K*(892)$^+$ production in proton-proton collisions at $E_{beam}=$ 3.5 GeV - INSPIRE

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K*(892) $^+$ production in proton-proton collisions at $E_{beam}=$ 3.5 GeV

HADES

Collaboration

•

G. Agakishiev
(
- Dubna, JINR
)

May 22, 2015

7 pages

Published in:

Phys.Rev.C 92 (2015) 2, 024903

Published: Aug 6, 2015

e-Print:

1505.06184 [nucl-ex]

DOI:

10.1103/PhysRevC.92.024903

Experiments:

GSI-HADES

View in:

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Abstract: (APS)

We present results on the K*(892)+ production in proton-proton collisions at a beam energy of E=3.5 GeV, which is hitherto the lowest energy at which this mesonic resonance has been observed in nucleon-nucleon reactions. The data are interpreted within a two-channel model that includes the three-body production of K*(892)+ associated with the Λ or Σ hyperon. The relative contributions of both channels are estimated. Besides the total cross section σ(p+p→K*(892)++X)=9.5±0.9−0.9+1.1±0.7μb, which adds a new data point to the excitation function of the K*(892)+ production in the region of low excess energy, transverse momenta and angular spectra are extracted and compared with the predictions of the two-channel model. The spin characteristics of K*(892)+ are discussed as well in terms of the spin-alignment.

Note:

7 pages, 9 figures, 1 table

25.40.Ve
14.40.Df
25.75.Dw
K*(892)+
p p: scattering
beam: energy
meson resonance
hyperon
transverse momentum
total cross section

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Figures(9)

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