Heavy flavour physics from top to bottom

We review the status of heavy flavour physics at the Fermilab Tevatron collider by summarizing recent top quark and B physics results from CDF and D0. In particular we discuss the measurement of the top quark mass and top production cross section as well as B meson lifetimes and time dependent B{bar B} mixing results. An outlook of perspectives for top and B physics in Run II starting in 1999 is also given. 38 refs., 23 figs., 8 tabs

Re-evaluation of the LHC potential for the measurement of Mw

We present a study of the LHC sensitivity to the W boson mass based on simulation studies. We find that both experimental and phenomenological sources of systematic uncertainties can be strongly constrained with Z measurements: the lineshape is robustly predicted, and its analysis provides an accurate measurement of the detector resolution and absolute scale, while the differential cross-section analysis absorbs most of the strong interaction uncertainties. A sensitivity \delta Mw \sim 7 \MeV for each decay channel (W --> e nu, W --> mu nu), and for an integrated luminosity of 10 fb-1, appears as a reasonable goal

Pojedinačna tvorba top kvarkova sudaračem Fermilab Tevatron

First evidence for single top quark production has recently been found by both the D0 and CDF experiments. By combining three analyses, D0 measured a cross section of σ(pp¯ → tb + X, tqb + X) = 4.7 ± 1.3 pb, with a significance of 3.6 standard deviations, and CDF’s matrix elements analysis measured a cross section of σ (pp¯ → tb + X, tqb + X) = 3.0 +1.2 −1.1 pb, with a significance of 3.1 standard deviations. These analyses also provided the first direct measurements of the CKM matrix element, |Vtb|, without assuming unitarity. This paper briefly describes the latest single top production results from the two experiments.U nedavnim smo mjerenjima D0 i CDF našli prve podatke o tvorbi pojedinačnih top kvarkova. Spajanjem triju analiza, mjerenja D0 dala su udarni presjek σ(pp¯ → tb+ X, tqb+ X) = 4.7±1.3 pb, na razini pouzdanosti 3.6 standardne devijacije, dok su mjerenja CDF analizom matričnih elemenata odredila udarni presjek σ (pp¯ → tb + X, tqb + X) = 3.0 +1.2 −1.1 pb na razini pouzdanosti 3.1 standardne devijacije. Te su analize također dale prvo izravno određivanje CKM matričnog elementa, |Vtb|, bez pretpostavke unitarnosti. U ovom se radu opisuju najnoviji ishodi tvorbe pojedinačnih top kvarkova u tim dvama mjerenjima

Low-mass fermiophobic charged Higgs phenomenology in two-Higgs-doublet models

After the recent discovery of a Higgs-like boson, the possibility of an enlarged scalar sector arises as a natural question. Experimental searches for charged scalars have been already performed with negative results. We analyze the phenomenology associated with a fermiophobic charged Higgs (it does not couple to fermions at tree level), in two-Higgs-doublet models. All present experimental bounds are evaded trivially in this case, and one needs to consider other decay and production channels. We study the associated production of a charged Higgs with either a W or a neutral scalar boson, and the relevant decays for a light fermiophobic charged Higgs. The interesting features of this scenario should result encouraging for the LHC collaborations to perform searches for such a particle

Boson pair production and triple gauge couplings

The D0 and CDF Collaborations measure boson pair production including W{gamma}, WW, WZ, ZZ and Z{gamma} production in p{anti p} collisions at {radical}s = 1800 GeV. New results, from direct measurements, are described including W{gamma}, WW, and Z{gamma} production cross sections and limits on non-Standard Model triple gauge boson couplings. The limits on anomalous WW{gamma}, WWZ, Z{gamma}{gamma} and ZZ{gamma} couplings are the most restrictive available. Prospects for Run II are discussed

Jet studies at all rapidities from D0 and CDF

We present results on measurements of jet shapes, color coherence, and topology of multijet events from {ital p}{ital {anti p}} collisions at {radical}s = TeV at the Fermilab Tevatron collider using the CDF and D{null} detectors. The data are compared to next-to-leading order QCD calculations, or to predictions of parton shower based Monte Carlo models

Charm and beauty results from CDF and D0

I report, for the CDF and D0 collaborations, results from the 92-93 Tevatron Collider run concerning charm and beauty quark production and beauty meson decay properties