Measurement of the D± production asymmetry in 7 TeV pp collisions
- R. Aaij,
- C. Abellan Beteta,
- A. Adametz,
- B. Adeva,
- M. Adinolfi,
- C. Adrover
- National Institute for Subatomic Physics,
- University of Barcelona,
- Heidelberg University,
- University of Santiago de Compostela,
- University of Bristol,
- CNRS
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Abstract
The asymmetry in the production cross-section σ of D ± mesons,AP=σ(D+)-σ(D-)σ(D+)+σ(D-), is measured in bins of pseudorapidity η and transverse momentum p T within the acceptance of the LHCb detector. The result is obtained with a sample of D+→KS0π+ decays corresponding to an integrated luminosity of 1.0 fb -1, collected in pp collisions at a centre of mass energy of 7 TeV at the Large Hadron Collider. When integrated over the kinematic range 2.0
T<18.0 GeV/c and 2.20<η<4.75, the production asymmetry is A P=(-0.96±0.26±0.18)%. The uncertainties quoted are statistical and systematic, respectively. The result assumes that any direct CP violation in the D+→KS0π+ decay is negligible. No significant dependence on η or p T is observed.
Publication Information
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Original language
EnglishPages from-to (Number of pages)
Pages 902-909 (8 pages)Journal (Volume, Issue Number)
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics (Volume 718, Issue 3)Publication milestones
- Published - 08/01/2013
Publication status
ISSN
0370-2693Publication IDs
- Scopus: 84937644650
- WOS: 000314259500017