A perturbative QCD approach to ${\pi }^{-}p\to D^{-}{\Lambda }_c^{+}$

Abstract

We employ the generalized parton picture to analyze the reaction ${\pi }^{-}p\to D^{-}{\Lambda }_c^{+}$. Thereby it is assumed that the process amplitude factorizes into one for the perturbatively calculable subprocess $\bar{u}u\to \bar{c}c$ and hadronic matrix elements that can be parameterized in terms of generalized parton distributions for the ${\pi }^{-}\to D^{-}$ and $p\to {\Lambda }_c^{+}$ transitions, respectively. Representing these parton distributions in terms of valence-quark light-cone wave functions for $\pi$, $D$, $p$ and ${\Lambda }_c$ allows us to make numerical predictions for unpolarized differential and integrated cross sections as well as spin observables. In the kinematical region where this approach is supposed to work, i.e. $s\gtrsim 20$~GeV${}^2$ and in the forward hemisphere, the resulting cross sections are of the order of nb. This is a finding that could be of interest in view of plans to measure ${\pi }^{-}p\to D^{-}{\Lambda }_c^{+}$, e.g., at J-PARC or COMPASS.

Talk presented by W. Schweiger at "Light Cone 2016", Lisbon, Sep. 5-8, 2016

References in corpus (9)

• Observation of a near-threshold enhancement in the e+e- -->Lambda_c+Lambda_c- cross section using initial-state radiation
• New limits on intrinsic charm in the nucleon from global analysis of parton distributions
• Distribution Amplitudes of the Lambda_b Baryon in QCD
• Exclusive charm production in pbar p collisions at s^1/2 <15 GeV
• Production of charmed pseudoscalar mesons in antiproton-proton annihilation
• Proton-Antiproton Annihilation into a Lambda_c-Antilambda_c Pair
• Production of charmed baryons in $\bar{p}p$ collisions close to their thresholds
• $K^0\Lambda$ and $D^{-}{\Lambda }_c^{+}$ production induced by pion beams off the nucleon
• ${\pi }^{-}p\to D^{-}{\Lambda }_c^{+}$ within the Generalized Parton Picture