Inclusive $K^*$+- (892) Production in $p p$ and $\pi^+ p$ Interactions

The Bonn-Hamburg-Munich & Aachen-Bonn-CERN-Cracow collaborations Bockmann, K. ; Hofmann, J. ; Lowsky, J. ; et al.
Nucl.Phys.B 166 (1980) 284-300, 1980.
Inspire Record 144126 DOI 10.17182/hepdata.8001

A study is presented of the inclusive production cross sections of K ∗± (892) vector mesons in pp interactions at 12 and 24 GeV/ c and in π + p interactions at 16 GeV/ c . The K ∗± inclusive cross section is ∼0.9 mb for both pp at 24 GeV/ c and π + p interactions at 16 GeV/ c . For pp interactions, σ( K ∗+ ) and σ( K ∗− ) are seen to rise with energy, showing a threshold behaviour. In both pp and π + p interactions, σ( K ∗+ ) largely exceeds σ( K ∗− ) at these energies and this excess is interpreted as K ∗+ production by beam and target fragmentations. The decays of K ∗±0 yield ∼30% of the K 0 observed in the final states. The p T 2 dependence of both K ∗+ and K ∗ − cross sections is described by an exponential with slope of ∼3.3 (GeV/ c ) −2 . The longitudinal momentum spectra for K ∗+ in 16 GeV/ c π + p and 24 GeV/ c pp interactions are similar in shape in the target hemisphere. The K ∗− spectra are similar over the whole kinematic region when viewed in the quark c.m.s. and point to a central production mechanism. Comparing K ∗+ and ρ 0 production, striking similarities are found.

8 data tables

No description provided.

ASSUMED SIG(KS)=SIG(KL).

No description provided.

More…

Inclusive Strange Particle Production in pi+ p Interactions at 16-GeV/c

The Aachen-Bonn-CERN-Cracow collaboration Bosetti, P. ; Böckmann, Klaus ; Cocconi, Vanna T. ; et al.
Nucl.Phys.B 94 (1975) 21-38, 1975.
Inspire Record 99424 DOI 10.17182/hepdata.32002

The production of K S 0 , Λ and Λ is measured in π + p reactions at 16 GeV/ c . The total strange particle cross section is found to be 4.0 ± 0.3 mb, about 20% of the inelastic cross section. Cross sections for single strange particles and for strange particle pairs are determined, both inclusively and as functions of the charged multiplicity. Relative production rates for different strange particle combinations are compared with the prediction of the isospin statistical model. Inclusive spectra for single particles are studied and it is found the K S 0 are produced mostly in the forward hemisphere, most probably by fragmentation of the incident pion into K K π . The Λ are mostly backwards, probably deriving from fragmentation of the proton into ΛK pairs. The Λ tend to be produced forwards, but evidence is found for central Λ Λ production. Distributions in rapidity of the Λ particles from π + p interactions are compared in terms of the factorisation hypothesis. Results are given on the Λ transversal polarisation.

9 data tables

No description provided.

No description provided.

No description provided.

More…