Study of intranuclear collision effects in interactions of K+ / pi+ mesons with Al and Au nuclei at 250-GeV/c.

The EHS/NA22 collaboration Agababyan, N.M. ; Ajinenko, I.V. ; Botterweck, F. ; et al.
Z.Phys.C 56 (1992) 371-380, 1992.
Inspire Record 345620 DOI 10.17182/hepdata.14529

Multiplicity, inclusive, correlation and collective characteristics of multiparticle production processes inK+ Al,K+ Au, π+ Al and π+ Au interactions at 250 GeV/c are studied with the European Hybrid Spectrometer, providing high statistics and almost 4 π acceptance for final state charged particles. It is shown that the proton energy spectrum practically does not depend on the target atomic weight, but the proton angular distributions reveal a strongA-dependence. In a model independent way, the average number of intranuclear collisions is extracted, and it is shown that their dominant part (60% for Al and 80% for Au) is caused by interactions of the non-leading particles produced in the target fragmentation. The multiplication ratio of the produced particles for the Au nucleus changes fromR≃40 at the smallest rapidities in the target fragmentation region, down toR=0.37±0.06 at the largest rapidities in the beam fragmentation region. It is found that the average total longitudinal momentum of the charged products of the beam fragmentation depends weakly on the number of leading hadron (cluster) intranuclear collisions which are characterized by a low inelasticity coefficient 〈k〉=0.17±0.03.

2 data tables

No description provided.

No description provided.


Deuteron production in collisions of 250-GeV/c pi+ and K+ mesons with Al and Au nuclei.

The EHS/NA22 collaboration Agababyan, N.M. ; Boettcher, H. ; Botterweck, F. ; et al.
Z.Phys.C 52 (1991) 231-238, 1991.
Inspire Record 324034 DOI 10.17182/hepdata.14927

Experimental data are presented on deuteron production in the target fragmentation region for 250 GeV/c π+ interactions with Al and Au nuclei, and compared with analogous data on proton production. Indications are observed for narrow structures in the (dπ-) effective mass system at ∼2.04 and ∼2.08 GeV.

18 data tables

Number of weighted events as a function of number of forward produced deuterons.

Number of weighted events as a function of number of forward produced deuterons.

Mean deuteron multiplicity.

More…

Study of the A-dependence of Inclusive $p$, $\bar{p}$, $\Lambda$ and $\bar{\Lambda}$ Production in $\pi^\pm$ Nucleus Interactions at 30-{GeV}/$c$

The CERN-Lisbon-Neuchatel-Paris-Warsaw collaboration Abreu, M.G. ; Armstrong, T. ; Baubillier, M. ; et al.
Z.Phys.C 25 (1984) 115, 1984.
Inspire Record 200776 DOI 10.17182/hepdata.16301

We present the first results on the production of fast (p>10 GeV/c)p,\(\bar p\), Λ and\(\bar \Lambda \) from π± hydrogen and nucleus interactions at 30 GeV/c using the CERN Ω′ spectrometer. We have used five nuclear targets (C, Al, Cu, Sn, Pb) to study theA-dependence of the inclusive particle distributions in the region 0.3<xF<0.6. The high statistical level of our experiment allows us to demonstrate the differentA-behaviour of baryon and antibaryon inclusive reactions. We relate this difference to the final state interaction inside a nucleus using the formation-zone model.

1 data table

No description provided.


Experimental Study of the a-Dependence of Inclusive Hadron Fragmentation

Barton, D.S. ; Brandenburg, G.W. ; Busza, W. ; et al.
Phys.Rev.D 27 (1983) 2580, 1983.
Inspire Record 12592 DOI 10.17182/hepdata.23823

Data are presented on the inclusive production of π±, K±, p, and p¯ for π+, K+, and protons incident on nuclear targets at 100 GeV. The results cover the kinematic range 30≤P≤88 GeV/c for Pt=0.3 and 0.5 GeV/c. The observed A dependence of the invariant cross sections exhibits remarkable simplicity, which does not naturally follow from current models of particle production. The results show that the hypothesis of limiting fragmentation can be extended to include collisions with nuclei.

1 data table

No description provided.