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Search for flavoured leptonic decays of long-lived particles in the LHCb detector

Publications associées (138)

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Study of the e+e-→Zγ process at LEP and limits on triple neutral-gauge-boson couplings

Aurelio Bay

The process e+e-→Zγ where the Z boson decays into hadrons or neutrinos, is studied with data collected with the L3 detector at LEP at centre-of-mass energies from 189 up to 209 GeV. The cross sections are measured and found to be in agreement with the Stan ...

2004

Search for anomalous couplings in the Higgs sector at LEP

Aurelio Bay

Anomalous couplings of the Higgs boson are searched for through the processes e+e-→Hγ, e+e -→e+e-H and e+e -→HZ. The mass range 70 GeV

2004

Z boson pair-production at LEP

Aurelio Bay

Events stemming from the pair-production of Z bosons in e+e - collisions are studied using 217.4 pb-1 of data collected with the L3 detector at centre-of-mass energies from 200 GeV up to 209 GeV. The special case of events with b quarks is also investigate ...

2003

Measurement of W polarisation at LEP

Aurelio Bay

The three different helicity states of W bosons produced in the reaction e+e- → W+W- → lvqq̄′ at LEP are studied using leptonic and hadronic W decays. Data at centre-of-mass energies √s = 183-209 GeV are used to measure the polarisation of W bosons, and it ...

2003

Graviscalars from higher-dimensional metrics and curvature-Higgs mixing

Riccardo Rattazzi

We investigate the properties of scaler fields arising from gravity propagating in extra dimensions. In the scenario of large extra dimensions, proposed by Arkani-Hamed. Dimopoulos and Dvali, graviscalar Kaluza-Klein excitations are less important than the ...

2001

R-parity violation and unification

Riccardo Rattazzi

The reported anomaly in deep-inelastic scattering at HERA has revived interest in the phenomenology of R-parity violation. From the theoretical point of view, the existence of R-violating interactions poses two considerable problems. The first one concerns ...

1997

Inverse Hierarchy Approach to Fermion Masses

Riccardo Rattazzi

The first fermion family might play a special role in understanding the physics of flavour. This possibility is suggested by the observation that the up-down splitting within quark families increases with the family number: m(u) is similar to m(d), m(c) > ...

1993

Radiative Quark Masses Constrained by the Gauge Group Only

Riccardo Rattazzi

We discuss the possibility of obtaining the observed pattern of quark masses and mixings as a consequence of radiative corrections, gauge invariance and particle content of the theory. We do not allow any kind of additional symmetry, such as family and dis ...

1991