called “electromagnetic catalysis” could be studied in an laboratory experiment using existing and upcoming laser facilities [3]. To shed light on this question, we derive the vector-axialvector coupling tensor in the presence of an arbitrary plane-wave background field [4], which is needed for the calculation of the radiative neutrino decay. Furthermore, we study the Adler-Bell-Jackiw anomaly associated with this object in detail.

[1] P.B. Pal and L. Wolfenstein, Phys. Rev. D 25, 766 (1982)
A.A. Gvozdev et al., Phys. Lett. B 313, 161 (1993)
Di Piazza et al., Rev. Mod. Phys. 84, 1177 (2012)
S. Meuren, C. H. Keitel and A. Di Piazza, JHEP 6, 127 (2015)