ar X iv : h ep - p h / 95 10 45 0 v 1 3 1 O ct 1 99 5 Searching for B c mesons in the ATLAS experiment at LHC ∗

ar X iv : h ep - p h / 95 06 30 6 v 1 1 3 Ju n 19 95 Searching for B c mesons in the ATLAS experiment at LHC ∗

We discuss the feasibility of the observation of the signal from B c mesons in the ATLAS experiment of the LHC collider at a luminosity of ≈ 10 33 cm −2 s −1. In particular we address the decay mode B c →J/ψπ followed by the leptonic decay J/ψ→µ + µ − , which should permit an accurate measurement of the B c mass. We performed a Monte Carlo study of the signal and background concluding that a pr...

ar X iv : h ep - p h / 95 10 33 7 v 1 1 8 O ct 1 99 5 BARI - TH / 95 - 217 Υ ( 4 S ) →

We give an estimate of the C-even B 0 ¯ B 0 background coming from the radia-tive decay Υ(4S) → B 0 ¯ B 0 γ at B-factories. Our result B(Υ(4S) → B 0 ¯ B 0 γ) ≃ 3× 10 −9 shows that such background could be safely neglected in the analyses of CP violating effects.

ar X iv : h ep - p h / 98 03 29 2 v 3 2 8 O ct 1 99 8 NATURE OF THE SCALAR a 0 ( 980 ) AND f 0 ( 980 ) - MESONS

It is presented a critical consideration of all unusual properties of the scalar a 0 (980) and f 0 (980)-mesons in the four-quark, two-quark and molecular models. The arguments are adduced that the four-quark model is more preferable. It is discussed the complex of experiments that could finally resolve this issue.

ar X iv : h ep - p h / 95 10 41 9 v 2 2 7 O ct 1 99 5 CERN - TH / 95 - 285 ν τ OSCILLATION EXPERIMENTS AND PRESENT DATA

Our goal in this paper is to examine the discovery potential of laboratory experiments searching for the oscillation νµ(νe) → ντ , in the light of recent data on solar and atmospheric neutrino experiments, which we analyse together with the most restrictive results from laboratory experiments on neutrino oscillations in a four-neutrino framework.

ar X iv : h ep - p h / 99 10 24 8 v 1 6 O ct 1 99 9 1 Effect of σ ( 600 ) - Production in pp̄ → 3 π 0 at rest