Charm production in deep inelastic scattering has been measured with the ZEUS detector at HERA using an integrated luminosity of 120 pb(-1). The hadronic decay channels D(+) -> K(S)(0)pi(+), Lambda(+)(c) -> pK(S)(0) and Lambda(+)(c) -> Lambda pi(+), and their charge conjugates, were reconstructed. The presence of a neutral strange hadron in the final state reduces the combinatorial background and extends the measured sensitivity into the low transverse momentum region. The kinematic range is 0 < p(T) ( D(+), Lambda(+)(c)) < 10GeV, vertical bar eta( D(+),Lambda(+)(c))vertical bar < 1.6, 1.5 < Q(2) < 1000GeV(2) and 0.02 < y < 0.7. Inclusive and differential cross sections for the production of D(+) mesons are compared to next-to-leading-order QCD predictions. The fraction of c quarks hadronising into Lambda(+)(c) baryons is extracted.

Measurement of D(+) and Lambda(+)(c) production in deep inelastic scattering at HERA

BRUGNERA, RICCARDO;CARLIN, ROBERTO;GARFAGNINI, ALBERTO;A. Longhin;
2010

Abstract

Charm production in deep inelastic scattering has been measured with the ZEUS detector at HERA using an integrated luminosity of 120 pb(-1). The hadronic decay channels D(+) -> K(S)(0)pi(+), Lambda(+)(c) -> pK(S)(0) and Lambda(+)(c) -> Lambda pi(+), and their charge conjugates, were reconstructed. The presence of a neutral strange hadron in the final state reduces the combinatorial background and extends the measured sensitivity into the low transverse momentum region. The kinematic range is 0 < p(T) ( D(+), Lambda(+)(c)) < 10GeV, vertical bar eta( D(+),Lambda(+)(c))vertical bar < 1.6, 1.5 < Q(2) < 1000GeV(2) and 0.02 < y < 0.7. Inclusive and differential cross sections for the production of D(+) mesons are compared to next-to-leading-order QCD predictions. The fraction of c quarks hadronising into Lambda(+)(c) baryons is extracted.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11577/2490946
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