New vistas in charm production. (arXiv:1811.12033v1 [hep-ph])
<a href="http://arxiv.org/find/hep-ph/1/au:+Szczurek_A/0/1/0/all/0/1">Antoni Szczurek</a>
We discuss some new aspects of charm production trigerred by recent
observations of the LHCb collaboration. The LHCb collaboration measured small
asymmetries in production of $D^+ D^-$ mesons as well as $D_s^+ D_s^-$ mesons.
Is this related to initial quark/antiquark asymmetries in the proton ? Here we
discuss a scenario in which unfavored fragmentations $q/{bar q} to D$ and
$s/{bar s} to D_s$ are responsible for the asymmetries. We fix the strength
of such fragmentations — transition probabilities, by adjusting to the size of
the LHCb asymmetries. This has consequences for production of $D$ mesons in
forward directions (large $x_F$) as well as at low energies. Large asymmetries
are predicted then in these regions. We present here some of our predictions.
Consequences for high-energy neutrino production in the atmosphere are
discussed and quantified. The production of $Lambda_c$ baryon at the LHC is
disussed. Large deviations from the independent-parton fragmentation picture
are found.
We discuss some new aspects of charm production trigerred by recent
observations of the LHCb collaboration. The LHCb collaboration measured small
asymmetries in production of $D^+ D^-$ mesons as well as $D_s^+ D_s^-$ mesons.
Is this related to initial quark/antiquark asymmetries in the proton ? Here we
discuss a scenario in which unfavored fragmentations $q/{bar q} to D$ and
$s/{bar s} to D_s$ are responsible for the asymmetries. We fix the strength
of such fragmentations — transition probabilities, by adjusting to the size of
the LHCb asymmetries. This has consequences for production of $D$ mesons in
forward directions (large $x_F$) as well as at low energies. Large asymmetries
are predicted then in these regions. We present here some of our predictions.
Consequences for high-energy neutrino production in the atmosphere are
discussed and quantified. The production of $Lambda_c$ baryon at the LHC is
disussed. Large deviations from the independent-parton fragmentation picture
are found.
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