Patrick Heiliger

Semileptonic decays of B mesons into τντ

Abstract We discuss the characteristics of the decays B→Dτν and B→D ∗ τν, with particular reference to probing form factors that are inaccessible in the eν e and μν μ modes. Features discussed include the τ : e ratio, the τ spectrum and the τ polarization.

Possibility of a locally, strongly increasing total cross section and related large real amplitude for\(\bar p\)(p)−p scattering up to 1000 TeV

AbstractUsing a new form for the diffractive amplitude, we show the possibility of a local increase above asymptotic behavior in the

ΔQ=−ΔS contributions to Kℓ3 decay

\bar p

CHARGE STRUCTURE IN THE Z0 AS A POSSIBLE ORIGIN OF RARE DECAYS Z0→l+l−γγ

(p)−p total cross section well up in the TeV range with values of about 180 mb reached at 100 TeV and 316 mb at 1000 TeV. Use of this locally, relatively strongly rising cross section in the dispersion relation leads to evaluation of the real to imaginary part ratio ϱ, for the forward scattering amplitude up into the TeV range. This quantity increases; we obtain ϱ=18% at 40 TeV. On the basis of a physical picture involving the growth of average multiplicities, it appears possible that asymptotic, bounded growth for the cross section may be reached only at collision energies in the vicinity of 1000 TeV. In this domain, certain global measures of partonic behavior come close to the behavior of the produced physical hadrons.

Consequences of the existence of two multiplicity distributions in electron-positron annihilation into pions

A new structure for the high-energy diffractive scattering amplitude is derived in two complementary ways (one of them recently revealed as due to Richard Feynman). Total cross-sections increase, due to a blackening of the interaction and also due to an effect which leads to an increase in the effective interaction area at fixed opacity. These features are dynamically related to the dominant high-energy process of multiparticle production.

MULTIHADRON PRODUCTION AND A MODIFICATION OF POLYAKOV’S FORM

Abstract We consider a contribution to the ΔQ =− ΔS transition K 0 → π + l − v l obtained by combining K 0 → π + π − with π − → l − v l , and find Γ( K 0 → π + μ − v μ ) Γ( K 0 → π + μ − v μ ) = 1.1 × 10 −12 . The ΔQ =− ΔS amplitude can interfere with the ΔQ =+ ΔS amplitude for right-hande μ − . The amplitude ratio is nominally 10 −6 , but is strongly enhanced in the neighbourhood of the pion pole ( s μν ≈ m π 2 , and in configurations in which the π + and μ − are antiparallel in the lepton CM frame. We comment on the effects of ΔQ =± ΔS interference on the charge asymmetry in K L → π ± μ ∓ v .

Elastic scattering and single diffractive dissociation inp(\(\bar p\))-p collisions up to 1000 TeV from a theory with fluctuations in the eikonal

AbstractThe decay width of theZ0 associated with its coupling tou andd quarks is usually expressed as the incoherent sum of the widths into