We present a measurement of the mass difference ∆md for the B 0 meson and the statistical power of the b flavor tagging methods used. The measurement uses 90 pb of data from pp̄ collisions at √ s = 1.8 TeV collected with the CDF detector. An inclusive lepton trigger is used to collect a large sample of B hadron semileptonic decays. The mass difference ∆md is determined from the proper time depen...

The LHCb detector is a general purpose forward spectrometer at the Large Hadron Collider, which exploits the ≈ 300 μb cross-section for bb̄ production and ≈ 6 mb cross-section for cc̄ production in 7 TeV proton-proton collisions to make precise measurements of the properties of heavy flavour hadrons. Studies of excited B and D mesons using a dataset corresponding to 1 fb−1 of integrated luminosit...

The main purpose of the NA62 experiment at the CERN SPS is to measure the Branching Ratio of the ultra-rare kaon decay K+ → π+νν̄ with 10% accuracy. This will be achieved by collecting about 100 events with a Signal to Background ratio of 10/1. NA62 will use a 75 GeV/c unseparated charged hadron beam and a kaon decay-in-flight technique. For the kaon identification a hydrogen gas-filled differen...

We construct the higher twist structure functions that describe inclusive b hadron decays in regions of phase space where the hadronic decay products carry high energy but have low invariant mass. We show that, for B meson decays, there are four new nonvanishing matrix elements of nonlocal operators. We show that to subleading twist these decays are parametrized in terms of four functions. We c...

We study the production and decay of neutral scalars and pseudo-scalars at hadron colliders, in theories where the top-quark mass is the result of a tt̄ condensate. We show that the dominant decay channel for masses below the tt̄ threshold is the flavor changing mode tc. This is a consequence of the non-universal nature of the underlying interactions in all top-condensation models and provides a ...

Top quark events in hadron collisions often contain additional hadronic jets from gluon bremsstrahlung off the quarks and gluons in the hard subprocesses. Such extra jets must be taken into account in attempts to reconstruct the momentum of the top quark from those of its decay products. We have performed a complete calculation of gluon radiation in top production and decay at the Fermilab Teva...

In the decay of Υ(4S), the decay time distribution of Υ(4S) → f + X, where f is a final state that both B and B 0 can decay to, is the sum of the decay time distributions of B → f and B → f . Using this general rule, we estimate the sensitivity of single lepton CP violation measurements with respect to that of traditional di-lepton measurements. We find that the sensitivity of the single lepton...

We construct the higher twist structure functions that describe inclusive b hadron decays in regions of phase space where the hadronic decay products carry high energy but have low invariant mass. We show that, for B meson decays, there are four new non-vanishing matrix elements of non-local operators. We show that to subleading twist these decays are parametrized in terms of four functions. We...

In TeV-scale gravity scenarios with large extra dimensions, black holes may be produced at future colliders. Good arguments have been made for why general relativistic black holes may be just out of reach of the Large Hadron Collider (LHC). However, in weakly-coupled string theory, highly excited string states – string balls – could be produced at the LHC with high rates and decay thermally, no...

We discuss the theory and phenomenology of decays of a leptophobic U(1) X gauge boson X, such as has been proposed to explain the alleged deviations of Rb and Rc from standard model predictions. If the scalars involved in the breaking of the SU(2)×U(1) symmetry are sufficiently light, X will sometimes decay into a charged (or neutral) scalar along with an oppositely-charged W (or Z). These deca...