[en] The LHCb experiment offers a complementary phase space region to ATLAS and CMS to study electroweak processes, thanks to the unique acceptance and the large bandwidth trigger at low energy threshold. Here, the latest measurements performed during the LHC Run I and Run II data taking are presented. In particular the determination of the effective electroweak mixing angle, obtained by studying the forward-backward asymmetry in the Z → μ"+μ"− decay, is discussed.

[en] The LHCb experiment offers a complementary phase space region with respect to ATLAS and CMS to study electroweak processes, thanks to the unique acceptance and the large bandwidth trigger at low energy threshold. Here, the latest measurements performed during the LHC Run-I data taking are presented, setting the scene for the future. Possible developments in this sector are discussed, in particular the search for b¯b resonances, considered preferred channels in the observation of new exotic states and New Physics.

[en] The LHCb experiment offers a complementary phase space region to ATLAS and CMS to study electroweak processes, thanks to the precision in the forward acceptance, corresponding to the pseudo-rapidity range 2 < η < 5. Here the measurement of the leptons asymmetry in the decay Z → μ"+μ"−, performed using data collected by LHCb during the LHC Run I data taking, is presented. By studying this asymmetry LHCb determined the effective electroweak mixing angle, with the highest precision of the LHC experiments.

[en] A muon collider represents the ideal machine to reach very high center-of-mass energies and luminosities by colliding elementary particles. This is the result of the low level of beamstrahlung and synchrotron radiation compared to linear or circular electron-positron colliders. In contrast with other lepton machines, the design of a detector for a multi-TeV muon collider requires detailed knowledge of the interaction region due to the significant backgrounds created by muon beam decays in the collider ring. The physics reach can be properly evaluated only when the detector performance in such an environment is determined. In this work, the backgrounds generated by muon beams of $750$ GeV are characterized and the performance of the tracking system and the calorimeter detector is illustrated. Solutions to minimize the effect of the beam-induced backgrounds are discussed and applied to obtain track and jet reconstruction performance. The ${\mathrm{\mu <!--\; ??\; -->}}^{+}{\mathrm{\mu <!--\; ??\; -->}}^{-<!--\; ???\; -->}\to <!--\; ???\; -->H\mathrm{\nu <!--\; ??\; -->}\stackrel{¯<!--\; ??\; -->}{\mathrm{\nu <!--\; ??\; -->}}\to <!--\; ???\; -->b\stackrel{¯<!--\; ??\; -->}{b}\mathrm{\nu <!--\; ??\; -->}\stackrel{¯<!--\; ??\; -->}{\mathrm{\nu <!--\; ??\; -->}}$ process is fully simulated and reconstructed to demonstrate that physics measurements are possible in this harsh environment. The measurement precision for the Higgs boson coupling to $b\stackrel{¯<!--\; ??\; -->}{b}$ is evaluated for $\sqrt{s}=1.5$, 3, and 10 TeV and compared to other proposed machines.