Strangeness production in deep inelastic positron - proton scattering at HERA

Aid, S.; Anderson, M.; Andreev, V.; Andrieu, B.; Appuhn, R.D.; Babaev, A.; Bahr, J.; Ban, J.; Ban, Y.; Baranov, P.

doi:10.1016/S0550-3213(96)00503-2

Strangeness production in deep inelastic positron - proton scattering at HERA

H1

Collaboration

Jun, 1996

37 pages

Published in:

Nucl.Phys.B 480 (1996) 3-34

e-Print:

hep-ex/9607010 [hep-ex]

DOI:

10.1016/S0550-3213(96)00503-2

Report number:

DESY-96-122

Experiments:

DESY-HERA-H1

View in:

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Abstract:

Measurements are presented of

K~0

meson and

\Lambda

baryon production in deep-inelastic positron-proton scattering (DIS) in the kinematic range

10 < Q~2 < 70\,

GeV

~2

and

10~{-4} < x < 10~{-2}

. The measurements, obtained using the H1 detector at the HERA collider, are discussed in the light of possible mechanisms for increased strangeness production at low Bjorken-

x

. Comparisons of the

x_F

spectra, where

x_F

is the fractional longitudinal momentum in the hadronic centre-of-mass frame, with results from electron-positron annihilation are made. The

x_F

spectra and the

K~0

``seagull'' plot are compared with previous DIS results. The mean

K~0

and

\Lambda

multiplicities are studied as a function of the centre-of-mass energy

W

and are observed to be consistent with a logarithmic increase with

W

when compared with previous measurements. A comparison of the levels of strangeness production in diffractive and non-diffractive DIS is made. An upper limit of

0.9\,

nb, at the

95\%

confidence level, is placed on the cross-section for QCD instanton induced events.

Note:

36 pages, latex, 15 Figures Report-no: DESY 96-122

16.60.Hb
13.85.Ni
Strangeness production
Deep inelastic scattering
positron p: colliding beams
colliding beams: positron p
positron p: deep inelastic scattering
deep inelastic scattering: positron p
production: strangeness
strangeness: production

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