Charm production in deep inelastic scattering has been measured with the ZEUS detector at HERA using an integrated luminosity of 82pb(-1). Charm has been tagged by reconstructing D*(+), D(0), D(+) and D(s)(+) (+c.c.) charm mesons. The charm hadrons were measured in the kinematic range p(T)(D*(+), D(0), D(+)) > 3GeV, p(T)(D(s)(+)) > 2GeV and vertical bar eta(D)vertical bar < 1.6 for 1.5 < Q(2) < 1000GeV(2) and 0.02 < y < 0.7. The production cross sections were used to extract charm fragmentation ratios and the fraction of c quarks hadronising in to a particular charm meson in the kinematic range considered. The cross sections were compared to the predictions of next-to-leading-order QCD, and extrapolated to the full kinematic region in p(T)(D) and eta(D) in order to determine the open-charm contribution, F(2)(c (c) over bar) ( x,Q(2)), to the proton structure function F(2).
Measurement of D mesons production in deep inelastic scattering at HERA RID B-9165-2008 RID C-2169-2008 RID G-5156-2010 RID C-1121-2010 RID C-5889-2009 RID A-9192-2012
Capua M;Fazio S;Mastroberardino A;SCHIOPPA, Marco;Tassi E;
2007-01-01
Abstract
Charm production in deep inelastic scattering has been measured with the ZEUS detector at HERA using an integrated luminosity of 82pb(-1). Charm has been tagged by reconstructing D*(+), D(0), D(+) and D(s)(+) (+c.c.) charm mesons. The charm hadrons were measured in the kinematic range p(T)(D*(+), D(0), D(+)) > 3GeV, p(T)(D(s)(+)) > 2GeV and vertical bar eta(D)vertical bar < 1.6 for 1.5 < Q(2) < 1000GeV(2) and 0.02 < y < 0.7. The production cross sections were used to extract charm fragmentation ratios and the fraction of c quarks hadronising in to a particular charm meson in the kinematic range considered. The cross sections were compared to the predictions of next-to-leading-order QCD, and extrapolated to the full kinematic region in p(T)(D) and eta(D) in order to determine the open-charm contribution, F(2)(c (c) over bar) ( x,Q(2)), to the proton structure function F(2).I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
