arXiv subjects

M. Biyajima

Publications and source records attributed to M. Biyajima.

41 records · Page 3Linked to original sources

arXiv1996

Coulomb wave function correction including momentum resolution for charged hadron pairs: Analysis of data for $π^+π^-$ pair production in $p\;+$ Ta reaction at 70 GeV/c

We propose a new method for the Coulomb wave function correction including the momentum resolution for charged hadron pairs and apply it to the precise data on $π^+π^-$ correlations obtained in $p + \mbox{Ta}$ reaction at 70 GeV/c. It is found that interaction regions of this reaction (assuming Gaussian source function) are $5.6 \pm 3.0$ and $4.4 \pm 2.6$ fm for the thicknesses of the target $8$ and $1.4$ microns, respectively. The physical picture of the source size obtained in this way is discussed.

hep-ph↗

arXiv1996

Multiplicity Distributions in QCD and $λφ^3_6$-model

It is shown that QCD with vector gluons predicts drastically different multiplicity distributions compared to the scalar $λφ^3$-model (in 6 dimensions). In particular, the QCD predicted minimum of cumulant moments of the distributions at ranks about $5\div7$ does not reveal itself in the scalar model. The oscillations at higher ranks survive only. Thus, the experimental fact of that minimum at ranks about $5\div7$ supports the vector nature of gluons and singular kernels in QCD and gluodynamics.

hep-ph↗

arXiv1995

Totally Chaotic Poissonian-Like Sources in Multiparticle Production Processes?

In all multiparticle processes the concept of sources directly emitting finally observed secondaries (mostly pions) plays crucial role. Here we shall present them from yet another point of view in which elementary sources composing all processes (from e+e- annihilation, via pp up to AA interactions) remain both totally 'chaotic' and Poissonian at the same time.

hep-ph↗

arXiv1995

Improved Coulomb Correction Formulae for Bose-Einstein Correlations

We present improved Coulomb correction formulae for Bose-Einstein correlations including also exchange term and use them to calculate appropriate correction factors for several source functions. It is found that Coulomb correction to the exchange function in the Bose-Einstein correlations cannot be neglected.

hep-ph↗

arXiv1995

Intermittency and Bose-Einstein correlations

The role of Bose-Einstein correlations in a widely discussed intermittency phenomenon is reviewed. In particular, it is shown that particle correlations of different origin are better displayed when analysed as functions of appropriately chosen variables. Correspondingly, if the shape of Bose-Einstein contribution is chosen to be Gaussian in 3-momentum transferred, it provides the power-like law in 4-momentum squared and is smeared out in (pseudo)rapidity.

hep-ph↗