A search for charginos with masses close to the mass of the lightest neutralino is reported, based on the data collected with the DELPHI detector at LEP from 1995 to 1997 at centre-of-mass energies between 130 and 183 GeV. The signature of a photon at high transverse momentum radiated from the initial state reduces the two-photon background to acceptable rates, thus making the mass differences between a few hundred MeV/c(2) and 3 GeV/c(2) detectable. In very nearly degenerate scenarios, the lifetime of the chargino can be large enough to produce either visible secondary vertices or decays outside the detector; therefore, quasi-stable heavy charged particles and displaced decay vertices were also searched for. No excess of events with respec...
A search for charginos nearly mass degenerate with the lightest neutralino is performed with the dat...
The data collected by DELPHI in 1998 at the centre-of-mass energy of 189 GeV have been used to updat...
A search was performed for charginos with masses close to the mass of the lightest neutralino in e+e...
A search for charginos with masses close to the mass of the lightest neutralino is reported, based o...
A search for charginos with masses close to the mass of the lightest neutralino is reported, based o...
A search for charginos nearly mass degenerate with the lightest neutralino is performed with the dat...
A search for charginos nearly mass degenerate with the lightest neutralino is performed with the dat...
A search for charginos nearly mass degenerate with the lightest neutralino is performed with the dat...
A search for charginos nearly mass degenerate with the lightest neutralino is performed with the dat...
The data collected by DELPHI in 1998 at the centre-of-mass energy of 189 GeV have been used to updat...
A search was performed for charginos with masses close to the mass of the lightest neutralino in e+e...
A search for charginos with masses close to the mass of the lightest neutralino is reported, based o...
A search for charginos with masses close to the mass of the lightest neutralino is reported, based o...
A search for charginos nearly mass degenerate with the lightest neutralino is performed with the dat...
A search for charginos nearly mass degenerate with the lightest neutralino is performed with the dat...
A search for charginos nearly mass degenerate with the lightest neutralino is performed with the dat...
A search for charginos nearly mass degenerate with the lightest neutralino is performed with the dat...
The data collected by DELPHI in 1998 at the centre-of-mass energy of 189 GeV have been used to updat...
A search was performed for charginos with masses close to the mass of the lightest neutralino in e+e...