Measurement of the D+/- production asymmetry in 7 TeV pp collisions

Abstract

The asymmetry in the production cross-section σof D+/- mesons, A_P = (σ(D+) - σ(D-))/(σ(D+) + σ(D-)), is measured in bins of pseudorapidity ηand transverse momentum p_T within the acceptance of the LHCb detector. The result is obtained with a sample of D+ -> K_S pi+ 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 < p_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+ -> K_S pi+ decay is negligible. No significant dependence on ηor p_T is observed.

arXiv comment12 pages, 5 figures

References in corpus (20)

• PYTHIA 6.4 Physics and Manual
• PYTHIA 6.2 Physics and Manual
• Big Bang Nucleosynthesis (in "The Review of Particle Properties" 2004)
• New Physics and CP Violation in Singly Cabibbo Suppressed D Decays
• Evidence for CP violation in time-integrated D0 -> h-h+ decay rates
• Production and Hadronization of Heavy Quarks
• Measurement of sigma(pp -> b anti-b X) at \sqrt(s)=7 TeV in the forward region
• Measurement of the difference of CP-violating asymmetries in D0 -> K+K- and D0 ->pi+pi- decays at CDF
• CP Violation in τ->νπK_S and D->πK_S: The Importance of K_S-K_L Interference
• Interference Between Cabibbo Allowed and Doubly Forbidden Transitions in $D\ra K_{S,L} + π'$s Decays
• First evidence of direct CP violation in charmless two-body decays of Bs mesons
• Measurement of the Ds+ - Ds- production asymmetry in 7 TeV pp collisions
• Evidence for CP Violation in the Decay $D^{+}\to K_S^0{\pi }^{+}$
• Search for CP violation in $D^{+}\to K^{-}{K}^{+}{\pi }^{+}$ decays
• New Physics Effects in Doubly Cabibbo Suppressed D Decays
• Measurement of $V^0$ production ratios in $pp$ collisions at $\sqrt{s}=0.9$ and 7\,TeV
• Search for CP Violation in the Decay D+/- -> Ks pi+/-
• Search for CP Violation in D Meson Decays to phi pi+
• Bottom Production Asymmetries at the LHC
• Heavy Quark Production Asymmetries

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