$Large off-shell effects in the $\bar{D}^$ contribution to $B \to \bar{D} \pi \pi$ and $B \to \bar{D} \pi \bar{\ell} \nu_{\ell}$ decays$

Large off-shell effects in the $\bar{D}^$ contribution to $B \to \bar{D} \pi \pi$ and $B \to \bar{D} \pi \bar{\ell} \nu_{\ell}$ decays

We stress that, although the D¯* is very narrow (one hundred keV), the difference between the full D¯* contribution to B→D¯ππ and its zero-width limit is surprisingly large: several percent. This phenomenon is a general effect that appears when considering the production of particles that are couple...

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Veröffentlicht in:	Physical review. D 2019, Vol.99 (7)
Hauptverfasser:	Le Yaouanc, Alain, Leroy, Jean-Pierre, Roudeau, Patrick
Format:	Artikel
Sprache:	eng
Schlagworte:	High Energy Physics - Phenomenology Physics
Online-Zugang:	Volltext
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