Pregled bibliografske jedinice broj: 50707
Bound-state effects in mu+ e- -> gamma gamma and anti-B0(s) -> gamma gamma decays
Bound-state effects in mu+ e- -> gamma gamma and anti-B0(s) -> gamma gamma decays // European Physical Journal C, 17 (2000), 163-168 (međunarodna recenzija, članak, znanstveni)
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Naslov
Bound-state effects in mu+ e- -> gamma gamma and anti-B0(s) -> gamma gamma decays
Autori
Eeg, Jan O. ; Kumerički, Krešimir ; Picek, Ivica
Izvornik
European Physical Journal C (1434-6044) 17
(2000);
163-168
Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni
Ključne riječi
radiative decays; flavour-changing operators; off-shell effects
Sažetak
We demonstrate that in the double-radiative decays of heavy-light QED and QCD atoms, \mu^{+} e^{-}
\to \gamma\gamma and \bar{B}^{0}_{s} \to \gamma\gamma, there is a contribution coming from operators
that vanish on the free-quark mass shell. This off-shell effect is suppressed with respect to the effect of
the well known flavour-changing magnetic-moment operator by the bound-state binding factor.
Accordingly, the negligible off-shellness of the weakly bound QED atoms becomes important for strongly
bound QCD atoms. We present this effect in two different model-approaches to QCD, one of them
enabling us to keep close contact to the related effect in QED.
Izvorni jezik
Engleski
Znanstvena područja
Fizika
Citiraj ovu publikaciju:
Časopis indeksira:
- Current Contents Connect (CCC)
- Web of Science Core Collection (WoSCC)
- Science Citation Index Expanded (SCI-EXP)
- SCI-EXP, SSCI i/ili A&HCI
- Scopus
