Speaker
Dr
Lorenzo Bellagamba
(INFN Bologna)
Description
Searches for single-top production at the $ep$ collider HERA has been
performed using data collected by the H1 and ZEUS Collaborations.
The H1 collaboration analyzed the full HERA data sample
corresponding to an integrated luminosity of 474 pb^-1 looking
both at the leptonic and hadronic decay of the W coming from top decay.
The ZEUS collaboration analyzed data collected in the running period
2004-2007 corresponding to an integrated luminosity of 277 pb^-1 looking
at the leptonic W decay. New ZEUS results have been also combined with a
previous search performed with data collected in 1998-2000 for a total
integrated luminosity of 359 pb^-1.
The results of the searches have been used to constrain single-top
production via flavour changing neutral current (FCNC) transitions.
In case of u-t transition mediated by a photon, the HERA constraints
are the best to date.
Primary author
Dr
Lorenzo Bellagamba
(INFN Bologna)
