Interference effects in BSM processes with a generalised narrow-width approximation

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Interference effects in BSM processes with a generalised narrow-width approximation

A generalisation of the narrow-width approximation (NWA) is formulated which allows for a consistent treatment of interference effects between nearly mass-degenerate particles in the factorisation of a more complicated process into production and decay parts. It is demonstrated that interference effects of this kind arising in BSM models can be very large, leading to drastic modifications of pr...

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ژورنال

عنوان ژورنال: The European Physical Journal C

سال: 2015

ISSN: 1434-6044,1434-6052

DOI: 10.1140/epjc/s10052-015-3472-z