# Moscow International School of Physics 2022

24 July 2022 to 2 August 2022
House of International Conferences
Europe/Moscow timezone

## The charm baryons production in high-energy $pp$ collisions at $\sqrt{s}_{pp}$ = 8 TeV

30 Jul 2022, 20:00
2h
House of International Conferences

#### House of International Conferences

Dubna, Russia
Board: 5
Poster (portrait A1 or landscape A0) Young Scientist Forum

### Speaker

Aleksei Chubykin (PNPI)

### Description

The charm hadron production in high-energy $pp$ collisions into the forward
region ($2<\eta<5$) has been recently studied by LHCb experiment at
several centre-of-mass energies of 5, 7 and 13 TeV [1-3].
These studies were done mainly for charm mesons and there is a certain lack
of the data for baryons. Moreover, excited states were not investigated at all.

The ongoing research is devoted to the measurement of relative differential
cross sections for the production of the $\Sigma_c^{++}$, $\Sigma_c^{0}$,
$\Lambda_c(2595)^{+}$ and $\Lambda_c(2625)^{+}$ baryons with respect to their
ground state $\Lambda_c^{+}$. Decays $\Sigma_c^{++,0} \to \Lambda_c^{+} \pi^{\pm}$ and $\Lambda_c^{*+} \to \Lambda_c^{+} \pi^+\pi^-$ followed by
$\Lambda_c^{+} \to pK^{-}\pi^{+}$ are used for these purposes.
The studies are done with the dataset collected by LHCb at the
$\sqrt{s}_{pp}$ = 8 TeV. The obtained results will be useful for
the tuning of the Monte-Carlo generators, especially as they will shed a
light on the hadronisation process. We expect that they may help to obtain
fragmentation fractions for these excited states.

Main analysis steps are selection of the candidates including the separation
of the prompt component, correction on the detection as well as on particle
identification efficiencies. These steps will be discussed in the contribution.
1.  LHCb Collaboration, Prompt charm production in $pp$ collisions at $\sqrt{s}=7$ TeV, Nucl. Phys. B, 871 (2013)
2. LHCb Collaboration, Measurements of prompt charm production cross-sections in $pp$ collisions at $\sqrt{s}=13$ TeV, JHEP 03, 159 (2016), JHEP 09, 013 (2016), JHEP 05, 074 (2017)
3. LHCb Collaboration, Measurements of prompt charm production cross-sections in pp collisions at $\sqrt{s}=5$ TeV, JHEP 06 147 (2017)

### Primary author

Aleksei Chubykin (PNPI)

### Presentation Materials

There are no materials yet.
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