The flavour changing neutral current decay b → sγ has been detected in hadronic Z decays collected by ALEPH at LEP. The signal is isolated in lifetime-tagged b b ̄ events by the presence of a hard photon associated with a system of high momentum and high rapidity hadrons. The background processes are normalised from the data themselves. The inclusive branching ratio is measured to be (3.11±0.80 stat ±0.72 syst )×10 −4 , consistent with the Standard Model expectation via penguin processes.

A Measurement of the inclusive b → sᵧ branching ratio

Foa', Lorenzo;Ligabue, Franco;Azzurri, Paolo
1998

Abstract

The flavour changing neutral current decay b → sγ has been detected in hadronic Z decays collected by ALEPH at LEP. The signal is isolated in lifetime-tagged b b ̄ events by the presence of a hard photon associated with a system of high momentum and high rapidity hadrons. The background processes are normalised from the data themselves. The inclusive branching ratio is measured to be (3.11±0.80 stat ±0.72 syst )×10 −4 , consistent with the Standard Model expectation via penguin processes.
A Measurement of the inclusive b → s[gamma] branching ratio
11-giu-1998
Settore FIS/01 - Fisica Sperimentale
File in questo prodotto:
File Dimensione Formato  
A-measurement.pdf

accesso aperto

Descrizione: journal article full text
Tipologia: Altro materiale allegato
Licenza: Creative Commons
Dimensione 588.65 kB
Formato Adobe PDF
588.65 kB Adobe PDF

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11384/91791
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 355
  • ???jsp.display-item.citation.isi??? 324
  • OpenAlex ND
social impact