Saul Barshay

Simple derivation of the hadronic multiplicity distribution for e+e− annihilations from the distribution for pp collisions

Abstract We point out, and discuss the geometrical basis for a new striking empirical relationship between the full multiplicity distributions of charged hadrons produced in e+e− annihilations and in pp collisions.

Monotonically increasing hadronic temperature in high-multiplicity events at the CERN proton-antiproton collider

Abstract High-multiplicity central events at thep¯p collider occur preferentially at small collision impact parameters. If the effective hadronic temperature increases monotonically with decreasing impact parameter, the mean transverse momentum of all produced particles will increase with the event complexity, in agreement with the new collider data and cosmic-ray observations.

New phenomena in multihadron production in the TeV energy range: An interpretation of large, broad effective clusters in multiplicity distributions

Using an impact-parameter representation of the empirical, broad multiplicity distributions for charged hadrons produced in pp collisions at 30 GeV and in pp collisions at 540 GeV, extrapolations to predictions for these distributions at 2 TeV and at 40 TeV are made. A concept of large effective clusters is considered, related to the multiplicity distribution for central collisions and its variation with energy.

Anomalous soft photons from a coherent hadronic phase in high-energy collisions

Recent experiment indicates that the pT-spectra of inclusive photons produced at central rapidity in 450 GeV/c p-Be and p-Al interactions show a marked excess of direct photons in the region 4 MeV/c≲-pT≲-20 MeV/c, over the photons from decays of neutral mesons and the direct photons expected from hadronic bremsstrahlung. We show that soft photon emission from a pion condensate, which state can be approached in the nuclear medium during the collision, exhibits specific characteristics that can explain the experiment. The very soft photons appear to signal the proximity of a new, coherent dynamical phase.

CP violating partial rate asymmetries in the decays B±→ηπ±, η′π±, ηcπ±: a K-matrix analysis

Abstract We analyse the CP -violating asymmetries in the partial decay widths of B ± → π ± η and B ± → π ± η ′. The asymmetry is assumed to arise as a result of strong-interaction mixing of the channels π ± η ( η ′) with the channel π ± η c . The strength of the mixing is obtained using data on the decays η c → η ( η ′) ππ . Inelastic unitarity is implemented with the help of the K -matrix formalism. We predict large asymmetries, up to about 20%, with branching ratios of 10 −6 –10 −5 . Therefore, these decays provide the best place for testing in charged modes the hypothesis that CP noninvariance arises from a nonzero phase in the quark-mixing matrix.

Strong forward-backward multiplicity correlations in hadron-hadron collisions and their absence in electron-positron annihilation

AbstractIn high-energypp (n

A formula for violation of the scaling behavior in multiplicity distributions at the CERN collider

(bar pp)

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

n) collisions, the average value of backward produced charged particles, taken at fixed number of forward produced particlesnF, depends significantly uponnF. This correlation is absent ine+e− annihilation at present energies. We relate these facts using the picture of the broadpp multiplicity distribution which arises from the incoherent superposition of narrow distributions from all impact parameters.