D* and D Meson Production in Muon Nucleon Interactions at 160 GeV/c - INSPIRE

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D* and D Meson Production in Muon Nucleon Interactions at 160 GeV/c

COMPASS

Collaboration

•

C. Adolph
(
- Erlangen - Nuremberg U.
)

Nov, 2012

22 pages

Published in:

Eur.Phys.J.C 72 (2012) 2253

Published: Dec 11, 2012

e-Print:

1211.1575 [hep-ex]

DOI:

10.1140/epjc/s10052-012-2253-1

Report number:

CERN-PH-EP-2012-339

Experiments:

CERN-SPS-NA58

View in:

reference search7 citations

Citations per year

Abstract: (arXiv)

The production of D* and D mesons in inelastic scattering of 160 GeV/c muons off a ^6LiD target has been investigated with the COMPASS spectrometer at CERN for 0.003 (GeV/c)^2 < Q^2 < 10 (GeV/c)^2 and 3x10^-5< x_Bj < 0.1. The study is based on 8100 events where a D^0 or anti D^0 is detected subsequently to a D*+ or D*- decay, and on 34000 events, where only a D^0 or anti D^0 is detected. Kinematic distributions of D*, D and K*_2 are given as a function of their energy E, transverse momentum p_T, energy fraction z, and of the virtual photon variables nu, Q^2 and x_Bj. Semi-inclusive differential D* production cross-sections are compared with theoretical predictions for D* production via photon-gluon fusion into open charm. The total observed production cross-section for D*+/- mesons with laboratory energies between 22 and 86 GeV is 1.9 nb. Significant cross-section asymmetries are observed between D*+ and D*- production for nu<40 GeV and z>0.6.

Note:

22 pages, 12 figures and 2 tables

D0: electroproduction
D*(2010): electroproduction
cross section: asymmetry
muon nucleon: interaction
photon gluon: fusion
photon: virtual
differential cross section: measured
muon nucleon: inelastic scattering
transverse momentum dependence
energy dependence

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